JP2645003B2 - Distribution system operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention performs a switching operation of a switch required for power interchange accompanying a power outage and power restoration of a distribution line in a distribution system. The present invention relates to an operation device for a distribution system.

(Prior Art) The prior art will be described with reference to FIGS. 3, 4, and 5. FIG.

In FIG. 3, SS is a distribution substation, which usually includes a transformer TR, and leads out a distribution line F from a bus BUS via a feeder 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 configured to be 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 section), and CM is a feeder current measuring device.
Output signals of these current measuring devices and feeder breaker CB
And on-off state signal section switch SW or the like, remote monitor control device constituting the signal transmission device (hereinafter, referred to as tele) the slave station _{TC 1, TC 2, TC 3} ... and Tele master station TC ₀ of It is input to the monitoring panel KB and the operation device (hereinafter referred to as operation device) CPU of the power distribution system in the control center via the control center. The monitoring panel KB displays the current switch state and feeder current of the distribution system,
The operating device CPU stores online information obtained from the signal transmission device in its memory unit, and also stores a section load current value scheduled for each distribution section, for example, K ₁ , K ₂ , K ₃ ,. I have.

On the other hand, the console OP is a man-machine interface device for instructing the operation device CPU to issue an operation command for a specific switch, a work power failure operation command, and the like.

Here, the switch SW uses a no-voltage open type automatic switch to facilitate detection of the fault category at the time of distribution line fault, and a time-sequential feeding device is provided for each switch. With the function of the time-sequential forwarding device, a recovery operation at the time of power failure and power recovery is performed. The function of the time-sequential feeding device is that the switch is turned on after a certain time (X hours) under the condition that there is a voltage on the power supply side and a power failure on the load side, and then within a certain time (Y time) Locks out if power fails. Then, even if the conditions of the voltage on the power supply side and the power failure on the load side are satisfied again, the "ON" control of the switch is not performed again.

In addition to the recovery operation by the timed progressive device described above, each of the tele conversion slave stations TC via telecontrol master station TC ₀ from the operating device CPU
_2, the distal control function for sequentially selecting control TC _3, are possible recovery operations at the time of power failure power recovery by the general be used together timed progressive function and far control function, the overall power distribution system management system reliability Has been improved.

Next, referring to FIG. 4 and FIG. 5, a switching operation procedure for a healthy section on the load side when a distribution line accident occurs, or a switching operation procedure for a section existing on the load side from the work blackout section when a work blackout is performed (beforehand). The switching calculation for obtaining the switching procedure will be described.

Here, the interchange calculation refers to a state of one or more blackout sections and a wiring system (information indicating connection between a section switch and a section, that is, connected to both ends of a power distribution section under given constraints. Based on the information on which of the segmented switches is the starting end and which is the end, the switching status signal of the switch, the current of the transformer and the distribution line, and the load current of each distribution section) This refers to the calculation for finding the optimal switch operation procedure (optimum solution) that matches the objective function in order to perform power transmission and transmission for the group of power interruption sections that are the target of the power transmission and transmission.

Note that the objective function refers to, for example, minimizing a supply hindrance, averaging the reserve capacity of each distribution line after the interchange and transmission.

This will be described with reference to a distribution system diagram. FIG. 4 shows a state in a healthy state, in which K ₁ , K ₂ , and K ₃ are notable power distribution sections that will later become power failure sections. SS ₁ , SS ₂ , SS ₃ … SS _X
A power distribution substation, feeder breakers CB _1, CB _2, CB ₃
The distribution lines F ₁ , F ₂ , F ₃ ... F _X are derived via CB _X.
Distribution leg group note K _1, K _2, K ₃ are transmission from all distribution lines F _X, the distribution line F ₁ adjacent thereto distribution leg group,
The reserves of F ₂ and F ₃ are F ₁ : 50 [A], F ₂ : 60 [A], and F ₃ : 10, respectively.
Assume [A].

In the figure, a switch symbol shown in a black circle indicates an ON state, and a switch symbol shown in a white circle indicates an OFF state.

