JPH0767237B2 - Power system operating device - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to an operating device of a power system, and in particular, when performing flexible power transmission from a sound distribution line in an arbitrary power failure section or a planned power failure section or other healthy distribution lines. The present invention relates to an operating device of a power system that prevents an overload from occurring on a distribution line on the side.

TECHNICAL BACKGROUND OF THE INVENTION A conventional device of this type will be described with reference to FIG. Sixth
In the figure, SS is a distribution substation, which is usually equipped with a transformer TR and leads a distribution line F from a bus BUS through a feeder (distribution line) breaker CB. The distribution line F is divided into distribution sections k ₁ , k ₂ , k _3, ... By a plurality of division switches SW, and is connected to other distribution lines. On the other hand, CT is a current transformer for detecting the feeder current (current of the distribution line lead-out part), and CM is a feeder current measuring instrument. Closing state signal of the switch such as output signals and feeder circuit breaker CB or the sectionalizing switches SW of the current measuring instrument, Tele slave station TC ₁ constituting the signal transmission apparatus, TC _2, TC ₃
… And control panel monitoring board K via the teleconverter master station TC ₀
Input to B and interchange power transmission controller CONT. Monitoring board KB
Displays the current switch status of the power distribution system, feeder current, etc., and the interchange power transmission operation unit (consisting of a digital computing device such as a computer) CONT is obtained from the signal transfer device in its memory section. In addition to the stored online information, it also stores the section load current value scheduled for each distribution section, for example, k ₁ , k ₂ , k ₃ . The section load current can be fetched as online information via the signal transmission device.

The function of the flexible power transmission operation device CONT is to store previously stored information and online information when an accident occurs in the power distribution system, when an overload is detected, or when a work power failure is performed based on an operator's instruction. From the above, calculation for flexible power transmission (hereinafter referred to as flexible calculation) is performed, and the calculation result is sent as a control signal to the switch via the signal transmission device. The Desk is a console for the operator to operate.

By the way, the above-mentioned flexible calculation is a given constraint
One or more power outage sections and the state of the distribution system (information indicating the connection between the section switches and sections, that is, which of the section switches connected to both ends of a certain distribution section is the starting point and which is the ending point) , Based on the switching status signal of the switch, the current of transformers and distribution lines, and the load current of each distribution section), from a healthy distribution line to the group of outage sections subject to the interchange transmission, This is a calculation for finding the optimum distribution line operating means (optimal solution) that matches the objective function for flexible power transmission. The objective function means, for example, minimizing supply disruption, averaging reserve capacity of each distribution line after interchange power transmission, and the like.

Next, the function (accommodation calculation) of the conventional interchange power transmission operation unit CONT will be described with reference to the distribution system diagram. Figure 7 shows the state during normal state, is K _1, K _2, K ₃ distribution leg group noteworthy as a blackout interval later. SS ₁ , SS ₂ ,, SS ₃ …, SSx are distribution substations, and the distribution lines F ₁ , F ₂ , F ₃ …, Fx are derived via feeder breakers CB ₁ , CB ₂ , CB ₃ …, CBx. is doing. Distribution leg groups K ₁ Notably, K _2, K ₃ are transmission from all distribution lines Fx, distribution line F ₁ adjacent thereto distribution leg groups _{K 1, K 2, K 3} , F 2,
F reserve of ₃ each _{F 1: 50 [A],} F 2: 60 [A], F 3: 1
Assume that it is 0 [A]. It should be noted that the switch symbols in the figure are indicated by black circles in a closed state, and those indicated by white circles are in an open state.

