JPH061946B2 - Work power failure operation device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an improvement of a work power failure operating device for performing switching operation of switches required for power interchange due to work power failure of a distribution line of a power distribution system and power restoration. is there.

[Technical background of the invention] In recent years, a work power failure operating device has been adopted as a device for performing switch operation of a switch required for power interchange accompanying power failure and power recovery of a distribution line in a power distribution system. And
This type of conventional work power outage operation device is composed of a digital arithmetic processing device such as an electronic computer, and power outage and power recovery in a work section are carried out as follows.

(Work power outage) When the operator specifies a work section and a work stop from the operator console, the work power outage operation device performs power interchange calculation to eliminate the power outage section other than the work section, and based on the calculation result, the power distribution system A control signal for opening or closing is sent to the switch, and then the work section is operated for power failure.

(Power recovery) When the operator specifies the power recovery section and the end of work from the operator console, the work power outage control device sends an open or close control signal to the switch of the power distribution system to restore the original system. There is.

[Problems of Background Art] However, the above-described conventional work power failure operating device has the following problems. That is, since the switching operation of the power distribution system is performed at the time of work blackout, not only does it take a lot of time for the switching operation, but also when there is a point where power cannot be accommodated, an unplanned power failure point or work is required. I have to stop. Furthermore, since the system is returned to the original system even at the time of power recovery, the power recovery time will be delayed if there are multiple work sections at the same time.

[Object of the Invention] The present invention has been made to solve the above problems, and an object of the present invention is to reduce the time required for a power outage operation and the time required for power recovery, and to reduce power consumption. An object of the present invention is to provide a highly reliable work power outage operation device which does not need to stop an unscheduled power outage or work even if an inflexible place appears.

[Summary of the Invention] In order to achieve the above object, according to the present invention, a switch operation required for power interchange due to work power failure and power recovery of a distribution line of a distribution system is performed, and the state of the switch is Signal and feeder current signal are transmitted / controlled as online information, remote monitoring and control device, operation device that can set work interval and cutback system, and this operation device sets work interval before work is stopped. And an accommodation calculation means for performing calculation for power accommodation based on the online information and the previously stored information, and a pre-switching operation for creating a pre-switching operation procedure based on the result of the accommodation calculation by the accommodation calculation means. Procedure creation means, a power failure operator who creates a power failure operation procedure for power failure in the work section based on the procedure created by the advance switching operation procedure creation means A power recovery operation procedure creating means for creating a power recovery operation procedure for power recovery of a work section based on the power failure operation procedure creating means. Based on the setting content of the switching back system from the operating device, a switching back operation procedure creating means for creating a switching back operation procedure for switching back to the pre-working system or the original registration system, the operation command from the operating device Work consisting of operation procedure execution means for sending a control signal to the remote monitoring control device so as to execute a corresponding one of the pre-switching operation procedure, power outage operation procedure, power recovery operation procedure, and switchback operation procedure according to the content. It is configured with a power outage controller, performs pre-switching operation before starting work, executes power outage operation just before work, and restores power after work. Other is characterized in that so as to perform the switching back operation to domicile lineage.

The present invention divides a work stop into four operations of a pre-switching operation, a power outage operation, a power recovery operation, and a switchback operation, respectively creates these four operation procedures before the work stop, and outputs an operation command from the operation device. Accordingly, the above-mentioned pre-switching operation procedure, power outage operation procedure, power recovery operation procedure, and switchback operation procedure can be individually and temporally executed.

Embodiments of the Invention Hereinafter, one embodiment of the present invention based on the above will be described with reference to the drawings.

FIG. 1 shows a configuration example when the work power failure operating device according to the present invention is applied to a power distribution system. In FIG. 1, SS is a distribution substation, which is usually equipped with a transformer TR,
The distribution line F is derived from the bus BUS via a feeder (distribution line) breaker CB. This distribution line F is divided into distribution sections k ₁ , k ₂ , k ₃ ,
It is divided into ... and connected to other distribution lines. CT is a current transformer for detecting the feeder current (current of the distribution line lead-out portion), and CM is a feeder current measuring instrument. The output signals of these current measuring devices and the ON / OFF state signals of the switches such as the feeder breaker CB and the classification switch SW are remote monitoring and control devices (hereinafter referred to as teleconverters) constituting the signal transmission device, slave station TC ₁ , TC ₂ , TC
_3, ..., and is input to the monitoring panel KB and working blackout manipulator CONT control house via a telecontrol master station TC _0. The monitoring board KB displays the current switch condition of the power distribution system, the feeder current, etc., and the work power failure operation unit (comprised of a digital arithmetic processing unit such as a computer) CONT
Stores the online information obtained from the signal transmission device in its memory unit, and also distributes each power distribution section, for example, k ₁ , k ₂ ,
The section load current value scheduled for each k ₃ , ... Is stored. The section load current can also be taken in as online information via the signal transmission device.

