Power grid fault diagnosis method based on multi-data fusion

A technology for power grid faults and diagnosis methods, which is applied in the directions of fault location, measurement of electricity, measurement of electrical variables, etc., can solve problems such as incompetence, difficulty in implementing power grid fault diagnosis systems, and difficulties in applying fault diagnosis systems.

Active Publication Date: 2016-12-14
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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Problems solved by technology

As a hot issue in the power field, fault diagnosis technology has achieved many research results. However, with the interconnection of power grids, the structure and operation mechanism of the power grid are becoming more and more complicated, and the uncertainty of alarm information and protection action behavior, many fault diagnos

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  • Power grid fault diagnosis method based on multi-data fusion
  • Power grid fault diagnosis method based on multi-data fusion
  • Power grid fault diagnosis method based on multi-data fusion

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Embodiment Construction

[0059] 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.

[0060] Such as figure 1 As shown, this embodiment discloses a grid fault diagnosis method, which may include the following steps: Step (1), determine the blackout area, and use the components therein as a fault diagnosis framework Ω. It is necessary to consider the uncertainty of the circuit breaker alarm information received by the dispatching system within a fixed t...

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Abstract

The invention discloses a power grid fault diagnosis method based on multi-data fusion. The method comprises steps: as for suspicious fault elements in an outage region, fault features are quantized from two angles of the electric quantity and the protective switch quantity respectively, according to electric quantity quantization indexes, features presented by the electric quantity before and after the fault are quantized according to Hilbert-Huang transform, and two indexes of an energy variation degree and an amplitude variation degree are defined, and according to protective switch quantity quantization indexes, a directed bipartite graph model for elements is built, and Bayesian suspected degree indexes are calculated and obtained; and a D-S evidence theory method is adopted to fuse elements, as evidences in a diagnosis frame, in the outage region to obtain an element fault degree, and the diagnosis function is realized. The fault diagnosis accuracy and the quickness can be improved.

Description

technical field [0001] The invention relates to the technical field of power network fault diagnosis, in particular to an online fault diagnosis method of a power network, in particular to a power network fault diagnosis method based on multi-data fusion. Background technique [0002] Fault diagnosis technology is to quickly and accurately identify the fault area and the nature of the fault by analyzing the alarm information indiscriminately received by the dispatching system after the fault occurs. Provide auxiliary decision-making to reduce the adverse impact on system operation caused by failures. As a hot issue in the power field, fault diagnosis technology has achieved many research results. However, with the interconnection of power grids, the structure and operation mechanism of the power grid are becoming more and more complicated, and the uncertainty of alarm information and protection action behavior, many fault diagnosis technologies are also Shows disadvantages ...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 温杰王萍顾越岭陈建国南萌周妮娜屠友强赵星
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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