JPS62254621A - Power system operating apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an operating device for a power system, and particularly when performing flexible power transmission from an arbitrary power outage section or a fixed outage section or other unfeasible power distribution line. The present invention relates to a power system operating device that prevents overloading of power transmission lines.

[Technical Background of the Invention] A conventional device of this type will be explained based on FIG. 6th
In the figure, SS is a distribution substation, usually a transformer TR
Equipped with a feeder (distribution line) from the bus line BUS 1tJ
Distribution line F is derived via i@cB. This distribution line F is divided into distribution sections, . On the other hand, CT
CM is a current transformer for detecting the feeder Tri current (current at the distribution line lead-out portion), and CM is a feeder current measuring device. The output signals of these current measuring devices and the switching state signals of switches such as feeder breaker CB and section switch SW are transmitted to teleconverter slave stations TC1°Te3, Te3 that constitute the signal transmission device.
. . . and is panned to the monitoring panel KB and the flexible power transmission operator C0NT in the control center via the teleconverter master station TCa. The monitoring panel KB displays the current switch status of the distribution system,
Displays the feeder current, etc., and uses the flexible power transmission controller (electronic meter G1
The CONT (consisting of digital computing devices such as
, the section load voltage 'a value scheduled every 3 . . . is stored. Note that the section load current can be taken in as online information via a signal transmission device.

The function of the power transmission controller C0NT is to combine pre-stored information and online information when an accident occurs in the power distribution system, when an overload is detected, or when performing a work power outage based on operator instructions. 51 stops (hereinafter referred to as "accommodation calculation") for accommodative power transmission, and the calculation results are sent as a control signal to the switch via a signal transmission device. Note that Desk is an operation Φ for the operator to operate.

By the way, the above-mentioned flexibility zl calculation is based on the condition of one or more power outage sections and the distribution system (information indicating the connection between the sectional switch and the section, that is, the connection to both ends of a certain distribution section) under the given constraint conditions. information on which side of the sectional switch is the starting end and which is the ending end, the switching status signal of the switch, the current of the transformer and distribution line, and the load of each distribution section.
Based on the IB flow), the optimal switch operation procedure (optimal solution) that matches the objective function is used to perform interchange power transmission from a healthy distribution line to a group of outage sections connected to the corresponding interchange power transmission pair.
It is a calculation to find. B3, the objective function refers to, for example, minimizing supply disruptions, and averaging the reserve power of each distribution line after power interchange transmission.

Next, the function (accommodation calculation) of the conventional accommodating power transmission operating device C0NT will be explained with reference to a power distribution system diagram. Figure 7 shows the state during normal operation, and K1, K2, and 3 are notable power distribution sections that will later become power outage sections. SS1,88
2.833...

SSx is a distribution substation, and feeder circuit breakers CB1.
Distribution line FL via CB2, CB5-, CBX,
F2, l”3..., Fx are derived.The noteworthy power distribution section groups 1., 2, and 3 are all distribution 15, I
Fx, and these distribution section groups K1. to 2
, 3 adjacent distribution lines Fl, F2.

The reserve power of F3 is Fl: 50 [A].

Assume that F2: 60 [A] and F3: 10 [Δ]. In addition, in the figure, the symbol of the switch indicated by a black circle indicates an open state, and the symbol indicated by a white circle indicates an open state.

Now, in the state shown in Figure 7, B3 is distributing power! ! ; An accident has occurred in the distribution section group Kx of dFx, or the distribution line FX is overloaded, and the distribution section group Kt.

If power cannot be transmitted to K2 and K3 and the switch SWX is closed, the power will be transferred to the power distribution section Kr as shown in Fig. 8.

Suppose that K2, K3 all experience a power outage. Then, the accommodating power transmission controller C0NT indicates the power outage section f! TKt, K2.

The size of the section load of K3 is K1: 30 [A].