On the other hand, the console Desk is capable of setting the working section and the switching back system, and the work power outage controller CONT indicates that the working section is set before the work is stopped by the Desk. Four operation procedures of switching operation, power failure operation, power recovery operation, and failback operation are created respectively, and these pre-switching operation procedures, power failure operation procedures, power recovery operation procedures, and switch operations are performed according to the operation commands from the operator desk. The operation of the return operation procedure is performed independently in terms of time.

FIG. 2 is a functional block diagram showing a configuration example of the work power outage operation unit CONT in FIG. That is,
As shown in FIG. 2, when the work section is set by the above-mentioned console Desk before the work is stopped, the work power cut operation unit CONT is provided for power interchange based on the online information and the information stored in advance. Flexible calculation means 1 for calculation
And a pre-switching operation procedure creating means 2 for creating a pre-switching operation procedure based on the result of the accommodation calculation by the accommodation calculating means 1, and a power interruption of the work section based on the creating means by the pre-switching operation procedure creating means 2. Power failure operation procedure creating means 3 for creating a power failure operation procedure for performing power recovery operation procedures, and a power recovery operation procedure for creating a power recovery operation procedure for recovering power in a work section based on the creating means by the power failure operation procedure creating means 3 Based on the creating means 4 and the creating means by the power recovery operating procedure creating means 4, a failback operation procedure for performing a failback to the pre-work system or the original control system according to the setting content of the switchback system from the console Desk. The fail-back operation procedure creating means 5 for creating the operation, the pre-switch operation procedure, the power failure operation procedure, the power recovery operation procedure, and the fail-back operation procedure according to the content of the operation command from the operator desk. A control signal in order to perform the Chino appropriate steps constituting the operation procedure matters means 6 for sending to said telecontrol master station TC _0.

Next, the operation of the work power failure operating device configured as described above will be described in detail.

The work power outage operation unit CONT performs the following processing based on an instruction (a work section, a recovery system after the work is completed, and an operation command) from the operator, which is given via the console Desk.

That is, first, at the time of instructing the work section and the restoration system (pre-work system or original system) after the work is completed, (a) information stored in advance by the accommodation calculation means 1 according to the flowchart shown in FIG. 3 (a). And online information, calculations for flexible transmission (below,
This is called flexible calculation. (B) The advance switching operation procedure creating means 2 creates the advance switching operation procedure based on the result of the accommodation calculation.

(c) The power failure operation procedure creating means 3 creates a power failure operation procedure for power failure in the work section.

(d) The power recovery operation procedure creation means 4 creates a power recovery operation procedure for power recovery of the work section.

(e) The switchback operation procedure creating means 5 creates a switchback operation procedure for switching back to the pre-work system or the original system.

Perform a series of processing. Hereinafter, such processing will be collectively referred to as creation of an operation procedure.

Next, operation commands (preliminary switching operation, power outage operation, power transmission operation,
3) (b) the flow chart shown in Fig. 3 (b), and (f) the pre-switching operation command, in accordance with the switching operation procedure created in (b) above, via the signal transmission device. Control signal to the switch.

(g) When a power failure operation command is issued, a control signal is sent to the switch via the signal transmission device according to the power failure operation procedure created in (c) above.

(h) When a power transmission operation command is issued, a control signal is sent to the switch via the signal transmission device in accordance with the power transmission operation procedure created in (d) above.

(i) When a switchback operation command is issued, a control signal is sent to the switch via the signal transmission device according to the switchback operation procedure created in (e) above.

The processing is executed by the operation procedure executing means 6. In this case, (f) to (i) are instructed at the following timing in operation.

・ Advance switching operation command… Available at any time before work is stopped ・ Power failure operation command ………… Just at work start time ・ Power recovery operation command ………… Just at work end time ・ Switchback operation command …… Available at any time after work ends (f) to (i) are collectively referred to as the execution of an operation procedure.

