Power grid fault diagnosis method

A diagnostic method and technology for power grid faults, applied in the field of power systems, can solve problems such as inaccurate fault diagnosis of power grids, inability to express unreliability, etc., and achieve the effect of improving accuracy

Inactive Publication Date: 2015-05-06
STATE GRID SHANXI ELECTRIC POWER
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AI Technical Summary

Problems solved by technology

Fuzzy numbers can only represent the credibility of events or rules, but not their unreliability, and the problem of inaccurate grid fault diagnosis

Method used

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] Such as figure 1 As shown, this embodiment discloses a grid fault diagnosis method, the method may include the following steps:

[0030] S1. According to the preset topology analysis rules, the topology analysis is performed on the power grid after the fault, and the power-off components are obtained.

[0031] S2. According to the pre-configured protection info...

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Abstract

The invention discloses a power grid fault diagnosis method, including the steps of: topologically analyzing a power grid with a fault according to a preset topological analysis rule to obtain a power-losing element; establishing a Petri network model of the power-losing element according to the pre-configured protection information and the action information of a circuit breaker corresponding to protection information of the power-losing element, wherein the Petri network model is composed of a library, a transition and a connecting arc between the library and the transition, and the library includes a protection library, a circuit breaker library and a element library; valuating the parameters of the Petri network model to obtain an intuitionistic fuzzy Petri network model; the parameters include a library identification value, a transition threshold value and a connecting arc weight; the library identification value includes a protection library identification value, a circuit breaker library identification value and an element library identification value; obtaining the element library identification value according to the intuitionistic fuzzy Petri network model and a preset fuzzy reasoning rule; obtaining the fault probability of the power-losing element and determining the fault element according to the element library identification value and a preset measure function.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a grid fault diagnosis method. Background technique [0002] The uncertainty of fault information in grid fault diagnosis can be effectively expressed by fuzzy petri nets. In the fuzzy petri net, the framework of the net represents the knowledge structure based on production rules, and the place (p) represents a proposition. If the proposition is true, a token (token) is marked in the place, and the value of the token represents Confidence that the proposition is true; the rule reasoning process is represented by the trigger of a transition (Transition, t for short), and the causal link between the proposition and the rule is represented by the directed arc between the place and the transition. [0003] At present, in the fuzzy petri net model, all parameters are represented by fuzzy numbers. The fuzzy number can only represent the reliability of events or rules, but not its unreli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G06F17/50G06Q50/06
CPCY04S10/50Y04S10/52
Inventor 上官明霞赵嘉兴安成万
Owner STATE GRID SHANXI ELECTRIC POWER
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