K2 : 20 [A], ni3 : 10 [A]), and the reserve capacity of the distribution lines adjacent to these distribution section groups (Fl : 5
0 [Δ], F2:60 [A], [3:10 [A]
), the interchange calculation is performed based on the status signals of the switches SWs to SW3, SW4 to SWs, but in the conventional interchange calculation, the system configuration of the distribution lines adjacent to the group of outage sections is not changed. , the current system @ even system is used for accommodating power transmission, and there is no need to worry about whether or not there is a reserve capacity, and the accommodating power is transmitted from a healthy distribution line that is judged to have a reserve capacity to a power outage section. Ta.

This flexibility calculation will be explained below using a table.

First, power outage section K1. In preparation for starting the calculation of accommodation for 2 and 3, power outage sections #Kt and K2.

Switches S W 1 to S W 6 that can be directly connected to K3
Virtually keep everything open. Next, the power outage section groups Kl, 2 and 3 are arranged in descending order of section load (Table 1).

1512L- Then, it is assumed that distribution lines F1 to F3 ignore the actual connection status between distribution sections and transmit power to power outage section group KL-3 using only the size of the section load as a determining factor. , each distribution line "1." to "3" determines the number of sections to which power can be transmitted.

Then, the given number of power outage sections is α) In this case α=3)
Then, using the formula α≧al +a2 +a3 =Σai, the combination U of the number of power transmission sections ai of each distribution line is determined, and this is shown in Table 3.

However, O≦a1≦a1 ma The total load of the interchange Zubegi section is the interchange side distribution line F*-F3.
The flexibility zone will be determined within a range that does not exceed the reserve capacity. This determined combination of flexible sections is shown as a pattern (
Table 4).

Furthermore, in Table 4, patterns ■, 0.0 and O,
If power from 1 to 3 is transmitted simultaneously from two distribution lines in one section, this is not before practical use, so it is marked as a red flag and excluded from subsequent calculations.

Next, each pattern is an objective function (e.g., minimizing supply disruptions, minimizing the evenness of reserve capacity KI3 of each distribution line after accommodation)
Evaluate whether or not it matches.

The indicators for evaluation are shown in Table 5. Incidentally, the degree of evenness Kp is obtained from the following formula.

Here, Five is the reserve power of the distribution line i after the power interchange transmission.

As seen from Table 5, the minimum supply hindrance of the two objective functions is set as the first priority objective function, and the average degree Kp is set as the second priority objective function.
When the objective function is set to 1, pattern O becomes the optimal solution.

Based on the above results of the interchange meter, the forecasting power of one interchange power transmission system is Fl: 20 [A] and F2: 30 [A], respectively.
A], F3: 10 [A] The flexible power transmission operating device C0NT outputs an operation command to the switches via the signal transmission device so as to close the switches SW3, SW4, and the switch SWs so that F3: 10 [A]. As shown in FIG. 9, the system configuration diagram at this time is such that power is interchangeably transmitted to the power distribution section Kt from the power distribution line F1, and to the power distribution sections 2 and 3 from the power distribution line F2.

Although the example J3 in FIG. 7 is an extremely pure power distribution system, there are 17 patterns to be evaluated as described above. When trying to find the optimal solution in an actual power system, it is necessary to evaluate hundreds of thousands to millions of patterns due to the complexity of the power distribution system, and it is impossible for an operator to perform this evaluation. It is not practical to store all 100,000 to several million patterns in memory because it increases the memory capacity.

In reality, when a pattern is generated, a pattern with a smaller levelness is left compared to the previously obtained solution.

[Problems with Background Art] However, conventional power system operating devices have the following problems. That is, as described above, the number of patterns to be evaluated becomes large, so the processing time of the flexible needle 4 becomes extremely long, resulting in a delay when urgent processing is performed. In addition, in order to remotely control the sectional switches of the distribution line, it is necessary to install a teleconverter slave station for each of the many sectional switches, and it is necessary to remotely control all the sectional switches. Since this is practically impossible due to cost constraints, normally only about 20% of the total r5K (the actual percentage varies somewhat depending on each field) can be controlled remotely. Therefore, when the above-mentioned method is used to calculate the flexibility, there is a very high possibility that a sectional switch that cannot be remotely controlled (without a remote control function) will be included in the created procedure.

