JP4834515B2 - Distribution system optimum operation system and method, and program - Google Patents

Description

  TECHNICAL FIELD The present invention relates to distribution system monitoring control and distribution automation, and in particular, a distribution system optimum operation system that performs optimum operation of a distribution system by controlling devices to be controlled such as switches and voltage regulators of the distribution system. And is about methods.

  Conventionally, in a distribution automation system of a distribution system, an interchange operation procedure for performing interchange transmission from an adjacent distribution line to a load-side healthy power outage section of an accident section when a distribution line accident occurs is created. When creating this accommodation procedure, the voltage drop of the accommodation destination in the system after accommodation, the bank current to which the accommodation feeder belongs, the current of the accommodation feeder, the current passing through the switch of the accommodation feeder (current relative to the switch capacity and wire capacity), etc. It is checked whether or not it is within the proper range, and an interchange operation procedure that falls within the proper range is adopted (for example, see Patent Documents 1 to 3).

  In addition, the work planning system and equipment planning system used for power distribution system work planning work and equipment planning work also check the appropriate range in the same way as when a distribution line accident occurs and adopt a switching operation procedure that falls within the appropriate range. is doing.

  In addition, in distribution system facility planning work, create a system that minimizes power loss in the distribution system and satisfies various restrictions such as short-circuit capacity restrictions and ground fault current restrictions when a ground fault occurs. Although necessary, power loss calculation, short-circuit capacity calculation, ground fault current calculation, and the like are performed in the facility planning system or individually (see, for example, Patent Document 4).

JP-A-10-201141 JP-A-8-9570 JP 2005-269744 A JP 2004-129404 A

However, the above prior art has the following problems.
First, in the conventional distribution automation system, it is possible to check whether or not the voltage of each node in the distribution system is within the appropriate range, but whether or not the current and voltage at each node are both within the appropriate range. Since it cannot be checked, in the current operation system, the system operation in which the current and voltage of each node are within the appropriate ranges cannot be performed.

  In the conventional distribution automation system, the operation procedure of the accident recovery switch can be automatically executed by controlling the switch online in the event of an accident, but the steps provided in the distribution system Various voltage regulators such as automatic voltage regulators (SVR), static reactive power compensators (SVC), power capacitors (SC), substation load tap change transformers (substation LRT), etc. The procedure cannot be executed automatically.

  Therefore, for example, even if the voltage drop and the switch passing current at each node can be adjusted within an appropriate range by operating the voltage adjusting device, such adjustment cannot be automatically executed online. On the contrary, as described above, since it is not possible to check online whether the current and voltage at each node are within the proper range, it is possible to adjust the current and voltage at each node within the proper range. It is difficult to create an operation procedure for the adjusting device.

  Furthermore, the operation procedures created as accident recovery operations and work plan operations in conventional power distribution automation systems and work plan systems do not consider the effects of power loss, short-circuit capacity, ground fault current, etc. It is not possible to create a more appropriate operating procedure that takes into account the impact.

  The present invention has been proposed in order to solve the above-described problems of the prior art. The purpose of the present invention is to provide a switch and voltage so that the current and voltage at each node of the power distribution system are both within an appropriate range. An object is to provide an optimum distribution system operation method, method, and program capable of creating an optimum operation procedure for the adjusting device and executing it online, and enabling the optimum operation of the distribution system.

  The distribution system optimum operation system according to the present invention is a distribution system optimum operation system that performs optimum operation of a distribution system through a remote monitoring control device and a slave station device provided in the distribution system. Data storage means, measurement / setting value data input means And a state estimation calculation unit, an appropriate range check unit, an operation procedure creation unit, and an operation procedure execution unit. Here, the data storage means is means for storing distribution system data relating to equipment in the distribution system. The measurement / setting value data input means is means for inputting the measurement value data from the remote monitoring control device or setting value data set instead. Based on the distribution system data stored in the data storage means, the state estimation calculation means uses the measurement / setting value data input by the measurement / setting value data input means and the current of each node on the distribution system. It is a means for performing state estimation calculation for calculating a voltage. The appropriate range checking means is means for checking whether or not the calculated current and voltage of each node are within the appropriate range. The operation procedure calculation means, based on the distribution system data stored in the data storage means, the current and voltage of each node as an operation procedure of a plurality of control target devices including a switch and a voltage adjustment device in the distribution system. This is means for creating an operation procedure within an appropriate range. The operation procedure executing means is means for executing the operation procedure by transmitting an operation control signal corresponding to the created operation procedure to the remote monitoring control device and the slave station device via a communication line.

  The distribution system optimum operation method and the distribution system optimum operation program of the present invention are obtained by grasping the characteristics of the above apparatus from the viewpoints of the method and the computer program.

  According to the present invention, the measured value data from the remote monitoring control device or the set value data instead is input to calculate the current / voltage of each node, and the current / voltage of each node is within the appropriate range. Can be automatically checked. Moreover, the operation procedure can be created as a control target device including not only a switch provided in the distribution system but also a voltage adjusting device, and the created operation procedure can be automatically executed. With these functions, if any of the current and voltage at each node falls outside the proper range, it is possible to quickly grasp this and open and close so that the current and voltage at each node are both within the proper range. Since the controller and voltage regulator can be automatically operated and controlled online, the current and voltage of each node can be automatically and quickly adjusted within an appropriate range.

  Therefore, it is possible to create an optimal operation procedure for switches and voltage regulators so that the current and voltage of each node in the distribution system are both within the appropriate range and execute them online, enabling optimal operation of the distribution system. It is possible to provide a distribution system optimum operation system, method, and program.

  Hereinafter, an embodiment of a distribution system optimum operation system of the present invention will be specifically described with reference to the drawings.

[First Embodiment]
[Constitution]
FIG. 1 is a block diagram showing a configuration of a distribution system optimum operation system according to a first embodiment to which the present invention is applied.