Now, in the state of FIG. 7, the distribution section group of the distribution line Fx
When an accident occurs in Kx or the distribution line Fx is overloaded and power cannot be transmitted to the distribution section groups K ₁ , K ₂ and K ₃ and the switch SWx is opened, distribution as shown in Fig. 8 is performed. Section K ₁ , K ₂ , K ₃
It is assumed that all of them have lost power. Then, the interchange power transmission controller CONT
Size of section load of power failure section group K ₁ , K ₂ , K ₃ (K ₁ : 30 [A],
K ₂ : 20 [A], K ₃ : 10 [A]), reserves of distribution lines adjacent to these distribution sections (F ₁ : 50 [A], F ₂ : 60 [A], F ₃ : 10
[A]), switch SW ₁ ~SW _3, SW ₄ ~SW but _six status signals which mean that performing the flexibility calculated based, system configuration of a distribution line which is adjacent to the blackout period group when conventional flexible computing Without changing the above, the existing system configuration is used for flexible power transmission to calculate whether or not there is reserve capacity, and flexible power transmission from a healthy distribution line judged to have reserve capacity to a power failure section Met.

Hereinafter, such accommodation calculation will be described using a table.

First, when starting the flexibility calculation to groups blackout interval K _1, K _2, K _3, switch SW ₁ is connected directly to the power failure section group K _1, K _2, K ₃
~ Keep all SW ₆ open virtually. Next, the blackout section groups K ₁ , K ₂ , and K ₃ are arranged in ascending order of section load (Table 1).

If it is assumed that the distribution lines F _{1 to} F ₃ ignore the actual connection state between the distribution sections and transmit power to the blackout section groups K _{1 to} K _{3 using} only the size of the section load as a determination factor, Determine how many sections the distribution lines F ₁ to F ₃ can transmit. The results of this judgment are shown in Table 2.

Then, the given number of blackout sections is α (α = 3 in this case)
Then, using the formula α ≧ a ₁ + a ₂ + a ₃ = Σai, the combination of the number of transmission sections ai of each distribution line is obtained, and this is shown in Table 3.

However, 0 ≦ a ₁ ≦ a ₁ max 0 ≦ a ₂ ≦ a ₂ max 0 ≦ a ₃ ≦ a ₃ max From Table 3, for each combination case of a ₁ , a ₂ , and a ₃ , the constraint conditions on the system connection and the total load of the sections to be accommodated do not exceed the reserve capacity of the interchange side distribution lines F _{1 to} F _3. The flexible section is determined by the range. This determined combination of the interchange sections is shown as a pattern (Table 4).

In addition, in Table 4, as
Since it is not a practical solution when one section K _{1 to} K ₃ is simultaneously transmitted from two distribution lines, it is marked as * and excluded from the following calculations.

Next, it is evaluated whether or not each pattern matches an objective function (for example, minimization of supply hindrance, minimization of flatness Kp of reserve capacity of each distribution line after accommodation). Table 5 shows the indicators for evaluation
As shown in. The uniformity Kp is calculated from the following equation.

Here, Fi _YB is the reserve capacity after the flexible transmission of the distribution line i.

As can be seen from Table 5, when the minimum supply hindrance of the two objective functions is the first-priority objective function and the uniformity Kp is the second-ranked objective function, the pattern is the optimum solution.

Based on the results of the above flexible calculations reserve after interchange power transmission each _{F 1: 20 [A],} F 2: 30 [A], F 3: As a 10 [A], switch SW ₃ The interchange power transmission operator CONT outputs an operation command to the switch via the signal transmission device so as to close SW _4, and switch SW ₅ . As the system configuration diagram at this time is shown in FIG. 9, the distribution section K ₁ is interchanged through the distribution line F _1, and the distribution sections K ₂ and K ₃ are interchanged through the distribution line F ₂ .

Although the example of FIG. 7 is an extremely simple distribution system, there are 17 patterns to be evaluated as described above. When trying to find an optimal solution in an actual system, it is necessary to evaluate hundreds of thousands to millions of patterns due to the complicated distribution system, and it is impossible for the operator to perform this evaluation. It is not practical to store all 100,000 to several million patterns in the memory because the memory capacity increases.
In reality, each time a pattern is generated, the pattern with the smaller uniformity is left as compared with the previously obtained solution.