Next, details of the creation of the operation procedure and the execution of the operation procedure will be specifically described.

(Interchange calculation) One or more power outage sections, which are the given constraint conditions, 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 the distribution section is the start point) Based on the information about which is the end, the switching status signal of the switch, and the transformer's distribution line current, load current of each distribution section) This is a calculation to find the optimum switch operating procedure (optimal solution) that matches the objective function for the power transmission in the power failure section group. The objective function means, for example, minimizing supply disruption, averaging reserve capacity of each distribution line of the interchange power transmitter, and the like.

This will be described with reference to the distribution system diagram. FIG. 4 shows a state at the time of soundness, and K ₁ , K ₂ , and K ₃ are noteworthy distribution section groups that will later become power failure section groups. SS ₁ , S
S ₂ , SS ₃ ... SS _X are distribution substations, feeder breakers CB ₁ . Distribution lines F ₁ , F ₂ , F ₃ ... F _X are derived via CB ₂ , CB ₃ ... CB _X. All of the noteworthy distribution section groups K ₁ , K ₂ , and K ₃ are transmitted from the distribution line F _X, and the distribution lines F ₁ and F adjacent to these distribution section groups.
₂ and F ₃ have reserve forces of F ₁ : 50 [A] and F ₂ :
It is assumed that it is 60 [A] and F ₃ : 10 [A]. still,
In the figure, the symbol of the switch is shown with a black circle is in the ON state,
The white circles indicate the off state.

In the state of this FIG. 4, _SW X, if you turn off the CB _X, distribution leg _K 1 ~K ₃ as shown in Figure 5 the distribution leg _{K X} now distribution line _{F X} as power failure for work There will be a power outage. This task blackout other blackout section group (hereinafter, blackout interval referred _to) K 1 ~K ₃ sections load magnitude _{(K 1: 30 [A]} , K 2: 20 [A], K 3: 1
0 [A]), reserves of distribution lines adjacent to these distribution section groups (F ₁ : 50 [A], F ₂ : 60 [A], F ₃ : 10)
[A]), and the interchange calculation is performed based on the status signals of the switches SW _{1 to} SW ₂ and SE _{4 to} SW ₆ .

Hereinafter, this interchange calculation will be described using a table. First, when starting the flexibility calculation to blackout interval _K 1 ~K _3, the driving device S which may be connected directly to the power failure section group _K 1 ~K ₃
All of W _{1 to} SW ₆ are virtually turned off.

Next, the blackout section groups K _{1 to} K ₃ are arranged in order from the smallest section load. (Table 1) When 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 power failure section groups K _{1 to} K _{3 using} only the size of the section load as a determination factor, It is determined 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, in the case of each combination of a ₁ , a ₂ , and a ₃ , the constraint condition 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 through two distribution lines, it is marked as * and excluded from the subsequent calculations.

Next, each pattern is an objective function (for example, minimization of supply hindrance, minimization of flatness K _p of reserve capacity of each wire after interchange).
It is evaluated whether or not The indexes for evaluation are shown in Table 5. The uniformity K _P is calculated by the following formula.

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

As can be seen from Table 5, of the two objective functions, the smallest supply hindrance is the first-priority objective function, and the flatness K _P is the second objective function.
Pattern 12 is the optimal solution when the objective function of order is used.

As a result of the above, the reserve capacity after the interchange power transmission is F ₁ : 20 [A], F ₂ : 30 [A], F ₃ : 10, respectively.
It becomes [A].

Although the example of FIG. 4 is an extremely simple distribution system,
As described above, there are 17 patterns to be evaluated. When trying to find the optimum 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 have all 100,000 to several million patterns written in the memory because it increases the memory capacity. In reality, each time a pattern is generated, the pattern with the smaller averageness is compared to the previously obtained solution. I am trying to leave.

(Creation of Advance Switching Operation Procedure) Table 6 is obtained as the advance switching operation procedure based on the above-mentioned interchange calculation result.

(Creation of power outage operation procedure) Table 7 is required as an operation procedure of the switches at both ends in order to cause a power failure in the work section.

(Creation of power recovery operation procedure) Table 8 is obtained as an operation procedure reverse to the power failure operation in order to restore power to the work section.