  A distribution system optimum operation system 1A shown in FIG. 1 is connected to a remote monitoring control device 3 and slave station devices 4 (41 to 4N) provided in the distribution system 2 through a communication line 5, and the remote monitoring control device 3 And the operation procedure of the control target device including the switch 6 (61-6n) and the voltage adjusting device 7 (71-7m) of the distribution system 2 by transmitting the operation control signal to the slave station device 4 (41-4N). This is a system that performs optimal operation of the distribution system.

  In FIG. 1, the distribution system 2 is schematically represented only for the purpose of indicating the point of communication connection with the distribution system optimum operation system 1 </ b> A and the presence of the control target device. Other devices in the system, specific power distribution paths, specific communication paths, etc. are not shown.

  The distribution system optimal operation system 1A is a computer system realized by a computer such as a personal computer or a workstation, and includes an interface unit 11, a data storage unit 12, a measurement / setting value data input unit 13, an operation procedure calculation unit 14, and an operation. Procedure execution means 15 is included. The details of these means 11 to 15 are as follows.

  The interface means 11 is means for interactively processing information between the human system and the system, and is generally called a user interface, a man-machine interface, or the like. Specifically, the interface unit 11 is realized by input / output software in addition to hardware basically included in a computer such as various output devices such as a display device and various input devices such as a mouse and a keyboard.

  The data storage means 12 is means for storing power distribution system data relating to facilities of the power distribution system. Here, the distribution system data is data related to the hardware configuration of the entire distribution system equipment to be operated. Specifically, the data related to the distribution path configuration of the distribution system, various switches, transformers, and voltage regulators. In addition to the data related to the device configuration such as the above, data related to the communication system such as the remote monitoring control device 3, the slave station device 4, the communication line 5, and the like are included. The data storage unit 12 is realized by various types of memory, auxiliary storage devices, or other various storage media that are basically included in the computer.

  The measurement / setting value data input means 13 is a means for inputting measurement value data from the remote monitoring control device 3 and measurement value data from the slave station device 4 via the communication line 5 as measurement / setting value data. Here, as measured value data from the remote monitoring control device 3, specifically, a feeder current, a bank current, and a substation delivery voltage are input. In addition, as measurement value data from the slave station device 4, current and voltage are basically input. However, depending on a calculation method of state estimation calculation described later, active power, reactive power, and power factor may be input. .

  Further, depending on the calculation method of the state estimation calculation, only the feeder current, bank current, and substation delivery voltage from the remote monitoring control device 3 may be input without inputting the measurement value data from the slave station device 4.

  Further, instead of inputting these measured value data by the measurement / set value data input means 13, set value data set by a human system or a predetermined algorithm, or set value data set by another system is input. May be.

  In addition to the above data, the measurement / setting value data input means 13 displays various information such as display information such as switch on / off information for grasping the state of the distribution system, and line impedance necessary for the state estimation calculation. Enter the specifications and restrictions on system switching.

  The operation procedure calculation means 14 is a means for performing a series of processes until an operation procedure to be executed is created and selected, and a state estimation calculation means 141, an appropriate range check means 142, an operation procedure creation means 143, and an operation means selection. Means 144 are included.

  The state estimation calculation unit 141 uses the measurement / setting value data input by the measurement / setting value data input unit 13 based on the distribution system data stored in the data storage unit 12, and the current of each node on the distribution system. And means for performing state estimation calculation for calculating the voltage. Here, “node” is a term commonly used in the field of power distribution, such as a switch installation point, a voltage adjustment device installation point, a distribution line terminal point, etc. on the distribution system. Indicates the transition point. There are the following two calculation methods (I) and (II) as methods for calculating the current / voltage of each node.

Calculation method (I):
The current of each node is calculated from the feeder current and each section load. The voltage at each node is calculated from the substation delivery voltage, the impedance between each section or distribution path, and each node current.
Calculation method (II):
The power flow is calculated using the feeder current, the substation delivery voltage, and the current value, voltage, active power, reactive power, and power factor, which are measured value data from the slave station device, to calculate the current and voltage of each node.

  Among these, the calculation method (I) does not require the measurement value data from the slave station device 4, and a slight amount of feeder current from the remote monitoring control device 3 and substation sending voltage (or set value data replacing them). Since it can be executed by a very simple calculation just by inputting data, the state estimation calculation can be performed very efficiently and at high speed.

  On the other hand, in the calculation method (II), in addition to the feeder current and the substation delivery voltage, the current, voltage, active power, reactive power, and power factor from each slave station device 4 (or set values instead of them) This is a method for performing complex tidal current calculations by inputting a large amount of data including data), so that the overall state estimation calculation is complicated and the processing time is longer than that of calculation method (I), but tidal current calculation is performed. Therefore, calculation with higher accuracy becomes possible.

  When it is necessary to consider the distributed power supply, the measurement / set value data input means 13 inputs the specifications of the distributed power supply, and the state estimation calculation means 141 inputs the above calculation method (I), By using them in (II), it is possible to perform state estimation calculation considering a distributed power source.

  The appropriate range check unit 142 is a unit that checks whether the current / voltage of each node calculated by the state estimation calculation of the state estimation calculation unit 141 is within the appropriate range. In this case, the feeder current and bank current input by the measurement / set value data input means 13 are also handled in the same manner as the calculated current of each node, and a check is made as to whether these values are within an appropriate range. Do.

  The operation procedure creating means 143 is based on the distribution system data stored in the data storage means 12 when the appropriate range check means 142 detects a value outside the appropriate range from the current or voltage of the node. As a procedure for operating a plurality of control target devices including the internal switch 6 and the voltage adjusting device 7, it is a means for creating an operation procedure for setting the current / voltage of each node within an appropriate range.