In this case, in order to control the class V8 closure that does not have a remote control function, it is necessary for the worker Q to go to the site, which causes a delay when performing urgent processing. In a similar case, even in the case of an RR between sections that can be controlled remotely, work is being carried out on the condition of a power outage in the power distribution section being worked on site, so charging in this section could result in a serious accident.
Sectional switches around this section must not be remotely controlled, as this could result in personal injury or equipment damage.

As mentioned above, unconditionally implementing a flexible plan for all sectional switches often requires a lot of time to restore power outages due to accidents, etc. There is a problem in that it not only prolongs the process, but also increases the burden on the workers due to on-site work.

[Purpose of the Invention] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a system that enables restoration of the P7 electric section due to an accident etc. in an extremely short time and reliably. It is an object of the present invention to provide an economically advantageous and highly reliable power system operating device.

[Summary of the Invention] In order to achieve the above object, the present invention includes a switch limiting means for excluding a predetermined class 11i1 switch in the power distribution system from the target of the interchange calculation, and When restoring a power outage section by performing interchange power transmission from a distribution line, the interchange calculation is performed for the remaining section switches other than those excluded by the above-mentioned switch limitation means, and this interchange; By operating the sectional switch based on the results, the remote control function can be used and reused accurately, and the processing time for R calculations can be shortened, making it possible to perform emergency recovery operations. shall be.

[Embodiment 1 of the Invention] The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 1 shows an example of the configuration of main parts of an operating device for an electric power system according to the present invention. The same parts as in FIG. I will only describe it.

That is, FIG. 1 shows the flexible power transmission operating device C0 in FIG.
Switch limiting means 1Δ that excludes a predetermined section switch in the above-mentioned power distribution system from the target of the interchange calculation according to the specification from the NT during operation When performing interchange power transmission to restore a power outage section, perform interchange sub-σ for the remaining sections rrIw other than the section switches excluded by the switch limiting means 1A, and use the result of this interchange needle bar. This system is constructed in conjunction with a flexible power transmission means 1B that sends operation commands for the sectional switch based on the information via the teleconverter master station TCo.

Further, 2 is a storage device for storing the section switches excluded by the 1711rll device limiting means 1A.

Here, the classification WUm devices to be excluded from the scope of the flexibility calculation can be, for example, ``all sectional switches without remote control functions (hereinafter referred to as manual switches) that cannot be controlled remotely,'' or ``individual switches.'' Open r! 1N'' etc. can be arbitrarily specified.

FIG. 2 shows an example of how the information of each section switch is stored in the above-mentioned storage device 2, and in this example, whether or not the m-warm stones for each section are excluded from the calculation of flexibility.

It has information such as the classification of remote 1bll and all availability.

Next, the operation of the power system operating device constructed as described above will be described using the flowcharts shown in FIGS. 4 and 5. In addition, Fig. 4 shows the 1F11 ejector limiter limiter Ag)v
Fig. 5 is a flow diagram showing the functions of the flexible power transmission means 1B.

First, in FIG. 4, in step ST1, the operated vehicle [)es
Section t to be excluded from the flexibility calculation specified by k
! The Il device determines whether the setting is batch setting or individual setting. As a result of the determination in step ST1, if it is determined that the setting is batch setting, the setting type is determined in step ST2. As a result of the determination in step ST2, if it is determined that the setting is manual, the manual setting is performed in step ST3. J.J.
If all the switches are identified and it is determined that the work setting is set, all the Imril devices in operation are identified in step ST4, and further, if it is determined that the switch is not in either manual setting 1 or work setting, in step ST5 hand! Ilf
Identifies the switch by type outside the IM switch and the rM switch under operation. Incidentally, if it is determined as an individual setting as a result of the determination in step STI described above, the designated switch is identified in step ST6.

Next, in step ST7, it is determined whether or not the rMIWJ device identified in any one of steps ST3 to ST6 is to be excluded from the flexibility calculation. Step ST7
As a result of the determination, if it is determined that the flexibility calculation is excluded, all the identified switches are determined to be excluded in step ST8, and the result is stored in the storage device 2 in step 5TIO.