[Problems of Background Art] However, the conventional operating device of the power system has the following problems. That is, since the number of patterns to be evaluated becomes large as described above, the processing time of the flexible calculation becomes very long, and a delay occurs when performing an urgent process. In addition, in order to remotely control the section switches of the distribution line, it is necessary to install a teleconverter slave station for each of the many section switches, and it is costly to control all the section switches remotely. Since it is practically impossible to do so, normally, only about 20% of the whole (actual ratio slightly differs depending on each field) can be controlled remotely. Therefore, if the flexible calculation is performed by the method as described above, it is very likely that the created procedure includes a section switch which cannot be remotely controlled (has no remote control function). In this case, it is necessary for the worker to go to the site in order to control the division switch without remote control, which causes a delay when performing an urgent process. In a similar case, even in the case of a remotely controlled division switch, work is performed on condition of a power outage in the distribution section that is being worked on site, so charging this section will cause a serious accident (personal injury or equipment damage, etc.). Therefore, the section switches around this section should not be controlled remotely.

As described above, unconditional flexible calculation for all the segment switches often requires a lot of time to recover from a power failure due to an accident, etc. Not only is it lengthened, but there is also the problem of increasing the burden on workers for field work.

[Object of the Invention] The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide an economical system capable of reliably restoring a power failure section due to an accident or the like in an extremely short time. Another object of the present invention is to provide a highly reliable operating device for a power system.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention provides an operating device of a power system for operating a partitioning switch, which is necessary so as to perform flexible power transmission from another distribution line based on a flexible calculation, from the outside. Based on the input type information or individual information, the switch limiter that determines the operation prohibited switch that should be removed from the interchange calculation among the category switches provided in the distribution system, and the concession section and the adjacent switch An accommodation power transmission means for performing accommodation calculation is provided based on a division switch provided between the electric wire and the division switch excluding the operation prohibition switch.

In the present invention configured as described above, the operation prohibiting switch to be excluded from the interchange calculation among the classification switches provided in the distribution system is classified into the type information or the individual information input from the outside by the switch limiting means. Determined based on When the type information is input, the classification switches corresponding to the type are collectively defined as operation prohibited switches. When the individual information is input, the section switch individually specified by the individual information is determined as the operation prohibited switch.

When recovering a power failure section by carrying out flexible power transmission from another healthy distribution line to the concession section, it is flexible how much power from which distribution line will be used to transfer the power to the concession section. It is determined by the flexibility calculation in the power transmission means.
At this time, the operation prohibition switch defined by the switch limiting means is excluded from the accommodation calculation. By excluding the operation prohibiting switch from the accommodation calculation, the above-described pattern to be evaluated is significantly reduced and the processing time of the accommodation calculation is shortened.

In addition, by inputting the classification switch that does not have the remote control function and cannot be controlled remotely into the switch limiting means by type information, or by inputting the classification switch that cannot be controlled remotely due to a failure as individual information. Since it is possible to define a section switch that cannot be remotely controlled as an operation prohibition switch and eliminate human intervention such as manual operation of the section switch to restore a power failure section, a quick recovery operation can be realized.

In addition, by inputting the classification switch provided around the work classification being performed on site to the switch limitation means by type information or individual information, the classification switch in operation can be defined as an operation prohibited switch. In addition, since the partition switch in operation can be reliably excluded from the partition switch operated based on the accommodation calculation result, accidents in which the power distribution section in operation is charged by mistake can be prevented.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings.

FIG. 1 shows a configuration example of a main part of an operating device for an electric power system according to the present invention. The same parts as those in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. Describe.