  In this case, the operation procedure creation unit 143 uses an algorithm including restrictions on system switching so that the operation procedure of the control target device in the distribution system 2 is set so that the current, voltage, etc. of each node is within the appropriate range. (Controlled devices to be operated and their operation control contents) are created. In other words, depending on the type of the device to be controlled, the switch 6 is turned on / off, and the voltage adjustment device is subjected to its voltage adjustment operation (step-up, step-down, reactive power adjustment). One or a plurality of operation procedures are created so that the current or voltage of the current is within the appropriate range.

  Here, “a phenomenon in which the current or voltage of one node is outside the proper range” is defined as “one error”, and the operation procedure for eliminating this “one error” is referred to as “one operation procedure”. By definition, when the currents or voltages of multiple nodes are outside the proper range, that is, when multiple errors exist, the operation procedure to resolve these “multiple errors” is “multiple operation procedures”. Become. In the following description, from the viewpoint of simplifying the description, “one or a plurality of operation procedures” defined as described above are appropriately abbreviated as “operation procedure group”.

  The operation procedure selection unit 144 is a unit that selects an operation procedure group to be executed from the operation procedure group created by the operation procedure creation unit 143.

  The operation procedure execution means 15 is a means for executing the operation procedure by transmitting an operation control signal corresponding to the created operation procedure to the remote monitoring control device 3 and the slave station device 4 via the communication line 5.

  The measurement / setting value data input means 13, the operation procedure calculation means 14, and the operation procedure execution means 15 as described above are specialized in calculation hardware such as a CPU that the computer basically has and optimal operation of the distribution system. The program is realized by a combination of programs and a communication control device built in the computer.

[Outline of operation]
FIG. 2 is a flowchart showing an outline of the operation of the distribution system optimum operation system 1A of the first embodiment as described above. As shown in FIG. 2, when measurement / setting value data input processing is performed by the measurement / setting value data input means 13 (S01), state estimation calculation processing is performed by the state estimation calculation means 141, and the current of each node is A voltage is calculated (S02). Subsequently, an appropriate range check process for the current / voltage of each node is performed by the appropriate range check unit 142 (S03). The check condition in the appropriate range check process is, for example, the content that “the currents and voltages of all nodes are within the appropriate range”.

  In this proper range check process (S03), when a value outside the proper range is detected from the currents and voltages of all nodes (NO in S03), the operation procedure creation unit 143 performs the operation procedure creation process. An operation procedure group is created so that the current or voltage of the node outside the proper range falls within the proper range (S04).

  Here, assuming the state of the distribution system after each operation procedure of the created operation procedure group is executed, the current / voltage of each node in the distribution system after the operation procedure is executed is compared with that before the operation procedure is executed. Will change. Therefore, in the present embodiment, the state calculation process (S02) and the appropriate range check process (S03) are performed again for the distribution system after the execution of each operation procedure of the created operation procedure group, and this new appropriate range check process is performed. When a value outside the appropriate range is detected again in (S03) (NO in S03), the operation procedure creation process (S04) is performed again to create a new operation procedure.

  Thus, in the present embodiment, during the time when a value outside the proper range is detected in the proper range check process (S03) (NO in S03), the operation procedure creation process (S04), the state calculation process (S02), The appropriate range check process (S03) is repeatedly performed. Then, when a value outside the proper range is no longer detected (YES in S03), an operation to be executed from the created operation procedure (YES in S05) as the operation procedure selection process by the operation procedure selection unit 144. A procedure group is selected (S06). That is, in this case, the latest operation procedure group that meets the check condition of the appropriate range check process is selected as the operation procedure group to be executed. Finally, an operation procedure execution process is performed by the operation procedure execution means 15 for the selected operation procedure group (S07).

  The operation procedure created and executed by such a series of processes is nothing but "operation procedure for keeping the current and voltage of all nodes within the proper range", but such a process procedure is only an example. Absent. For example, as a modification, it is also possible to create and execute an operation procedure for setting the current / voltage of “a node in a specified range” instead of “all nodes” within an appropriate range.

  In addition, if it is determined in the appropriate range check process (S03) that the current / voltage of all nodes is within the appropriate range (YES in S03) before the operation procedure creation process (S04) is performed once, Since the operation procedure is not created (NO in S05), the process is terminated without performing the operation procedure execution process (S07).

[Concrete example]
In the following, as a specific example of the optimal operation of the distribution system by the distribution system optimal operation system 1A of the first embodiment as described above, an operation procedure is created and selected for the distribution system target range 2A shown in FIG. The processing will be described in detail with reference to FIG.

  First, the configuration of the distribution system target range 2A shown in FIG. 3 will be described. This distribution system target range 2A includes distribution banks 20a and 20b for distribution, feeder circuit breakers 21a and 21b, and distribution lines 22a and 22b connected thereto. The distribution lines 22a and 22b are provided with sensor built-in switches 23a to 23d, section switches 24a to 24e, interconnection switches 25a and 25b, and a step-type automatic voltage regulator (SVR) 26.

  Here, the sensor built-in switches 23a to 23d are switches having a function of collecting various measurement information such as current, voltage, active power, reactive power, and power factor. The SVR 26 is a remote control type SVR. These switches 23 to 25 and the SVR 26 are all control target devices for which an operation procedure is to be created, and at the same time, their installation points constitute each node of the power distribution system. Moreover, 27a-27k in the figure has shown each area divided by the switches 23-25.

  For the distribution system target range 2A shown in FIG. 3, first, as measurement / setting value data input processing (S01 in FIG. 2) by the measurement / setting value data input means 13, feeder currents If1, If2, bank currents Ib1, Ib2, The measurement value data of the substation delivery voltages Vb1 and Vb2 are input, and the measurement value data of the current, voltage, active power, reactive power, and power factor of the sensor built-in switches 23a to 23d are input.

  When the remote control type SVR 26 has a measurement function, the measurement information is also input. Here, however, the SVR 26 has no measurement function from the viewpoint of simplifying the explanation.

