JPS63316633A - System for automatic recovery from accident in power system - Google Patents

Abstract

PURPOSE:To prevent overload, by extracting ar operating switchgear through comparison between a pre-recovery operation system and a determined system then temporarily opening a switchgear which can not be extracted through aforementioned method according to a specific rule. CONSTITUTION:All switchgears which are closed before recovery operation and opened in determined system are extracted and stored in block 1. An operating sequence for temporarily opening a switchgear which is closed before recovery operation and connecting between a controlled system and a system out of control is prepared in block 2 and stored. Then a switchgear which is in pre-recovery operation system wile closed in determined system and at least one of the opposite end facilities is in charged condition is extracted in block 3 and stored. Thereafter, a switchgear for temporarily opening aforementioned switchgears and preventing transient overload is extracted in block 4. Then they are arranged in block 5 and the switchgears are driven in block 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to creating operating procedures for automatic recovery in the event of an accident in a power system.

This invention aims at restoring the power system when a power outage occurs due to an accident, and it is necessary to provide the system configuration immediately before starting the restoration operation, the old system before operation, and the actual restoration configuration. The target switch is extracted while comparing it with the decision system, and an operation command procedure for the target switch is automatically created so that the open/close state of the target switch matches the open/close state of the decision system. The purpose of this invention is to provide an automatic recovery system in the event of an accident in a power system that can automatically restore a power outage system.

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a flowchart for explaining a power system accident recovery method according to an embodiment of the present invention.
2 is a block for creating an opening operation procedure, 2 is a block for creating an opening operation procedure to temporarily disconnect a power system that is not under control, 3 is a block for opening/opening, 5 is a block for creating a closing operation procedure 3, and a block for creating a closing operation procedure Virtually perform each operation procedure of creation block 4
- A block for updating the charging/power-off state, and 6 a block for organizing the operation procedures created in the opening operation procedure creation block 1 to the closing operation procedure creation block 4, respectively.

The operation of each block will be explained based on the flowchart of the embodiment shown in FIG. Block 1 is a block that creates an opening operation procedure, and extracts all switches that are "closed" in the recovery operation oil system and "open" in the determination system as targets for opening operation, and creates an opening operation procedure. and memorize it. A specific example is shown in Figure 2. In the figure, ○ marks indicate closed switches, and ○ marks indicate closed state switches.
Each symbol represents an open switch, and will be explained using this symbol from now on. FIG. 2 (5) shows the restoration operation oil system, and FIG. 2 (g) shows the determination system. Switch CB1
Since it is in the "closed" state in FIG. 8 (8) and in the "open" state in FIG. Since the switch CB2 is in the "open" state in both FIG. 2) and FIG. 2(B), it is not extracted as a switch to be operated for opening.

When the extraction of all the switches to be opened is completed, the state of the recovery operating oil system of those switches is set to "open", and the next block 2 is activated.

Block 2 is under the jurisdiction of other power companies or other power supply stations, so it is necessary to use the recovery operating oil in the switch that connects the power system that is not under the control of the power system and the power system that is subject to automatic restoration in the event of an accident. Create and store an opening operation procedure for temporarily opening a switch in a "closed" state in the system. This prevents interference in automatic restoration in the event of an accident between the power system over which control authority does not extend and the power system to be automatically restored, and prevents the target system from being restored in a form different from the determined restoration form.

As a specific example, Fig. 3 shows an example of a power system in the state of a recovery operation oil system, where the part indicated by arrow A is the range within which the control authority extends, and the part indicated by arrow B is the range beyond the control authority. shall be. In the specific example of FIG. 3, switches CB6 and CH2 are extracted as switches to be temporarily opened.

Note that the closing operation procedure for returning the switch temporarily opened in block 2 to the "closed" state is created in the next block 3.

When extraction of all switches subject to temporary opening operation is completed, the status of the recovery operation oil system of those switches is set to "open",
Activate block 3.

Block 3 is a block for creating a closing operation procedure.The power system that is subject to automatic restoration after a power outage due to an accident is in a charging state unrelated to the accident, and the power system that is in a charging state during the restoration process Create a procedure for receiving power from the power system that is subject to restoration. In this block 3, among the switches that are in the "open" state in the restoration operation oil system and the "1 closed" state in the determination system, at least one of the equipment at both ends of the switch is in the charging state. All of them are extracted as switches to be closed, and a closing operation procedure is created and stored.

In addition, the status of the recovery operation oil system of the extracted switch was changed to 1.
state. Figure 4 (5), (B), (C1° (to),
@ indicates specific examples of various closing operations. Figure 4 (B).