That is, FIG. 1 shows the interchange power transmission operation unit CONT in FIG.
The switch limiting means 1A that excludes the predetermined section switch in the above-mentioned power distribution system from the target of the interchange calculation by the designation from the operator desk, and the interchange power transmission from another healthy distribution line to the interchanged section. When you go and restore the power failure section,
The interchange calculation is performed for the remaining segment switches other than the segment switches excluded by the switch limitation means 1A, and the operation command of the segment switches based on the result of the interchange calculation is issued to the teleconverter master station TC ₀ . It is configured by including the interchange power transmission means 1B that is transmitted via the above. Further, reference numeral 2 is a storage device for storing the sectional switch excluded by the switch limiting means 1A. Note that, here, the designation of the segment switches to be excluded from the object of the accommodation calculation is, for example, "all segment switches without a remote control function that cannot be remotely controlled (hereinafter referred to as a manual switch)" or "individual switch". "Vessel" etc. can be arbitrarily specified.

FIG. 2 shows an example of how to hold the information of each partition switch in the storage device 2 described above. In this example, the presence or absence of the interchange calculation exclusion and the remote control enable / disable classification for each partition switch. Have information

Next, the operation of the operating device for the electric power system configured as described above will be described with reference to the flowcharts shown in FIGS. 4 is a flow chart showing the function of the switch limiting means 1A, and FIG. 5 is a flow chart showing the function of the interchange power transmission means 1B.

First, in FIG. 4, in step ST1, it is determined whether the classification switches specified by the desk Desk and excluded from the objects of the accommodation calculation are collectively set or individually set. As a result of the determination in step ST1, if it is determined that the setting is batch
In step ST2, the setting type is determined. If the result of determination in step ST2 is that it is a manual setting, all the manual switches are identified in step ST3, and if it is determined that it is a work setting, all the switches in operation are identified in step ST4. If it is determined that the switch is neither manual setting nor work setting, the switch is identified by a type other than the manual switch and the switch in operation in step ST5. If the result of determination in step ST1 is that individual settings have been made, the switch specified in step ST6 is identified.

Next, in step ST7, the above steps ST3 to ST
The presence or absence of the interchange calculation exclusion of the switch identified by any of 6 is judged. If it is determined in step ST7 that the interchange calculation is excluded, all the identified switches are excluded in step ST8, and the result is stored in the storage device 2 in step ST10. Incidentally, the above-mentioned step ST7
If it is determined that the flexible calculation is not excluded, the step
In ST9, all identified switches are not excluded, and step ST1
At 0, the result is stored in the storage device 2. As described above, the processing by the switch limiting means 1A is completed.

Next, when a system fault occurs, the interchange power transmission means 1B starts, and in FIG. 5, the switching status signal of the switch based on online, the connection information between the section switch and the distribution section, the reserve capacity of the distribution line, and the preset The flexible calculation is performed based on the information such as the size of the section load. That is, first step
In ST11, search for open / closed switches adjacent to the concession section. Next, in step ST12, the switches detected in step ST11 are searched for those with flexibility calculation exclusion. Then, in step ST13, it is determined whether or not a flexible calculation exclusion is found, and if it is determined that the result of the determination is found, in step ST14, the result of step ST12 is excluded from the open / closed state of the exclusion state. Identify the vessel. If it is determined that the result is not found as a result of the determination in step ST13, step ST15
In step ST11, the switch detected in step ST11 is used as it is.

Next, in step ST16, the feeder to be interchanged is identified through the switch identified in step ST14 or step ST15. Then, in step ST17, the accommodation calculation is performed based on the feeder identified in step ST16, and in step ST18, the solution of the accommodation calculation is output as the optimum solution. As described above, the processing by the interchange power transmission means 1A is completed.

Next, the content of the above-mentioned processing will be specifically described with reference to FIG. It should be noted that FIG. 3 shows an example of a system configuration for explaining the operation in the same embodiment, and is the same as the above-mentioned eighth example.
The system configuration example is the same as that in the figure, but SW ₁ , SW ₂ , SW ₄ ,
SW ₆ is a distantly controllable section switch, or S marked with
W is a manual switch.

In the distribution system shown in FIG. ₃ , in order to restore the distribution section groups K ₁ , K ₂ and K ₃ , if the accommodation calculation is performed as in the conventional method described above, the accommodations from all the feeders F ₁ , F ₂ and F ₃ are performed. The procedure to be performed is often created (F ₁ and F _{2 in} this example).