  Next, as state estimation calculation processing (S02 in FIG. 2) by the state estimation calculation means 141, the current / voltage of the remaining nodes other than the sensor built-in switches 23a to 23d is flowed based on the input measured value data. Calculated by calculation. That is, the current and voltage at the installation points of the division switches 24a to 24e, the current and voltage at both ends of the connection points 25a and 25b, and the current and voltage at the installation point of the remote control type SVR 26 are respectively calculated by power flow calculation. . Here, from the viewpoint of simplifying the explanation, a case where the node is only the installation point of the switch or SVR will be described, but in reality, the node is a device other than the control target device such as a switch or SVR. Points can also be set arbitrarily.

  Subsequently, as a proper range check process (S03 in FIG. 2) by the proper range check unit 142, it is checked whether or not the current / voltage of each node is within the proper range. That is, the current and voltage of the sensor built-in switches 23a to 23d input by the measurement / set value data input process, and the current and voltage of the classification switches 24a to 24e installation points calculated by the state estimation calculation process It is checked whether the current and voltage at both ends of the switch 25a, 25b installation point and the current / voltage at the remote control type SVR 26 installation point are within appropriate ranges. In this case, it is also checked whether or not the values of the feeder current and the bank current input by the measurement / set value data input processing are within an appropriate range.

  For example, in this appropriate range check process, as indicated by a broken line arrow in FIG. 3, the current of the section switch 24d and the voltage of the node on the distribution line 22a side of the interconnection switch 25a are out of the proper range. It is assumed that the node currents and voltages are all within the appropriate range. The case where the current of the segment switch 24d is outside the proper range means that the current passing through the switch in the segment switch 24d exceeds an allowable value, that is, the current of the segment switch 24d is the switch capacity. Or the wire capacity of the load-side section of the section switch 24d is exceeded.

  And as assumed above, in the appropriate range check process, when it is detected that the current of the division switch 24d and the voltage of the node on the distribution line 22a side of the interconnection switch 25a are out of the proper range, As the operation procedure creation process (S04 in FIG. 2) by the operation procedure creation means 16, the current to be controlled and the voltage of the node on the distribution line 22a side of the interconnection switch 25a are within the proper range. Create an operation procedure for.

  In this case, there can be multiple operating procedures that make the current or voltage of the node outside the proper range within the proper range. However, for the selection of the operation procedure, various optimal procedures such as procedural method, metaheuristic method, tab search, etc. Can be applied. Furthermore, it is possible to give priority to nodes, control target devices, and the like.

  Here, as an example, it is assumed that the operation procedure shown in the following (1) and (2) has been created. In addition, in this operation procedure creation process, a method for creating one operation procedure that eliminates only one node out of the proper range out of the nodes determined to be out of the proper range, and out of the proper range of multiple or all nodes. A method of creating a plurality of operation procedures for solving the problem in a batch is considered, but the latter method is adopted here.

(1) In order to bring the current of the section switch 24d into an appropriate range, the connection switch 25b is turned on and the section switch 24d is turned off, and the section 27h is switched from the distribution line 22a to the distribution line 22b ( The passing current of the section switch 24d becomes zero).
(2) An operation procedure for boosting the remote control type SVR 26 so that the voltage of the node on the distribution line 22a side of the interconnection switch 25a is within an appropriate range.

  When the operation procedure (1) is created, the feeder current If2, the bank current Ib2, and the currents of the nodes 23d, 24e, 25b, and 24d of the distribution line 22b after executing the operation procedure are within the appropriate ranges. This check can be performed based on the load in the section 27h.

  When the above operation procedures (1) and (2) are executed, the current of the division switch 24d and the voltage of the node on the distribution line 22a side of the interconnection switch 25a are within the proper range, but the current / voltage distribution is also If the system state is changed, the current or voltage of other nodes may newly fall outside the proper range. Therefore, the state estimation calculation process by the state estimation calculation unit 141 is performed again, whereby the current / voltage of each node is calculated for the distribution system target range 2A after the operation procedures (1) and (2) are executed. A proper range check process is performed by the proper range check unit 142.

  Here, when the current or voltage of another node is out of the proper range again, the operation procedure creating process is performed by the operation procedure creating means 16 so that the current or voltage of the node falls within the proper range. An operating procedure is created.

  Note that, depending on systematic conditions, not all nodes are within the appropriate range, so there is a possibility that the operation procedure creation process, the state estimation calculation process, and the appropriate range check process will be repeated indefinitely. In such a case, after applying a mechanism such as setting a limit on the calculation time or the number of calculated operation procedures and stopping the repetition of processing, the operation procedure is out of the appropriate range. The operation procedure may be selected by selecting an operation procedure that minimizes the number of nodes, or by evaluating whether the created operation procedure optimizes the power distribution system. Details of the evaluation of such an operation procedure will be described later.

  Further, the current / voltage of each node in the distribution system target range 2A after the operation procedures (1) and (2) are executed by the state estimation calculation process (S02 in FIG. 2) by the state estimation calculation means 141. Is calculated, and when the appropriate range check process (S03 in FIG. 2) by the appropriate range check unit 15 is performed and all the nodes are within the appropriate range (YES in S03), the operation procedure selection unit 144 As the operation means selection processing, the operation procedures (1) and (2) are selected as a system control operation procedure group to be executed (YES in S05 in FIG. 2, S06).

  Note that when the SVR 26 is not a remote control type but a self-supporting type, the operation procedure of the SVR 26 is not created, but the state estimation calculation process, the appropriate range check process, and the operation procedure creation process for control target devices other than the SVR are the same. By performing the above, it is possible to similarly create an operation procedure in which the current / voltage of each node is within an appropriate range.

[effect]
According to the distribution system optimum operation system of the first embodiment as described above, the following effects can be obtained.