In addition, if it is determined as a result of the above-mentioned step ST7 that accommodation x1 Azusa is not excluded, all the identified switches are not excluded in step ST9, and the result is stored in the storage device 2 in step 5TIO. In the manner described above, the processing by the switch limiting means 1A is completed.

Next, as soon as a system decimal occurs, the flexible power transmission means 1B starts, and as shown in FIG. Flexibility calculations are performed based on information such as the size of the set section load. That is, first, in step 5T11, a search is made for an off-state switch adjacent to the accommodation section.

Next, in step ST12, among the switches detected in step STI 1, those with the exception of the power supply 1n are selected (
Nerdy. Then, in step 5T13, it is determined whether or not a flexible plan excluding the poem has been found, and if it is determined that it has been found, Sfufufu 8-14
Step 5T12 from the result of Sfufufu 8cho11 in
Identify switches that are in the off state, excluding the results of . Note that if it is determined that the determination result in step 5T13 is not found, step 5T1 is executed in step 5T15.
Use the switch detected in step 1 as is.

Next, in step 5T16, the above step 5T1
4 or identify the feeder that performs the accommodation through the m1 opener identified in step STI 5.

Then, in step ST17, a flexibility calculation is performed based on the feeder identified in step 5T16, and
In step 5T18, the solution for this flexibility total q is output as the optimal solution. In the manner described above, the processing by the flexible power transmission means 1A is completed.

Next, the contents of the above-mentioned processing will be specifically described using FIG. 3. Note that FIG. 3 shows an example of a system configuration for explaining the effect of J3 in the same embodiment, and is the same example of the system configuration as in FIG. 8 described above, except that SWr indicated by ◎,
SW2, SW4, SWs are remotely controllable divisions 11
1. The switch indicated by O or * is manual rM rJ]
Let it be B.

In the distribution system shown in Figure 3, there is a + in the distribution section.

In order to restore 3 to K2, feeders Ft and F2 are calculated as in the conventional method described above.

In many cases, a procedure is created to accommodate all F3 (in this example, Fr and F2).

On the other hand, in this embodiment described above, the sectional opening/closing 2
Since SSWs are manual switches, switch limiting means 1A
Assuming that the exclusion of the flexibility calculation sieve is specified in advance by
~0.0~0 are excluded from the target. Next, since the section switch SW3 is also a manual switch, assuming that the m1II device limiting means 1A specifies that the interchange is excluded, in order to perform interchange power transmission to 2 during the power outage section. is the section switch SW4 from the feeder F1.

There are two possible patterns: accommodating through 8W1, or accommodating through segment switches SWs, SW2, and SWt from feeder F3, but from Table 5 above, patterns ① to 0. Among O to 0 excluded, pattern 16 is the optimal solution based on the uniformity of pre-cooperation, and the sectional switch SW
s, the accommodation procedure will be created without using SW3.

In addition, although the above explanation has been about the accommodation operation when an accident occurs in the power distribution system, the present invention is not limited to the above-mentioned embodiment, and can also be used when an operator causes a power outage in a certain distribution section of a power distribution line. or.

This method can be similarly applied when an overload occurs on a power distribution line. In the former case, the flexible power transmission controller C
0NT only needs to have a function to determine the section to be accommodated based on a work power outage command from the operator, and in the latter case, OC has the function to automatically detect overload and determine the section to be disconnected. All you have to do is make it possible.

Further, the gist of the present invention is to provide a switch limiting means for excluding predetermined sectional switches in the power distribution system from the targets of 1 sieving, and to provide a solution output from the accommodating calculation by setting the sectional switches in various ways. Since the purpose of this invention is to arbitrarily control ``, it is possible to implement various modifications without changing the gist of the invention.