On the other hand, in the embodiment described above, the sectional switch
Since SW ₅ is a manual switch, if it is assumed that the switch limiter 1A has previously designated the interchange calculation exclusion, when the interchange power transmitter 1B performs the interchange calculation, first, the above-mentioned Table 4 is used. Pattern that uses a ₂ as shown in ~, ~
Are excluded from the target. Next, since the sectional switch SW ₃ is also a manual switch, if it is assumed that the switch limiting means 1A similarly specifies that the interchange calculation is excluded, in order to perform the interchange power transmission to the power failure section K ₂ . , Feeder F ₁ is interchanged through the division switch SW ₄ , SW ₁ , or feeder F 1
_Although there are two patterns that can be accommodated through the division switches SW ₆ , SW ₂ , and SW _{1 according} to 3), the patterns 16 and 16 are excluded from Table 5 above, and the pattern 16 Is the optimum solution, and the flexible procedure is created without using the segment switches SW ₅ and SW ₃ .

In the above description, the flexible operation when an accident occurs in the power distribution system has been described, but the present invention is not limited to the above-described embodiment, and when an operator cuts the power distribution section of a certain distribution line to work power failure. It can also be applied in the same way when the distribution line is overloaded. In the former case, the interchange power transmission operation unit CONT may have a function of determining the concession section based on the work power outage command from the operator. In the latter case, the automatic detection of overload,
It may have a function of determining the section to be separated.

Further, the gist of the present invention is to provide a switch limiting means for excluding a predetermined section switch in the distribution system from the object of the accommodation calculation, and by setting various kinds of the section switches, the "solution" output from the accommodation calculation can be obtained. Since the purpose is to control arbitrarily, the invention can be variously modified and implemented without changing the gist.

[Effects of the Invention] As described above, according to the present invention, a predetermined segment switch in the distribution system is excluded from the target of the flexibility calculation, so that the pattern to be evaluated can be significantly reduced and the flexibility calculation can be performed. The processing time can be shortened. As a result, it is possible to fully recover the power failure section due to an accident or the like and reliably perform it in a short time.

Further, according to the present invention, since the operation prohibiting switch excluded from the target of the accommodation calculation is designated by the type information or the individual information, the distant control switch or the circling switch of the working section cannot be controlled remotely. Etc. can be specified collectively as operation prohibited switches based on the type information, and classification switches that you want to specify individually, such as a malfunctioning classified switch, can be individually specified as operation prohibited switches according to the type information. Therefore, it is possible to efficiently perform the work of designating the operation prohibited switch.

Further, according to the present invention, since it is possible to specify a section switch that cannot be remotely controlled as an operation prohibition switch, it is possible to restore a power failure section by excluding a section switch that cannot be remotely controlled from the accommodation calculation. Human intervention such as manual operation of the compartment switch can be eliminated, and quick recovery operation can be realized.

Further, according to the present invention, since the partition switch around the working section can be defined as the operation prohibition switch, the partition switch in operation from the partition switch operated based on the interchange calculation result can be reliably operated. This can be excluded and accidents that accidentally charge the power distribution section during work can be prevented.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of the present invention, and FIG.
FIG. 4 is a diagram showing an example of how to hold information of each partition switch in the storage device in the same embodiment, FIG. 3 is a system configuration diagram for explaining the operation in the same embodiment, and FIG. 4 is the same embodiment. A flow chart for explaining the function of the switch limiting means in FIG.
FIG. 5 is a flow chart for explaining the function of the power transmission interchange means in the embodiment, FIG. 6 is a system conceptual diagram of a power system operating device according to the prior art and the present invention, and FIG. 7 is a system configuration diagram at the time of soundness. FIG. 8 is a system configuration diagram at the time of power failure, and FIG. 9 is a system configuration diagram at the time of successful interchange power transmission. F ₁ ~F _5, Fx ...... distribution line, K ₁ ~K ₆ ...... distribution leg, TC _0, TC ₁ ~
TC ₃ …… Signal transmission device, KB …… Monitor panel, CONT …… Interchange power transmission operation device, Desk …… Operation console, 1 …… Transmission power transmission operation device, 1B
...... Interchangeable power transmission means, 1A ...... Switch limiter means, 2 ...... Memory device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Suzuki Hiroshi Suzuki, Fuchu City, Tokyo 1st location, Toshiba Fuchu factory (72) Inventor Seiji Higashi, Fuchu city, Tokyo 1st location, Toshiba Fuchu factory ( 56) References JP-A-56-53544 (JP, A)