  That is, according to the present embodiment, the measured value data from the remote monitoring control device or the set value data instead is input to calculate the current / voltage of each node, and the current / voltage of each node is within the proper range. It is possible to automatically check whether it is within. In addition, not only the switches provided in the distribution system but also voltage regulation devices such as SVR can be created as control target devices, and the created operation procedures can be automatically executed. With these functions, if any of the current and voltage at each node falls outside the proper range, it is possible to quickly grasp this and open and close so that the current and voltage at each node are both within the proper range. Since the controller and voltage regulator can be operated and controlled online, the current and voltage of each node can be automatically and quickly adjusted within an appropriate range.

  Therefore, it is possible to create an optimal operation procedure for switches and voltage regulators so that the current and voltage of each node in the distribution system are both within the appropriate range and execute them online, enabling optimal operation of the distribution system. It is possible to provide a distribution system optimum operation system, method, and program.

[Modification]
In FIG. 3, only the step type automatic voltage regulator (SVR) is shown as the voltage regulator in the distribution system. However, the present invention is not limited to the static reactive power compensator (SVC) provided in the distribution system. ), And other various voltage regulators such as power capacitors (SC), substation load tap change transformers (substation LRT), and the operation procedure can be similarly created as control target devices. Excellent effects can be obtained.

[Second Embodiment]
[Constitution]
FIG. 4 is a block diagram showing a configuration of a distribution system optimum operation system according to the second embodiment to which the present invention is applied.

  The distribution system optimum operation system 1B shown in FIG. 4 is obtained by adding an operation procedure management means 16 and an evaluation execution means 17 to the configuration of the first embodiment. Here, the operation procedure management means 16 is a means for managing the operation procedure group created by the operation procedure calculation means 14 and selected as the operation procedure group to be executed, and the operation procedure storage means 161 for storing the operation procedure group. And a possibility determination means 162 for determining the possibility of another operation procedure group.

  In addition, the evaluation execution unit 17 performs the evaluation of whether or not each operation procedure group stored by the operation procedure storage unit 161 is an operation procedure group that optimizes the power distribution system. A means for calculating a preset evaluation function including elements. The evaluation execution unit 17 includes an element calculation unit 171 that calculates the value of each evaluation target element, and an evaluation calculation unit 172 that calculates an evaluation function using the calculation result of each evaluation target element.

  The operation procedure management means 16 and the evaluation execution means 17 as described above are a group of operation procedures incorporated in a calculation hardware such as a CPU basically included in a computer and a program specialized for optimal distribution system operation. Basically realized by a combination of management functions and evaluation execution functions. The evaluation execution means 17 can also be realized by an independent program specialized for evaluation execution separately from the distribution system optimum operation program.

  Further, the storage area of the operation procedure storage unit 161 is realized by various types of memory, auxiliary storage devices, or other various storage media that are basically included in the computer. Here, from the viewpoint of simplifying the explanation, a storage area is provided separately from the data storage unit 12. However, as a modification, a storage area may be provided in a part of the data storage unit 12.

[Outline of operation]
FIG. 5 is a flowchart showing an outline of the operation of the distribution system optimum operation system 1B of the second embodiment as described above. In FIG. 5, a box indicating an operation procedure calculation process (S10) described after the measurement / set value data input process (S01) is a series of processes by the operation procedure calculation means 14, that is, the state shown in FIG. A series of processes (S02 to S06) from the estimation calculation process to the operation procedure selection process are simply shown.

  In this embodiment, the operation procedure group (YES in S11) created and selected by the operation procedure calculation process (S10) is temporarily stored as the operation procedure storage process by the operation procedure storage unit 161 of the operation procedure management unit 16. (S12). Next, as a possibility determination process by the possibility determination means 162, there may be another group of operation procedures that can eliminate the error (the current / voltage of the node outside the appropriate range can be within the appropriate range). Sex is determined (S13). If there is a possibility that another operation procedure group capable of resolving the error exists (YES in S13), the process returns to the operation procedure creation basic processing (S10), the operation procedure storage processing (S12), and the possibility determination. The process (S13) is repeatedly performed.

  As described above, in the present embodiment, during the possibility determination process (S13), while it is detected that there is a possibility that another operation procedure group that can resolve the error exists (YES in S13), the basic process for creating the operation procedure is performed. (S10), the operation procedure storage process (S12), and the possibility determination process (S13) are repeatedly performed.

  Then, at the time when the possibility that another operation procedure group capable of resolving the error exists is not detected (NO in S13), each stored operation procedure is performed as an element calculation process by the element calculation unit 171 of the evaluation execution unit 17. The value of the evaluation target element is calculated for the group (S14). Subsequently, as an evaluation calculation process by the evaluation calculation means 172, an evaluation function is calculated using the calculated value of the evaluation target element, and an operation procedure group that minimizes or maximizes the value of the evaluation function should be executed. It is selected as an operation procedure group (S15).

  In this case, the evaluation function is a function including at least one item selected from, for example, the minimum power loss, the short-circuit capacity restriction, and the ground fault current restriction at the time of the ground fault. The evaluation target element includes at least one element selected from power loss, short-circuit capacity, and ground fault current according to items included in the evaluation function.

  The operation procedure group created and executed by such a series of processes is “an operation procedure group for keeping the current / voltage of each node within an appropriate range”, and further according to the evaluation function. Thus, it becomes a group of operating procedures that enables more optimal system operation that minimizes power loss, satisfies the short-circuit capacity constraint, and satisfies the ground-fault current constraint at the time of a ground fault.

  Therefore, in this embodiment, the operation procedure execution process is performed by the operation procedure execution unit 15 for the operation procedure group that enables more optimal system operation (S07).

  Further, in the operation procedure calculation process (S10), the current / voltage of all the nodes is within the appropriate range in the appropriate range check process before the operation procedure creation process (S04 in FIG. 2) is performed (S03). If it is determined as “YES”, no operation procedure has been created (NO in S05 of FIG. 2), and therefore there is no selected operation procedure group (NO in S11). Therefore, an operation procedure execution process (S07). ), The process is terminated as it is.

