JPH05236654A - Second accident pattern simulation system for power line - Google Patents

Abstract

PURPOSE:To prevent an incorrect CB trip and an operation of a protective relay and to simulate an accurate accident affecting state of the same presence as an operation of a real system at a high speed by constituting to select a preset second accident sequence according to controlling condition. CONSTITUTION:A second accident sequence is previously set. In this case, a sequence NO 12 is selected according to a definition of presence/absence of a predetermined state change, second accident sequences 13-15 are set, and the sequences 13-15 are realigned in a time series sequence, and edited. When a second accident is detected, coincidence/discordance of a control condition is judged, and whether a time of the sequence which is realigned in a time series sequence is the same as a present time or not is judged. Then, if the sequence is a pattern having a state change presence, a sequence generating process is executed, but if the sequence is a pattern having no state change, the sequence is skipped to next sequence process. These processes are repeated until the sequence is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a re-accident pattern simulation system for a power system.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing setting of a re-accident sequence of a power system. In the figure, 11 is the equipment name of the accident point, 12 is the accident sequence number, 13 is the name of the circuit breaker CB or the protection relay RY which trips at the time of a re-accident,
Reference numeral 14 indicates an operating state of the circuit breaker CB or the protection relay RY which trips at the time of a re-accident, and 15 indicates a delay time after the occurrence of the re-accident. One re-accident sequence in FIG. 4 is set for one accident point.

FIG. 5 is a diagram showing a process of generating a re-accident sequence. In the figure, 16 is a step of detecting the occurrence of a re-accident, 17 is a step of determining whether or not the time of a sequence rearranged in chronological order is the same as the current time, 18 is a step of performing a process of sequence generation, 1
Reference numeral 9 represents a step of determining whether or not the sequence is all finished.

[0004]

In the conventional re-accident simulation method, as shown in FIG. 5, a protection relay or the like which executes all the steps of the set sequence and which does not originally operate depending on the control condition is provided. There was a problem that it would work.

The present invention has been made in order to solve this problem, and can prevent an illegal CB trip and a protection relay operation, and provide a high-speed accurate accident propagation situation with the same sense of presence as the operation of an actual system. It is an object of the present invention to provide a method of simulating a re-accident pattern of a power system that can be simulated.

[0006]

In order to achieve the above object, the present invention is preset in a re-accident pattern simulation method of a power system for simulating a re-accident that occurs when a circuit breaker is turned on at an accident point. The re-accident sequence was selected according to the control conditions.

[0007]

In the present invention, the re-accident sequence that operates and the re-accident sequence that does not operate are selected from the set re-accident sequences according to the control conditions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an accident sequence generation pattern. In the figure, 1 is a control type such as 43 Sw,
Reference numeral 2 indicates a sequence NO, 3 indicates presence or absence of a state change when the control type control conditions match, and 4 indicates a presence or absence of state change when the control type control conditions do not match.

FIG. 2 shows the set re-accident sequence. In the figure, 21 is a control type.

FIG. 3 is a diagram showing an operation flow of the re-accident sequence. In the figure, 21 is a control type, 22
Is a determination processing step of control condition agreement / non-coincidence, and 23 is a determination processing step of state presence / absence.

In this embodiment, a re-accident sequence as shown in FIG. 2 is set in advance. At that time, the sequence NO12 is selected and re-accident sequences 13 to 15 are set in accordance with the definition of presence / absence of state change shown in FIG. Then, the re-accident sequences 13 to 15 are rearranged in chronological order and edited.

Next, as shown in FIG. 3, when the occurrence of a re-accident is detected (step 16), it is judged whether or not the control conditions match (step 22), and the time of the sequence rearranged in time series is determined. It is determined whether or not the current time is the same (step 17). If the sequence is a pattern with state change, sequence generation processing is performed, but if it is a pattern without state change, the sequence is skipped. Then, the next sequence of processing is performed. These processes are repeated until the sequence ends.

6 to 8 show an example of a re-accident sequence in which the present invention is carried out. 6 shows the operation of the re-accident sequence according to the state of 43L, FIG. 7 shows the operation of the re-accident sequence according to the state of the partner line CB, and FIG. 8 shows the operation of the re-accident sequence according to the state of 43RC.

[0015]

As described above, according to the present invention, since the re-accident sequence is selected according to the control condition, it is possible to prevent the illegal CB trip and the protection relay operation, and to have the same realistic feeling as the operation of the actual system. It is possible to simulate the accurate situation of accidents at high speed.

[Brief description of drawings]

FIG. 1 is a diagram showing an accident sequence occurrence pattern of control conditions in an embodiment of the present invention.

FIG. 2 is a diagram showing a re-accident sequence set in the embodiment of the present invention.

FIG. 3 is a diagram showing an operation flow of the re-accident sequence.

FIG. 4 is a setting diagram of a conventional re-accident sequence.

FIG. 5 is a diagram showing an operation flow of the conventional re-accident sequence.

FIG. 6 is a diagram showing an operation example of an actual re-accident sequence.

FIG. 7 is a diagram showing an operation example of an actual re-accident sequence.

FIG. 8 is a diagram showing an operation example of an actual re-accident sequence.

[Explanation of symbols]

 1 Control type 2 Sequence number

[Procedure amendment]

[Submission date] May 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing setting of a re-accident sequence of a power system. In the figure, 11 is the equipment name of the accident point, 12 is the accident sequence number, and 13 is a circuit breaker (CB) or protection relay (RY) that trips at the time of a re-accident.
Name, 14 is a circuit breaker (CB) that trips in the event of another accident
Alternatively, the protective relay (RY) is in an operating state, and 15 is a delay time after the occurrence of a re-accident. One re-accident sequence in FIG. 4 is set for one accident point.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Next, as shown in FIG. 3, when the occurrence of a re-accident is detected (step 16), it is judged whether or not the control conditions match (step 22), and the time of the sequence rearranged in time series is determined. determines whether the current time is the same (step 17), when the sequence is in a pattern of presence status change, performs the sequence generation process, if it is pattern in no change, its sequence of <br /> Is skipped, and the next sequence of processing is performed. These processes are repeated until the sequence ends.

Claims (1)

[Claims] 1. A re-accident pattern simulation method for a power system that simulates a re-accident that occurs when a circuit breaker is turned on at an accident point, wherein a preset re-accident sequence is selected according to control conditions. Re-accident pattern simulation method for power system.