JPS63217926A - Power system automatic operation system - 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] [Industrial Application Field] The present invention relates to an automatic power system operation system for automatically operating a switch in a power system.

[Conventional technology]

Figure 4 shows, for example, the process of automatic power system operation shown in 1-Development of an automatic generation system for power system operation procedures, which was presented at the National Conference of the Tun Kei Society in 1981.
In the figure, (8) is a procedure creation block that determines the switch operation order necessary to transition from the grid connection configuration at a certain point in time to the desired future grid connection configuration, and (9) is a decision block. If it is determined that there is no problem in "Simulation operation block 2, αG is °Simulation operation block", which checks whether any problems will occur when the switch is operated according to the specified operation order. This is an "actual operation block" that performs actual switch operations according to the operation order.

[Problem that the invention seeks to solve]

Conventional power system automatic operation systems are configured as described above, so the operation order is determined in advance, and at the time of actual operation, the operation order may no longer be appropriate due to changes in the system status. There was a problem that it might be missing.

This invention was made to solve the above problems, and depending on the system status at the time when the operation is to be performed,
The purpose of this study is to obtain an automatic power system operation system that can follow changes in the system status by determining appropriate operation details.

[Means for solving problems]

The power system automatic operation method of the present invention is designed to solve the following problems: When a "target system" is given, which is the connection form of the power system in the future that is desired to be achieved, this "target system" and the current power system connection form at the current point in time are Switches with different open/close states are extracted as operation candidate switches, and then
From among the operation candidate bW switches, the switches that can be operated at the present time are extracted as 1 yen "operable switches", and then from among the "operable switches", the priority determined from the current system status is selected. This is an automatic power system operation method characterized by selecting the switch to be actually operated according to the order of ranking.

[Effect]

In the automatic power system operation method according to the present invention, the open/close state is determined by comparing the conventional power system connection form (target system) that is desired to be achieved with the current power system connection form (current system). A different switch is extracted as a ``operation candidate switch'', and then a different switch is extracted as an ``operation candidate switch''.
From among these, the switches that can be operated at the current time are extracted as "operable switches", and then from among the "operable switches", the switches that are actually operated are selected according to the priority determined by the system status at the current time. Therefore, according to the present invention, even if a state change occurs in the system, the most appropriate operation at that time is performed at every moment.

In addition, if there are no "operable switches" before reaching the desired future power grid connection form (target grid), priority will be given to the "operable candidate switches" determined by the system status at the current point in time. Select one switch with the highest priority according to the order, then determine the system connection form (sub-target system) necessary to enable the operation of this switch, and then select the "sub-target system". By temporarily setting the system as the target system, the switches to be operated are selected, and after reaching the sub-target system by operating these switches, the target system is changed to the original target system. By returning to the "target system", it becomes possible to continue operations according to the system status from moment to moment.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

In Figure 1, (1) is a current system data file that stores current system status data, (2) is a target system data file that stores target system data, and (3) is a file that temporarily stores the "sub-target system". A backup target system data file for saving and saving the original "target system" data when setting it as the "target system", (4) compares the current system and the target system, and compares the current system with the target system, (5) an operation candidate switch extraction means for extracting a switch as an operation candidate switch; (5) an operable switch extraction means for extracting a switch that is currently operable from the "operation candidate switches"; (6) (7) is an operation switch selection means for selecting an interoperable switch which is a switch to be actually operated from among "operable switches" according to the priority determined by the current system status; Actual operation means to be performed in (8) is the operation candidate switch remaining (
If there are no operable switches left (the target system has not been reached) and it becomes impossible to continue the operation, one of the operation candidate switches with the highest priority at the current time is selected, and this switch is This is a sub-target system creation means that determines the system connection form (sub-target system) necessary to enable operation, and temporarily switches this sub-target system to the target system.

Each process in the operable switch extraction means (5), the operation switch selection means (6), and the sub-target system creation means (8), which are the main parts of the present invention, will be explained below.