[Concrete example]
In the following, as a specific example of the optimum operation of the distribution system by the distribution system optimum operation system 1B of the second embodiment as described above, an operation procedure is created and selected for the distribution system target range 2B shown in FIG. The processing will be described in detail with reference to FIG. 2 and FIG.

  First, the configuration of the distribution system target range 2B shown in FIG. 6 will be described. The distribution system target range 2B includes a distribution transformer bank 20c, feeder circuit breakers 21c to 21e, and distribution lines 22c to 22e connected thereto. The distribution lines 22c to 22e are provided with sensor built-in switches 23e to 23i, division switches 24f to 24k, and interconnection switches 25c and 25d. These switches 23 to 25 are all control target devices for which the operation procedure is to be created, and at the same time, their installation points constitute each node of the distribution system. In the figure, reference numerals 27l to 27y denote individual sections divided by the switches 23 to 25.

  For the distribution system target range 2B shown in FIG. 6, first, as measurement / setting value data input processing (S01 in FIG. 5) by the measurement / setting value data input means 13, feeder currents If1, If2, bank currents Ib1, Ib2, The measurement value data of the substation delivery voltages Vb1 and Vb2 are input, and the measurement value data of the current, voltage, active power, reactive power, and power factor of the sensor built-in switches 23a to 23d are input as shown in FIG. This is the same as the specific example shown in FIG.

  Further, by the operation procedure calculation process (S10 in FIG. 5, that is, the process from S02 to S06 in FIG. 2) by the operation procedure calculation means 14, “the current or voltage of the node outside the proper range is within the proper range. The point that “single or plural operation procedures” are created and selected as an operation procedure group for system control to be executed is also the same as the specific example shown in FIG.

  In this example, in the appropriate range check process (S03 in FIG. 2), as indicated by a broken line in FIG. 6, it is detected that the passing current of the sensor built-in switch 23f is outside the appropriate range (in S03 in FIG. 2). NO), it is assumed that the following operation procedure (3) has been created in the operation procedure creation process (S04 in FIG. 2) in order to keep this passing current within the appropriate range.

(3) In order to keep the passing current of the sensor built-in switch 23f within an appropriate range, the connection switch 25c is turned on and the section switch 24h is turned off, and the section 27s is changed from the distribution line 22d to the distribution line 22c. (The passing current of the sensor built-in switch 23f is reduced by switching the load).

  From the viewpoint of simplifying the explanation, it is determined that the current and voltage of all nodes in the distribution system target range 2B are within the proper range even after the operation procedure (3) is executed. In the selection process, it is assumed that the operation procedure (3) is selected as a group of operation procedures for system control to be executed.

  In this way, when the operation procedure (3) is created and selected by the operation procedure calculation process (S10 in FIG. 5) (YES in S11 in FIG. 5), the operation procedure management means 16 operates. As the operation procedure storage process (S12 in FIG. 5) by the procedure storage unit 161, the operation procedure (3) is stored.

  Next, as a possibility determination process (S13 in FIG. 5) by the possibility determination means 162, it is determined whether or not there is a possibility that another operation procedure group capable of eliminating the error exists. In this example, this determination is performed by searching whether there is another method for switching the load side of the sensor built-in switch 23f to another distribution line in the distribution system target range 2B of FIG. In this case, since there is another method of switching the load side of the sensor built-in switch 23f to another distribution line, it is determined that “another operation procedure group that can eliminate the error may exist” (FIG. 5). S13 YES). This possibility determination process does not determine whether or not there is actually another operation procedure group, but determines whether or not there is a systematic possibility.

  If there are a large number of node errors, the number of operation procedure groups for resolving them becomes enormous. Therefore, the calculation time, the number of calculated operation procedure groups, and other conditions (for example, the section is changed to other When switching to a distribution line, a mechanism is required to provide restrictions such as only one section). It is also possible to calculate other operation procedure groups by giving priority to the contents of nodes and errors (separate current and voltage).

  Next, the procedure returns to the operation procedure calculation process (S10 in FIG. 5) by the operation procedure calculation means 14, and another operation procedure group that can eliminate the error is created. In this case, the state estimation calculation process and the appropriate range check process (S02 and S03 in FIG. 2) using the input measurement / set value data are performed at the time of creating the first operation procedure group. If it is stored, it is not necessary to carry out the second and subsequent times. In the operation procedure creating process (S04 in FIG. 2) by the operation procedure creating unit 143, the operation procedure group temporarily saved in the operation procedure saving process is referred to so as not to duplicate the already created operation procedure group. Other operation procedure groups are created. Here, it is assumed that the following operation procedure (4) has been created as another operation procedure group in order to keep the passing current of the sensor built-in switch 23f within an appropriate range.

(4) The connection switch 25d is turned on and the section switch 24j is turned off to switch the section 27v from the distribution line 22d to the distribution line 22e.

  From the viewpoint of simplifying the explanation, it is determined that the currents and voltages of all the nodes in the distribution system target range 2B are within the appropriate range even after the operation procedure (4) is executed (S03 in FIG. 2). YES) As a result, it is assumed that the operation procedure (4) is selected as a new operation procedure group for system control to be executed in the operation procedure selection process (S06 in FIG. 2).

  As described above, when the operation procedure (4) is created and selected as a new operation procedure group by the operation procedure calculation process, the operation procedure storage unit 161 of the operation procedure management unit 16 stores the operation procedure. As the process (S12 in FIG. 5), after the operation procedure of (4) is stored, as the possibility determination process (S13 in FIG. 5) by the possibility determination means 162, still another operation procedure group that can eliminate the error is A determination is made whether there is a possibility of being present.

  Here, for example, assuming that the condition “only one section is used when switching a section to another distribution line” is set, the method of switching the load side of the sensor built-in switch 23f to another distribution line is as follows. Since there is no operation procedure other than the operation procedures (3) and (4), it is determined that “there is no possibility of other operation procedure groups that can solve the error” (NO in S13 of FIG. 5).

