Power system fault diagnosis method comprehensively using electricity amount and timing sequence information

A power system and fault diagnosis technology, which is applied in the direction of information technology support system, fault location, electrical digital data processing, etc., can solve the problems of unsystematic utilization of time series information, inaccurate initial confidence of Petri net, etc., and achieve clear physical meaning, Strong fault tolerance, improved accuracy and reliability

Active Publication Date: 2015-01-21
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0007] The present invention provides a power system fault diagnosis method that comprehensively utilizes electrical quantities and timing information, and solves the problem that the existing Petri...

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  • Power system fault diagnosis method comprehensively using electricity amount and timing sequence information
  • Power system fault diagnosis method comprehensively using electricity amount and timing sequence information
  • Power system fault diagnosis method comprehensively using electricity amount and timing sequence information

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0021] Such as figure 1 As shown, the steps of a power system fault diagnosis method that comprehensively utilizes electrical quantities and timing information are as follows:

[0022] Step 1, fault area search and suspicious component set identification: After a fault occurs, use WAMS information, SCADA information, static power grid topology data, and circuit breaker status change information to form blackout areas before and after the fault and conduct comparative analysis to quickly determine the fault area. Formation of suspicious component sets;

[0023] Step 2, establishing the weighted fuzzy temporal Petri net model of the element: combining the network topology, protection configurati...

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Abstract

The invention discloses a power system fault diagnosis method comprehensively using electricity amount and timing sequence information. Firstly, power-off areas before and after a fault are compared and analyzed to determine the fault area, and a suspicious element set is formed; secondly, a weighting fuzzy timing sequence Petri net model is built, and SCADA information, electricity amount information of a WAMS and the timing sequence characteristics included in the information are integrated to form the alarm information criterion, place delay restraints and the electricity amount criterion; a Gaussian function is adopted, the confidence coefficient of alarm information is obtained in combination with timing sequence reasoning, the initial confidence coefficient of the Petri net model is calculated through array calculation, and the model is solved; finally, backward reasoning is carried out according to the fault probability of an element, and protection and judgment of maloperation and motion refusal of a disconnector are carried out. The power system fault diagnosis method is high in fault-tolerant capability, can handle the phenomena of protection and maloperation/motion refusal of the disconnector and the phenomenon that an alarm is lost or wrong, and improves the accuracy and reliability of the fault diagnosis result.

Description

technical field [0001] The invention belongs to the technical field of power system safety processing, and relates to a power system fault diagnosis method that comprehensively utilizes electrical quantity and time sequence information. Background technique [0002] Power system fault diagnosis is to use the alarm information generated after the fault to timely and effectively determine the fault component, provide auxiliary decision-making for the dispatcher to quickly identify the fault, and help to remove the fault as soon as possible and restore the normal operation of the power system. Scholars at home and abroad have carried out a lot of research in this field and proposed many fault diagnosis methods. The power system fault diagnosis method based on Petri nets has been widely concerned in recent years because of its strict logic, clear physical meaning, and simple reasoning process, and some achievements have been made. The traditional Petri net consists of places, t...

Claims

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Application Information

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IPC IPC(8): G01R31/08G06F19/00
CPCY04S10/52
Inventor 张小易陈泾生吴奕江叶峰崔玉钟锦源袁宇波徐春雷霍雪松郭雅娟李斌蒋宇郭晏曾飞陈磊彭志强杨明李虎成樊海锋夏杰
Owner STATE GRID CORP OF CHINA
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