In the process performed by the operable switch extraction means (5), an operable switch is extracted from among the operation candidate switches, taking into consideration the following constraints, for example.

■Based on the properties of the switch, such as interlock conditions ■Prohibition of system separation ■Prohibition of overload ■Constraints on phase angle when loop is turned on ■Prohibition of occurrence of voltage abnormalities ■Prohibition of occurrence of new power outages Please note the above constraints. is an example of a constraint in the accident recovery operation, and depending on the purpose of the operation, other constraints may be added or the constraints (■) and (■) may be removed.

In the processing by the operating switch selection means (6), operating switches are selected according to the following priority order, for example.

■ Opening operations during a power outage (disconnecting faulty equipment, etc.) ■ Closing operations during stop 4 (combined with busbar as recovery quasi-interval, LS closing, etc.) ■ Closing operations during full 1α (creating a loop, using combined equipment, etc.) ) ■ Parallel operation of the charging system ■ Opening operation within charging (loop opening, etc.) ■ Closing operation for charging 4 (recovery operation) The above priority order is an example of the priority order of operation switch selection in accident recovery operation. Depending on the purpose of the operation, it is also possible to insert an opening operation that causes a power outage or isolated system between the operations ① and ③. Note that if there are a plurality of switches with the same priority order, and a breaker and a neolithic device are included among them, the neolithic device is selected with priority. In addition, the switch referred to here refers to a group of switches connected in series without branching as one switch, and if there is a breaker in this switch group, this switch is It is considered to be a breaker, and if there is no breaker in this switch group, this switch is considered to be Neolithic.

FIG. 2 shows an example of the recovery operation order when the recovery operations are performed according to the above priority order.

In the processing by the sub-target system creation means (8), when there are operation candidate switches remaining (the target system has not been reached), there is no operable opening/closing due to operational constraints, and the operation cannot be continued. If this becomes impossible, select one of the operation candidate switches with the highest priority at the current time and determine the system connection form (sub-target system) necessary to enable operation of this switch. This sub-target system is then temporarily set as the target system, allowing the operation to continue.

The relationship between the target system and the sub-target system is illustrated in FIG. Further, a specific example of an operation in which a sub-target system is generated is shown in FIG.

Although the above embodiment has been described as an automatic power system operation method, this method is equally effective in a power system operation guidance system in which a human is involved in operating the power system.

〔Effect of the invention〕

As described above, according to the present invention, since the operation details are determined moment by moment by comparing the target grid and the current grid, it is possible to realize automatic operation of the power system that can flexibly respond to changes in the status of the grid. effective.

[Brief explanation of the drawing]

FIG. 1 is a flowchart/block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of the order of restoration operations, FIG. 8 is a diagram showing the relationship between the target system and the sub-target system, and FIG. 5 is a diagram showing a specific example of an operation in which a sub-target system is generated, and FIG. 5 is a diagram showing a conventional operation process. In the figure, (1) is the current lineage data file, (2)
is the target system data file, (3) is the evacuation target system data file, (4) is the operation candidate switch extraction means, (5)
(6) is an operable switch selection means, (7) is an actual operation means, and (8) is a sub-target system creation means.

Claims (2)

[Claims] (1) When a "target system" is given, which is the connection form of the power system in the future that you want to reach, compare this "target system" with the "current system", which is the connection form of the power system at the present time, Switches with different open/close states are “operation candidate switches”
Then, from among the "candidate switches", the switches that can be operated at the current time are selected as "operable switches".
An automatic power system operation method characterized in that the switch to be actually operated is selected from among the "operable switches" according to a priority determined by the current system status. (2) If there are no operable switches before reaching the target system, select the highest priority among the operation candidate switches according to the priority determined by the current system status. Select one switch, and then
Determine the "sub-target system" which is the connection form of the system necessary to enable the operation of this switch, and then temporarily set the "sub-target system" as the "target system" to actually Claim 1, characterized in that switches to be operated are selected, and after reaching the "sub-target system" by operating these switches, the "target system" is returned to the original "target system". The automatic operation method of the electric power system described in .