  Subsequently, as the element calculation process (S14 in FIG. 5) by the element calculation unit 171 of the evaluation execution unit 17, the value of the evaluation target element is calculated for each stored operation procedure group, and then the evaluation calculation by the evaluation calculation unit 172 is performed. As processing (S15 in FIG. 5), evaluation calculation is performed using the calculation result of the element calculation processing, and an operation procedure group that minimizes or maximizes the evaluation function is selected.

  Here, as an example, it is assumed that the evaluation target element is the power loss and the evaluation function is the minimum power loss. In this case, as the element calculation process (S14 in FIG. 5), the power loss calculation is performed for the distribution system target range 2B after the operation procedures (3) and (4) are executed, and the evaluation calculation process (FIG. 5 (S15), the operation procedure that minimizes the power loss is selected. For example, if the distribution system target range 2B after executing the operation procedure (4) has a smaller power loss than the distribution system target range 2B after executing the operation procedure (3), The operation procedure (4) that minimizes power loss is selected as a group of operation procedures for system control to be executed.

  In the above description, the evaluation function is “minimum power loss”, but the evaluation function to be specifically used can be freely set. Other evaluation functions include, for example, “short circuit capacity constraint”, “ground fault current constraint when a ground fault occurs”, “system switching constraint”, “control target device constraint”, “control target device Priority (for example, priority is given to the control of the switch over the control of the voltage regulator), etc. Also, by setting multiple evaluation functions and assigning priorities to the evaluation functions, or by assigning weights, etc., a comprehensive evaluation function that numerically evaluates multiple evaluation items according to their importance is created. It is also possible to comprehensively evaluate the operation procedure group using the evaluation function.

[effect]
According to the distribution system optimum operation system of the second embodiment as described above, the following effects can be obtained in addition to the effects of the first embodiment.

  That is, according to the present embodiment, after creating / selecting an operation procedure in which the current and voltage of each node of the distribution system are both within the appropriate range, the power loss, Because it is possible to automatically perform evaluation calculations using evaluation functions such as the effect on short-circuit capacity and the effect on the ground fault current when a ground fault occurs, the operating procedure with the best evaluation results for these effects Can be automatically selected and executed. Therefore, both the current and voltage of each node in the distribution system are within the proper range, and power loss is small, and there is no problem with short-circuit capacity and ground fault current when a ground fault occurs. Become.

[Other Embodiments]
It should be noted that the present invention is not limited to the above-described embodiments, and various other variations can be implemented within the scope of the present invention. That is, the system configuration shown in the drawings is merely an example of a functional configuration, and a specific hardware configuration and software configuration can be selected as appropriate. The configuration of the power distribution system shown in the drawings is also merely an example, and the present invention can be similarly applied to a power distribution system having various configurations, and similarly excellent effects can be obtained.

  In the second embodiment, the evaluation for selecting the operation procedure to be executed is automatically performed in the distribution system optimum operation system. You may implement | achieve as an evaluation execution process including the cooperation process with another system used, or the interactive process with a human system.

  Specifically, the operation procedure created and selected in the distribution system optimum operation system is passed to another system that performs evaluation calculation, and the modification procedure for obtaining the evaluation result from the other system and selecting the operation procedure to be executed, The operation procedure and its evaluation results are presented to the human system, and confirmation instructions from the human system are obtained through interactive processing with the human system through the interface means, or various instructions and data for evaluation calculation are obtained. A modification example in which the evaluation calculation is performed after the acquisition is considered. In the former case, the evaluation function in another system can be used, the functional configuration of the distribution system optimum operation system itself can be simplified, and the processing load can be reduced. In the latter case, a flexible operation is possible in which a person in charge of business sets a predetermined evaluation function and executes an arbitrary evaluation calculation.

  Furthermore, a modification in which an additional evaluation execution process including a cooperation process with another system or an interactive process with a human system is performed after the evaluation execution process is performed in the distribution system optimum operation system. In this case, the operation procedure to be executed can be subjected to multiple evaluations from various viewpoints, and more flexible operation is possible.

The block diagram which shows the structure of the distribution system optimal operation system which concerns on 1st Embodiment to which this invention is applied. The flowchart which shows the outline of operation | movement of the distribution system optimal operation system of 1st Embodiment. The figure which shows an example of the distribution system object range used as the application object of this invention. The block diagram which shows the structure of the distribution system optimal operation system which concerns on 2nd Embodiment to which this invention is applied. The flowchart which shows the outline of operation | movement of the distribution system optimal operation system of 2nd Embodiment. The figure which shows an example of the distribution system object range used as the application object of this invention.

Explanation of symbols

1A, 1B ... Distribution system optimum operation system 11 ... Interface means 12 ... Data storage means 13 ... Measurement / setting value data input means 14 ... Operation procedure calculation means 141 ... State estimation calculation means 142 ... Appropriate range check means 143 ... Operation procedure creation Means 144 ... Operation procedure selection means 15 ... Operation procedure execution means 16 ... Operation procedure management means 161 ... Operation procedure storage means 162 ... Possibility determination means 17 ... Evaluation execution means 171 ... Element calculation means 172 ... Evaluation calculation means 2 ... Distribution system 2A, 2B ... Distribution system target range 20a-20c ... Transformer banks 21a-21e ... Feeder circuit breakers 22a-22e ... Distribution lines 23a-23i ... Sensor built-in switches 24a-24k ... Section switches 25a-25d ... Interconnection switching 26 ... Step type automatic voltage regulator (SVR)
27a to 27y ... section 3 ... remote control monitoring device 4 (41 to 4N) ... slave station device 5 ... communication line 6 (61 to 6n) ... switch 7 (71 to 7m) ... voltage regulator

Claims (14)