In the state of this FIG. 4, the distribution leg K _X of the distribution line F _X as power failure for work, SW _X, if you turn off the CB _X, distribution leg K ₁ ~K ₃ as shown in Figure 5 Until the blackout. This task blackout other blackout section group (hereinafter, referred to as blackout interval) K ₁ ~K ₃ sections load magnitude (K _1: 30
[A], K ₂ : 20 [A], K ₃ : 10 [A]), and reserve capacity (F ₁ : 50 [A], F ₂ : 60) of distribution lines adjacent to these distribution section groups.
_{[A], F 3: 10} [A]), performing switch SW ₁ ~SW _2, SW ₄ ~SW flexibility calculated based on the state signals of the _6.

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

First, hit the start the interchange calculation to blackout interval K ₁ ~K _3, switch SW ₁ to S which may be connected directly to the power failure section group K ₁ ~K ₃
W ₆ is virtually all turned off.

Next, arrange the power failure section group K ₁ ~K ₃ in ascending order of segment loading (Table 1).

Then, assuming that the distribution lines F _{1 to} F ₃ have transmitted power to the blackout section groups K _{1 to} K _{3 using} only the magnitude of the section load as a determining factor ignoring the actual connection state of the distribution sections, distribution line F ₁ to F ₃ determines whether it transmission until the number of number of sections. Table 2 shows the result of this determination.

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

Where 0 ≦ a ₁ ≦ a ₁ max 0 ≦ a ₂ ≦ a ₂ max 0 ≦ a ₃ ≦ a ₃ max From Table 3, for each combination of a ₁ , a ₂ , and a ₃ , the constraints on the connection of the system and the total load of the section to be interchanged indicate the reserve capacity of the interchange-side distribution lines F _{1 to} F _3. The interchange section is determined within the range not exceeding. The combination of the determined accommodation sections is shown in a pattern (Table 4).

Of the Table 4, the pattern ,, and as, is not a practical solution if one section K ₁ ~K ₃ is to be flexible transmission simultaneously from two distribution lines, the calculation subsequent marked * Excludes this.

Then, each pattern (minimization of example supply trouble, optimization Hitoshitaira degree K _P of reserve capacity of each distribution line after interchange) the objective function to evaluate the whether they meet the. Indices for evaluation are as shown in Table 5.

Incidentally, the Hitoshitaira degree K _P is determined from the following equation.

Here, Fi _YB is the reserve capacity of the distribution line i after the flexible transmission, and N is the number of the flexible distribution lines. K _P is completely averaged at 1.

As can be seen from Table 5, the supply hindrance minimum of two objective functions the objective function of the first priority, the Hitoshitairado K _P second
When the objective function of the order is used, the pattern becomes the optimal solution.

As a result, the reserve after the interchange operation procedure
F ₁ : 20 [A], F ₂ : 30 [A], F ₃ : 10 [A].

Although the example of FIG. 5 is an extremely simple distribution system, there are 17 patterns to be evaluated as described above. When trying to find the optimal solution in a real system, it is necessary to evaluate hundreds of thousands to millions of patterns due to the complicated distribution system,
It is impossible for an operator to make this assessment,
Also, storing all of the above several hundred thousand to several million patterns in the memory is not practical because the memory capacity increases, and in actuality, each time a pattern is generated, it is compared with the solution obtained last time, Try to keep the smaller flatness pattern.

(Problems to be Solved by the Invention) However, when the conventional operating device CPU obtains the pre-switching operation procedure at the time of a work power failure using the above-mentioned accommodation calculation, the obtained accommodation procedure has the following problems.

While implementing the interchange procedure using a teleconverter,
For example, when a telecon fault occurs and the remote control function stops functioning or the operating device CPU stops, the timed sequential transfer function functions and a loop state occurs or an overload state occurs. Operation will be hindered.

The present invention has been made in order to solve the above-mentioned problem, and in the event that a telecon fault occurs during the execution of the interchange procedure or the operation device CPU stops, the timed sequential forwarding function does not function. It is an object of the present invention to provide a distribution system operation device that automatically calculates and operates a simple operation procedure.