[Efficacy of invention Sl;! ] As explained above, according to the present invention, switch limiting means is provided to exclude a predetermined segment IrI switch in the power distribution system from the match of the accommodating section. When restoring a power outage section by carrying out interchange power transmission from the distribution line, the interchange total 4 is performed for the remaining section switches other than the section switches excluded by the above-mentioned switch limitation means, and the result of this interchange calculation is This is an economically advantageous and highly reliable power system operation device that can operate the sectional switch based on the system, and can restore power outage sections due to accidents, etc. in an extremely short time and reliably. can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration block diagram showing one embodiment of the present invention, and FIG.
The figure is a diagram showing an example of how information is held in each section 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 FIG. 5 is a flowchart for explaining the function of the power transmission accommodating means in the same embodiment, and FIG. FIG. 7 is a system configuration diagram of the system operating device, FIG. 7 is a system configuration diagram during a power outage, FIG. 8 is a system configuration diagram during a power outage, and FIG. 9 is a system configuration diagram when interchange power transmission is successful. F1 to Fs, FX... distribution line, K1- to 6... distribution section, TCa, TC1 to TC3... signal transmission device,
KB... Monitoring panel, C0NT... Compatible power transmission operator, [
] esk...operation console, 1...accommodative power transmission operator, 1A
...Accommodating power transmission means, 1B...Switch limiting means, 2.
··Storage device. Applicant's representative Patent attorney Takeshi Suzue α Figure 1 Figure 3 Figure 6 Figure 713! l

Claims (6)

[Claims] (1) Opening/closing status signals of feeder breakers in the distribution system, opening/closing status signals of section switches that divide distribution lines into multiple sections or connect distribution lines, load current signals of each distribution line, preset If an accident occurs in the distribution section, it can be detected by using the section load current signal captured online using a remote monitoring and control device, and connection information showing how the distribution sections are connected to each other. In a power system operation device that detects an accident section and determines the interchange section, and performs interchange power transmission from other distribution lines to this interchange section, a predetermined sectional switch is excluded from the scope of interchange calculation. When the interchange power is transmitted from another healthy distribution line to the interchangeable section, the remaining sectional switches other than the sectional switches excluded by the switch limiting means are targeted. 1. An operating device for an electric power system, characterized in that the sectional switch is operated based on the result of the flexibility calculation. (2) The switch limiting means is characterized in that sectional switches that cannot be remotely controlled (without a remote control function) or sectional switches that are being worked on site are excluded from the flexibility calculation. An operating device for a power system according to claim (1). (3) Opening/closing status signals of feeder circuit breakers in the distribution system, opening/closing status signals of section switches that divide distribution lines into multiple sections or connect distribution lines, load current signals of each distribution line, preset If a power outage is to be caused in any power distribution section, a work power outage command is issued using the section load current signal captured online using a remote monitoring and control device, and connection information showing how the distribution sections are connected to each other. In an operating device for a power system that determines the accommodating section based on the accommodating section and performs accommodating power transmission from other distribution lines to this accommodating section, a switching system that excludes a predetermined section switch from the target of the accommodating calculation. When the interchange power transmission is carried out from another healthy distribution line to the interchangeable section, the remaining section switches other than the section switches excluded by the switch limitation means are provided with interchange control means. An operating device for an electric power system, characterized in that it performs calculations and operates the sectional switch based on the result of the flexibility calculation. (4) The switch limiting means is characterized in that a sectional switch that cannot be remotely controlled (without a remote control function) or a sectional switch that is being worked on site is excluded from the flexibility calculation. An operating device for a power system according to claim (3). (5) Opening/closing status signals of feeder circuit breakers in the distribution system, opening/closing status signals of section switches that divide distribution lines into multiple sections or connect distribution lines, load current signals of each distribution line, preset If an overload occurs on a distribution line, the section load current signal captured online using a remote monitoring and control device, and the connection information showing how the distribution sections are connected to each other are used to detect the overload. In a power system operation device that determines a distribution section to be detected and disconnected and performs interchange power transmission from another distribution line to this distribution section, a predetermined sectional switch is excluded from the object of interchange calculation. When equipped with a switch limiting means and performing interchange power transmission from another healthy distribution line to the interchangeable section, the remaining sectional switches other than the sectional switches excluded by the switch limiting means are targeted. Perform flexibility calculations,
An operating device for an electric power system, characterized in that the sectional switch is operated based on the result of the flexibility calculation. (6) The switch limiting means is characterized in that a sectional switch that cannot be remotely controlled (without a remote control function) or a sectional switch that is being worked on site is excluded from the flexibility calculation. An operating device for a power system according to claim (5).