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A network n-k analysis method based on hidden faults of relay protection system

A Technology of Hidden Fault and Relay Protection

Active Publication Date: 2015-10-21
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a power grid N-k analysis method based on hidden faults in relay protection systems. The correlation problem in the fault development process, and fully consider the protection of various types of hidden faults and the timing characteristics of each fault, so as to better analyze the occurrence mechanism and development process of N-k accidents, and identify the weak links of the power grid

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  • A network n-k analysis method based on hidden faults of relay protection system
  • A network n-k analysis method based on hidden faults of relay protection system
  • A network n-k analysis method based on hidden faults of relay protection system

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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0043] The basic idea of ​​the present invention is to propose a network N-k analysis method based on the hidden faults of the relay protection system by analyzing different types of hidden faults inside the protection system. First of all, according to the different triggering reasons and different triggering time points of hidden faults in the relay protection system, the relay protection syst...

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Abstract

The invention belongs to the field of power system relay protection and power grid cascading failure analysis and discloses a power grid N-k analyzing method based on relay protection system hidden failures. The method comprises the step of analyzing several typical hidden failure models of a relay protection system, the step of establishing solving models of various hidden failure trigger probabilities according to the hidden failure models, the step of carrying out the expected analysis on the power grid N-k according to the timing sequence characteristics of the hidden failure models to obtain the power grid N-k failure path and occurrence probability caused by the protection hidden failures. The method takes multiple types of protection hidden failures into consideration, the power grid N-k failure occurring and expanding process can be analyzed in the aspect of mechanism, the calculating accuracy of the N-k failure probabilities is improved, more N-k failure paths are found, and the limitation of a traditional N-k analysis method is compensated.

Description

technical field [0001] The invention belongs to the fields of power system relay protection and power grid cascading fault analysis, and more specifically relates to a power grid N-k analysis method based on hidden faults of a relay protection system. Background technique [0002] The relay protection system plays an important role in ensuring the safe and stable operation of the power grid. However, the hidden faults of the relay protection system often lead to untimely disconnection of grid components, resulting in the occurrence of cascading N-k faults. Several blackouts have shown that the hidden failure (HF) of the relay protection system has played a role in fueling the evolution of the power grid N-k. Analysis of power grid N-k accidents based on the hidden fault prediction of the relay protection system is helpful to analyze the cause of line misoperation from the perspective of the essence of protection hidden faults, and can obtain the N-k fault path and line set ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26G06F19/00
Inventor 李银红孙光陈志光曾耿晖邱建李一泉刘伯杰范文政
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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