[Structure of the Invention] (Means for Solving the Problems) Explained with reference to FIG. 1, according to the present invention, since a work section is set, a flexibility calculation means 11 for determining a flexibility operation procedure of a load-side section; An operation procedure recalculating means 12 for creating a provisional system state after the accommodation based on the accommodation operation procedure and creating an accommodation operation procedure for actual operation, and outputting a control signal for executing the accommodation operation procedure And an operation procedure executing means 13 for performing the operation.

(Operation) First, a work blackout section is set on the console OP. Receiving this, the accommodation calculating means 11 executes accommodation calculation with the section on the load side from the work power interruption section as the object of accommodation, and obtains an accommodation procedure. Based on this accommodation procedure, the operation procedure recalculation means 12
Create a provisional system after the interchange, and group it into units of the interchange route, create an operation procedure for each of the grouped interchange routes, and add a lock procedure to prevent the timed sequential forwarding function. The operation procedure is rearranged so as to be reverse power transmission and output.

(Example) Hereinafter, an example is described with reference to drawings.

FIG. 1 is a functional block diagram of an embodiment of an operation device CPU of a distribution system according to the present invention.

In FIG. 1, the operation device CPU of the distribution system is an operation console O.
When a work blackout section is set by P, a flexibility calculation means 11 for performing calculations for power flexibility based on online information and information stored in advance, and an operation procedure recalculation means 12
If, it constitutes a control signal in order to perform the operating procedure created from the operating procedure execution unit 13 for sending to the telecontrol master station TC ₀ at this operating procedure recalculation unit 12.

The operation procedure re-calculating means 12 is provided by the flexible calculating means.
Based on the result of the accommodating calculation by step 11, create a provisional system after the accommodating operation, divide the group into units of accommodating routes based on the tentative system, create an operating procedure for each of the accommodating accommodating routes, and perform the operation. A lock procedure for preventing a timed sequential transmission function is added to the procedure, and the operation procedure is rearranged so as to be reverse power transmission.

The operation of the power distribution system operating device configured as described above will be described below.

By setting the work blackout section from the console OP, the operating device CPU executes the interchange calculation with the interchange calculation means 11 for the section on the load side from the work blackout section as the object of interchange, as in the prior art, and executes the interchange procedure. Ask.

The operating device CPU creates a provisional system after the execution of the accommodation procedure based on the accommodation procedure obtained by the accommodation calculation means 11, and divides the temporary system into groups for each accommodation route. However, as a result of grouping, if the distribution sections belong to different distribution lines belonging to the standard system, the groups are further grouped.

Here, the standard system is an operation mode of a normal distribution system, and is a target system at the time of system switchback work (work after restoration from an accident or work after a power failure).

An example of grouping for each accommodation route will be described with reference to FIG.

FIG. 2 is a tentative system diagram assuming that the accommodating operation has been performed, and the system state before executing the accommodating operation is a section C ₁ , C ₂ , C ₃ , which is supplying power from the distribution line F ₂ . Sections C ₇ , C ₈ , C ₉ , C ₁₀ , C _{11 where} power is supplied from C ₄ , C ₅ , C ₆ and distribution line F ₃
Are in a power outage state.

That is, the switch _{SW 1, SW 2, SW 3} , SW 4, SW 5, SW 6, SW 7, S
_{W 8, SW 9, SW 10} , SW 11, SW 12, SW 13, SW 14 and power distribution lines
The state of the CB of F ₂ and F ₃ is off.

Here, the flexible section is C ₁ -C _11, interconnection switch SW
Are flexible by _{10, SW 11, SW 12,} SW 13, SW 14. From the distribution line F ₁ is the root segment C ₃ of the switch _{SW 10, C 4, C 5} ,
C ₁ and C ₂ are further provided, and C ₇ and C ₈ are provided in the route of the switch SW ₁₂ , and a section C ₆ is provided in the route of the switch SW ₁₁ .

Here, the section _{C 1 ~C 5, C 7,} C 8 when belonging distribution curve of standard strains, again grouped to different between distribution line F ₂ and distribution lines F _4. Table 6 is obtained by grouping all the accommodation routes.