(Creating a revertive operation procedure) There are two revertive operations: a revert to the original system (a system determined at the installation stage of the equipment) and a pre-operation system. Either depending on the instructions from
Call for one switchback procedure.

(1) Switch-back operation to the original system The switch-back procedure from the system after power recovery to the original system is calculated based on the stored contact information of the equipment.

(2) Switch-back operation to the pre-work system To obtain the pre-work system, Table 9 is obtained as the reverse operation procedure to the switching operation procedure.

(Execution of pre-switching operation procedure) In accordance with the pre-switching operation procedure obtained in Table 6, a control signal (open or closed) is sequentially sent to the starter via the transmission device. FIG. 6 shows a distribution system diagram after the execution of this pre-switching operation procedure.

(Execution of power failure operation procedure) In accordance with the power failure operation procedure obtained in Table 7, control signals (open or closed) are sequentially sent to the switches via the transmission device. FIG. 7 shows a power distribution system diagram after executing the power failure operation procedure.

(Execution of power transmission operation procedure) According to the power recovery operation procedure obtained in Table 8, a control signal (open or closed) is sequentially transmitted to the switches via the transmission device. A distribution system diagram after execution of this power transmission operation procedure is shown in FIG.

(Execution of switchback operation procedure) Taking the case of returning to the pre-work system as an example, a control signal (open or closed) is sent to the switch via the transmission device according to the switchback operation procedure obtained in Table 9. Upon completion of this operation, the pre-work system as shown in FIG. 4 is obtained.

By the above operation, it is possible to perform power failure and power recovery in the work section.

It should be noted that the present invention is not limited to the above-described embodiments, but can be modified in various ways without departing from the scope of the invention.

EFFECTS OF THE INVENTION As described above, according to the present invention, the time required for a power outage operation and the time required for power recovery can be shortened, and even when a portion where power cannot be accommodated appears. It is possible to provide an extremely reliable work power outage operation device that does not need to stop an unplanned power outage or work.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is a functional block diagram showing details of a work power failure operation unit CONT in the embodiment, FIGS. 3 (a) and 3 (b), FIG. 4 to FIG. FIG. 7 is a diagram for explaining the operation in the same embodiment. 1 ... accommodation calculation means, 2 ... advance switching operation procedure creation means, 3
… Power failure operation procedure creation means, 4… Power recovery operation procedure creation means,
5 ... switchback operation procedure creating means, 6 ... operation procedure executing means,
CONT ... work a power outage operating unit, Desk ... console, TC 0 _... teleconverter master station, _TC 1 ~TC 3 _... Telecom slave station.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazumi Moriyama No. 1 in Toshiba Fuchu factory, Fuchu-shi, Tokyo (72) Inventor Hiroshi Suzuki No. 1 Toshiba-machi in Fuchu, Tokyo Tokyo Fuchu factory, Ltd.

Claims (1)

[Claims] Claim: What is claimed is: 1. A switch for switching a switch, which is necessary for power interchange due to a work power failure and a power recovery of a distribution line of a distribution system, wherein the switch status signal and feeder current signal are transmitted / controlled as online information. A remote monitoring control device, an operating device capable of setting a working section and a switching-back system, and when the working section is set by the operating device before the work is stopped, the online information and previously stored information An accommodation calculation means for performing calculation for power accommodation based on the above, an advance switching operation procedure creation means for creating an advance switching operation procedure based on the result of the accommodation calculation by this accommodation operation means, and this advance switching operation procedure creation means A power failure operation procedure creating means for creating a power failure operation procedure for power failure in the work section based on the creation procedure, and this power failure operation procedure creating means. A power recovery operation procedure creating means for creating a power recovery operation procedure for power recovery of the work section based on the creating means, and setting of a failback system from the operating device based on the creation procedure by the power recovery operation procedure creating means A switchback operation procedure creating means for creating a switchback operation procedure for switching back to the pre-work system or the original system according to the content, the advance switching operation procedure according to the content of the operation command from the operation device, A power outage operation procedure, a power recovery operation procedure, and a work power outage operation apparatus comprising operation procedure execution means for sending a control signal to the remote monitoring control device so as to execute the corresponding procedure of the switchback operation procedure, Before the work starts, the pre-switching operation is executed, the power outage operation is executed immediately before the work, the power recovery operation is executed after the work, and the switchback operation to the pre-work system or the original system is executed. Work power failure operation apparatus according to claim that it has to.