A Reliability Analysis Method of Substation Main Wiring Considering Line Protection

A technology of line protection and analysis method, applied in the field of power system, can solve the problems of system failure, failure to consider the mutual influence of two systems, reliability of relay protection system affecting the reliability of main wiring, etc., and achieve the effect of scientific analysis results

Active Publication Date: 2019-09-17
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at present, the reliability analysis of substation main wiring and line protection is only carried out for a certain system alone, without considering the mutual influence between the two systems
In fact, the relay protection system is closely related to the main wiring, and the reliability of the relay protection system will affect the reliability of the main wiring to a certain extent.
When the protection associated with the primary equipment or the adjacent protection malfunctions, it will cause a system failure

Method used

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  • A Reliability Analysis Method of Substation Main Wiring Considering Line Protection
  • A Reliability Analysis Method of Substation Main Wiring Considering Line Protection
  • A Reliability Analysis Method of Substation Main Wiring Considering Line Protection

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Experimental program
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Embodiment 1

[0049] 1. A reliability analysis method for substation main wiring considering line protection. The substation main wiring has M incoming lines and N outgoing lines. The line protection consists of a set of line main protection I consisting of n elements and a set of m elements Line backup protection composed of components II is characterized in that the method first calculates the reliability index of the substation line protection and the equivalent reliability index of the circuit breaker of the substation line protection control, and then uses the minimum road set algorithm to calculate the reliability of the main wiring of the substation The equivalent reliability R of the performance index s and the equivalent failure rate λ s ,Specific steps are as follows:

[0050] A. Calculate the reliability index of substation line protection

[0051] a1. Calculation of reliability index of substation line main protection Ⅰ

[0052] a11. Calculate the reliability R(Ⅰ) of the reli...

Embodiment 2

[0091] The following examples are illustrative and intended to explain the present invention, but should not be construed as limiting the present invention.

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Abstract

The invention discloses a method for analyzing reliability of main wiring of a substation by considering line protection, and relates to the reliability analysis of a power system. The method comprises the following steps of firstly, calculating a reliability index of the line protection of the substation and an equivalent reliability index of a circuit breaker controlled by the line protection of the substation; then, utilizing a minimum path set algorithm to calculate the equivalent reliability Rs and the equivalent fault rate lambda[s] of the reliability index of the main wiring of the substation. The method has the advantages that the influence to the reliability of the main wiring of the substation by the line protection is considered, the reliability analysis result of the main wiring of the substation is more scientific, comprehensive and reasonable, and the method is suitable for being applied to actual engineering.

Description

technical field [0001] The invention relates to a power system, more specifically to a substation reliability analysis method, and belongs to the field of power system reliability analysis. Background technique [0002] In the past, digital substations took the primary and secondary equipment of the substation as the digital object, based on the high-speed network communication network communication platform, and realized information sharing and interoperability inside and outside the station by standardizing digital information. The existing substation endows the digital substation with new connotation, which has important features such as "intelligent primary equipment, digitized information in the whole station, standardized information sharing, and interactive advanced applications". [0003] The substation is a complex system engineering, which has main wiring composed of various primary equipment, relay protection system (including line protection, etc.), safety monito...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06Q10/06G06Q50/06H02H7/26
Inventor 张籍杜治蔡勇谢东肖智宏韩柳杨东俊颜炯陈峰江寿霞康巧萍刘洋陈艳波
Owner STATE GRID CORP OF CHINA
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