In the distribution system optimum operation system that performs the optimum operation of the distribution system through the remote monitoring control device and the slave station device provided in the distribution system,
Data storage means for storing distribution system data relating to the facilities of the distribution system;
Measurement / setting value data input means for inputting measurement value data from the remote monitoring control device or setting value data set instead thereof as measurement / setting value data;
Based on the distribution system data stored in the data storage means, the state estimation calculation is performed to calculate the current and voltage of each node on the distribution system using the measurement / setting value data input by the data input means. State estimation calculation means;
A proper range check means for checking whether or not the calculated current and voltage of each node are within the proper range;
Based on the distribution system data stored in the data storage means, an operation procedure for setting the current and voltage of each node within an appropriate range as an operation procedure of a plurality of control target devices including switches and voltage adjustment devices in the distribution system An operation procedure creation means for creating a procedure;
Power distribution characterized by having an operation procedure execution means for executing the operation procedure by transmitting an operation control signal corresponding to the created operation procedure to the remote monitoring control device and the slave station device via a communication line System optimal operation system. The operation procedure execution means is configured to execute an operation procedure obtained as an execution result of an evaluation as to whether or not the created operation procedure is an operation procedure for optimizing a distribution system. The distribution system optimal operation system according to claim 1. The distribution system optimum operation system according to claim 2, wherein the execution of the evaluation is performed as a process including a cooperation process with another system or an interactive process with a human system. In order to perform the evaluation, it has an evaluation execution means for calculating a preset evaluation function including one or a plurality of evaluation target elements, the evaluation execution means,
Element calculation means for calculating the value of each evaluation target element;
The distribution system optimum operation system according to claim 2, further comprising function calculation means for calculating an evaluation function using a calculation result of each evaluation target element. The evaluation target element includes at least one element selected from power loss, short-circuit capacity, and ground fault current,
5. The evaluation function according to claim 4, wherein the evaluation function includes at least one item selected from among a minimum power loss, a short-circuit capacity constraint, and a ground-fault current constraint in the event of a ground fault. Power distribution system optimal operation system. The distribution system optimum operation according to claim 4 or 5, wherein the evaluation execution unit is configured to perform processing including cooperation processing with another system or interactive processing with a human system. system. The operation procedure execution means obtains the operation procedure obtained as the execution result of the evaluation by the evaluation execution means as the execution result of the final evaluation including cooperation processing with another system or interactive processing with a human system. The distribution system optimum operation system according to any one of claims 4 to 6, wherein the system is configured to execute a specified operation procedure. The measurement / setting value data input means is configured to input measurement value data from the remote monitoring control device and measurement value data from the slave station device via the communication line. The distribution system optimum operation system according to any one of claims 1 to 7. The measurement / setting value data input means inputs a feeder current, a bank current, and a substation delivery voltage as measurement value data from the remote monitoring and control device, and a current as measurement value data from the slave station device. The distribution system optimal operation system according to claim 8, wherein the system is configured to input a voltage. The measurement / setting value data input means is configured to input active power, reactive power, and power factor in addition to current and voltage as measurement value data from the slave station device. Item 10. The distribution system optimal operation system according to Item 9. The measurement / setting value data input means is configured to input only feeder current, bank current, and substation delivery voltage as measurement value data from the remote monitoring control device or substitute value data set instead. The distribution system optimum operation system according to any one of claims 1 to 7, wherein the distribution system optimum operation system is provided. The voltage regulator is selected from a step-type automatic voltage regulator (SVR), a static reactive power compensator (SVC), a power capacitor (SC), and a load-time tap switching transformer (substation LRT). The distribution system optimum operation system according to any one of claims 1 to 11, wherein the distribution system includes one or more types of devices. In the distribution system optimum operation method for performing the optimum operation of the distribution system through the remote monitoring control device and the slave station device provided in the distribution system,
Distribution system optimum having data storage means for storing distribution system data relating to the facilities of the distribution system, measurement / setting value data input means, state estimation calculation means, appropriate range check means, operation procedure creation means, and operation procedure execution means Using the operational system,
A process of inputting measured value data from the remote monitoring control device or set value data set instead thereof as measured / set value data by the measured / set value data input means;
Based on the distribution system data stored in the data storage unit, the current of each node on the distribution system is measured by the state estimation calculation unit using the measurement / set value data input by the measurement / set value data input unit. A process for calculating the voltage and
Processing for checking whether or not the calculated current and voltage of each node are within an appropriate range by the appropriate range check means;
Based on the distribution system data stored in the data storage means, the operation procedure creating means operates the current and voltage of each node as an operation procedure of a plurality of control target devices including a switch and a voltage adjustment device in the distribution system. A process for creating an operation procedure within the appropriate range;
The operation procedure executing means includes processing for executing the operation procedure by transmitting an operation control signal corresponding to the created operation procedure to the remote monitoring control device and the slave station device via a communication line. The optimal distribution system operation method. In the distribution system optimum operation program that realizes the distribution system optimum operation system that performs the optimum operation of the distribution system through the remote monitoring control device and the slave station device provided in the distribution system using a computer,
When the distribution system optimal operation system has data storage means for storing distribution system data related to the facilities of the distribution system,
A measurement / setting value data input function for inputting measurement value data from the remote monitoring control device or setting value data set instead thereof as measurement / setting value data;
A state in which the current and voltage of each node on the distribution system are calculated based on the distribution system data stored in the data storage means, using the measurement / set value data input by the measurement / set value data input function A state estimation calculation function for performing estimation calculation;
An appropriate range check function for checking whether or not the calculated current and voltage of each node are within the appropriate range;
Based on the distribution system data stored in the data storage means, an operation procedure for setting the current and voltage of each node within an appropriate range as an operation procedure of a plurality of control target devices including switches and voltage adjustment devices in the distribution system Operation procedure creation function to create procedures,
By causing the computer to realize an operation procedure execution function for executing the operation procedure by transmitting an operation control signal corresponding to the created operation procedure to the remote monitoring control device and the slave station device via a communication line. A distribution system optimal operation program.

Images