A procedure is created in the following manner for each group of accommodation route groups. First, an "on" control procedure for a switch serving as an interchange point is created first. This is to create a switch “on” control procedure that connects the power transmission side section and the section to be interchanged (interconnection point section).

Next, the "on" control procedure of the switch other than the interchange point, from the link point section, create an "on" control procedure of the switch that accommodates the accommodated section belonging to the time load side of the standard system, In the case of the standard system from the link point section, a switch ON control procedure for accommodating a section belonging to the power supply side is created.

Table 7 shows the procedure of the accommodating route group 1.

Further, in order to prevent the automatic closing by the timed sequential forwarding function in consideration of the timed sequential forwarding function, a lock procedure of the switch is added. This is performed in the case of the standard system, when the sections to be interchanged are divided into different interchange route groups with the automatic switch interposed therebetween. There is no loop state because there is no automatic input. The interchange route groups that require this additional switch lock procedure are Group 2,
They are Group 4 and Group 5, and the procedures for each group are shown in Tables 8-1, 8-2 and 8-3.

In the case of the standard system, the procedure created for each accommodation route group is rearranged in the order of the group belonging to the lower order.
By this rearrangement, the switch lock procedure added when creating a procedure for each accommodation route group will precede the charging procedure for the higher-ranking section of the standard system, ensuring that the switch is automatically turned on by the time-sequential forwarding function. It is possible to prevent.

 The accommodating procedure thus obtained is shown in Table 9.

* Note * In a normal section switch, if the switch is turned off for the switch in the off (off) state, the timed sequential forwarding function is locked.

Here, the operating device CPU obtains the accommodating operation procedure table 9 by the accommodating operation procedure re-calculating means 12, and sequentially sends a control signal to the switch via the transmission device according to the accommodating operation procedure.

[Effects of the Invention] As described above, according to the present invention, it is possible to automatically calculate and operate a flexible operation procedure in consideration of the timed sequential forwarding function. Even when the control function is defective, it is possible to provide a distribution system operation device with high reliability and stability.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a distribution system operating device according to the present invention, and FIG. 2 is a distribution system operating device in the embodiment.
FIG. 3 is a functional block diagram of the conventional device, FIG. 4 is a diagram showing an operation state of the conventional device, and FIG. 5 is a configuration diagram at the time of a power failure in the power distribution system. DESCRIPTION OF SYMBOLS 1 ... Operation device of distribution system, 11 ... Accuracy calculation means 12 ... Operation procedure recalculation means 13 ... Operation procedure execution means

Continuing on the front page (72) Inventor Akira Takahashi 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu factory (72) Inventor Hiroshi Suzuki 1 Toshiba-cho, Fuchu-shi, Tokyo 1 Inside Toshiba Fuchu factory (56) Reference Document JP-A-54-129445 (JP, A) JP-A-61-258629 (JP, A) JP-A-58-63030 (JP, A) JP-A-56-53544 (JP, A)

Claims (1)

(57) [Claims] An open / closed state signal of a feeder breaker of a power distribution system, a open / closed state signal of a divided switch for dividing a distribution line into a plurality of sections and interconnecting distribution lines, a load current signal of each distribution line, Operate the power distribution system using signals such as load current signals that are set or taken online using the remote monitoring and control device, and connection information that indicates how the distribution sections are connected to each other. In the operation device of the power distribution system, a work interruption section is set, and based on the online information and the information stored in advance, a section on the load side from the work interruption section is subjected to the accommodation calculation, and the accommodation operation procedure is performed. And a provisional system after the execution of the accommodation procedure is created based on the accommodation procedure obtained by the accommodation operation means 11. Loop divided, the flexibility every route that the grouping, the procedure "ON" operation flexibility point switch for connecting the transmission-side section and the flexible section (linked point interval)
Create an `` on '' operation procedure of switches other than the interchange point switch, and a timed sequential function lock procedure for preventing a switch located between different interchange routes from being automatically turned on by a timed sequential function,
Further, an operation procedure re-computing means 12 for rearranging the operation procedure created in this way so as to be reverse power transmission, and an operation of outputting a control signal to execute the operation procedure created by the operation procedure re-computation means 12 An operation device for a distribution system, comprising: a procedure execution unit 13.