(C1, (Di, @) is a specific example of closing the system marked with a diagonal line. Figure (b) shows how to receive power from the power transmission line equipment in the charging state to the busbar equipment in the power outage state. The same figure shows a specific example of closing the switch in order to ``close'' the switch (Q is a specific example of closing the switch 6'' in order to charge the power outage bus equipment from the bus equipment in the charging state. “Closing” the switch in order to charge the power-out transmission line equipment from the busbar equipment in the charging state
Further, Figure (G) shows a specific example of switching the switch to "1" in order to charge the secondary bus equipment during a power outage using the transformer equipment from the primary bus equipment that is currently charging. In the specific example of the gods, each switch CB1.(CB
2) is extracted as the switch to be closed.

After all the switches to be closed are extracted, proceed to the next block 4.
Start. Furthermore, if no switch to be operated for closing is extracted, block 6 is activated.

In block 4, in order to prevent a temporary overload that may occur by closing the switch to be operated in block 3, a switch to be temporarily opened is extracted.
Create and memorize the temporary opening operation procedure. The target switch to be temporarily opened is when the power outage bus is receiving power from the charged power transmission line in Figure 4 (b) shown as a specific example of block 3, and the switch is the same switch that is connected to the power outage bus. Bus tie switch of busbar in substation and charging 1 in specific example Figure 4 (G)
This is a bus tie switch for a secondary bus when a power outage secondary bus is charged using transformer equipment from the secondary bus. Specific examples of block 4 are shown in FIGS. 5(G) and 5(G), respectively.

The switch to be temporarily opened is switch CB1 (CB2) in each specific example, and the switch extracted as the target for closing operation in block 3 is switch CB3 (C
BS), CB4 (CBS).

In (5) of the same figure, when switch CB3 is closed, power transmission line equipment 2-1 is loaded with systems 3-1 and 3-2.
.

2-3 and 2-4 may all be connected, resulting in overload. For this reason, switch CB1. “Open” CB2 in advance
state, and when switch CB3 is in the “closed” state, system 3-2
, 2-3 are connected as loads,
The same applies to the example of the switch CB diagram (c), which prevents the occurrence of overload. Once all temporary opening operation procedures have been extracted, block 5 is activated. In block 5, the charging/power-off status of the equipment after executing the closing/opening operation procedures created in blocks 3 and 4 is updated. The equipment on the charging side when the closing operation procedure is executed and the equipment connected in the system before the restoration operation are detected by a known method and set as charging equipment. Once all are detected, start block 3 again.

Block 6 is a block that organizes the procedures stored in each block from blocks 1 to 4. In order to prevent connections between different power systems, the opening operation procedures of blocks 1 and 2.4 are organized first. , Next, the closing operation procedure of block 3 will be summarized. The method of arrangement will be determined by considering the order by voltage class, substation, etc.

As described above, according to the present invention, the system before restoration operation,
By comparing the target switch with the determined system and temporarily opening the switch that cannot be extracted using the above method according to a certain rule, overloads can be prevented and power systems that are not under control can be prevented. It is possible to realize an automatic recovery system in the event of an accident, which has the feature of being completely unaffected by this.

[Brief explanation of the drawing]

FIG. 1 is a flowchart illustrating an automatic recovery method in the event of an accident in a power system according to an embodiment of the present invention, and FIG.
, (g) are each specific example configuration diagram when extracting a switch to be opened in the same flowchart, and FIG. Specific example configuration diagrams for this case are shown in Figure 4 (5), (B), (C), and (D). (G) shows each specific example configuration diagram when extracting the switch to be operated in the same flowchart, and FIG. Each specific example configuration diagram in the case of performing open switch extraction is shown. 1... Opening operation procedure creation block, 2... Temporary open switch extraction block, 3... Closing operation procedure creation block, 4... Temporary open switch extraction block,
5... Charging/power outage status update block, 6... Operation procedure organizing block, CB1 to CB13... Switch. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masu Oiwa A: It. Condolences l Tadashi 2 @ CA) (8) Fig. 3 (A) CE) Fig. (C) (A) No. 5

Claims (3)

[Claims] (1) By comparing the system before the restoration operation immediately before starting the restoration operation and the determined system logically created to restore the power system that has been out of power due to an accident, the switch to be operated that is in different open/close states can be determined. extract the operation target switch, create an operation command procedure for the operation target switch so that the open/close state of the operation target switch is the same as the open/close state determined in the determination system, and automatically restore the power grid that has experienced a power outage. An automatic recovery system in the event of an accident in the power system. (2) Create an open operation command procedure and a close operation command procedure for the closed switches that are not extracted as the operation target switches to prevent temporary overload conditions that may occur during the recovery process. An automatic recovery system in the event of an accident in a power system according to claim (1). (3) A closing operation command is issued to a switch that connects the power system that is subject to automatic recovery in the event of an accident and a power system that is not under control, and is in a closed state and is not extracted as a switch to be operated. Procedures and open operation command procedures will be created to prevent the aforementioned power system, which is subject to automatic restoration in the event of an accident, from being restored to a system configuration different from the determined power system as a result of the restoration of the aforementioned power system over which control authority does not extend. Claim number consisting of (
Automatic recovery method in the event of an accident in the electric power system as described in section 1).