Claims (6)

[Claims] 1. A switching status signal of a feeder circuit breaker of a distribution system, a switching status signal of a classification switch that divides a distribution line into a plurality of sections or interconnects distribution lines, a load current signal of each distribution line, and When a fault occurs in the distribution section, the section load signal that is set or taken online via the distant monitoring control device and the connection information indicating how the distribution sections are connected to each other are used to detect and detect the accident section. Type information or individual information input from the outside in the operating device of the power system that determines the concession section and operates the section switch necessary for accommodating power transmission from other distribution lines to this concession section. Based on the above, the switch limiter that determines the operation prohibited switches that should be excluded from the interchange calculation among the classified switches provided in the distribution system, and the When the communication section is determined, the accommodation calculation is performed based on the section switch excluding the operation prohibition switch from the section switch provided between the concession section and the distribution line adjacent thereto. An operating device for an electric power system, comprising: an interchange power transmitting means. 2. The switch limiter is a classification switch which has no remote control function and cannot be controlled remotely, or a classification switch provided around a work section in operation on site is input as the classification information. An operating device for an electric power system according to claim (1). 3. A switching status signal of a feeder breaker of a distribution system, a switching status signal of a classification switch that divides a distribution line into a plurality of sections or interconnects distribution lines, a load current signal of each distribution line, in advance. When a power outage command is issued for an arbitrary power distribution section using the section load signal that is set or taken online via the remote monitoring and control device, and connection information that indicates how the distribution sections are connected to each other, In the operating device of the power system that determines the concession section based on this, and operates the section switch necessary for performing concession transmission from other distribution lines to this concession section, type information input from the outside or Based on the individual information, the switch limiter that determines the operation prohibited switch that should be excluded from the interchange calculation among the classified switches provided in the distribution system, and the When the concession section is determined, the accommodation calculation is performed based on the section switch excluding the operation prohibition switch from the section switch provided between the concession section and the distribution line adjacent thereto. An operating device for an electric power system, comprising: 4. The switch limiting means is input as the classification information as a classification switch which has no remote control function and cannot be controlled remotely, or a classification switch provided around a work section being worked on site. An operating device for an electric power system according to claim (3), characterized in that. 5. An open / closed state signal of a feeder breaker of a distribution system, an open / closed state signal of a divisional switch that divides a distribution line into a plurality of sections or interconnects distribution lines, a load current signal of each distribution line, in advance. Distribution that should be disconnected by detecting the overload that has occurred on the distribution line using the section load signal that is set or taken online via the remote monitoring and control device and the connection information that shows how the distribution sections are connected to each other. Based on the type information or individual information input from the outside, in the operating device of the power system that determines the section and operates the section switch necessary for interchange power transmission from other distribution lines to this distribution section. A switch limiter that defines operation prohibited switches that should be excluded from the interchange calculation among the segmented switches provided in the distribution system, and a switch that should be disconnected when an overload generated on the distribution line is detected. When the section is determined, the interchange power transmission means for performing accommodation calculation based on the section switch excluding the operation prohibition switch from the section switch provided between the power distribution section and the distribution line adjacent thereto. An operating device for a power system, comprising: 6. The switch limiting means is input with a classification switch that has no remote control function and cannot be controlled remotely, or a classification switch provided around a work section that is working on site as the classification information. An operating device for an electric power system according to claim (5), characterized in that.