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Intelligent substation secondary system reliability evaluation method based on failure physics

A smart substation and secondary system technology, applied in the field of electric power, can solve problems such as analysis, lack of failure location and failure cause of components

Inactive Publication Date: 2017-01-04
STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO +2
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AI Technical Summary

Problems solved by technology

So far, the reliability evaluation of the secondary system of smart substation lacks the analysis of the specific failure location and failure cause of components.

Method used

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  • Intelligent substation secondary system reliability evaluation method based on failure physics
  • Intelligent substation secondary system reliability evaluation method based on failure physics
  • Intelligent substation secondary system reliability evaluation method based on failure physics

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0026] like figure 1 , a method for reliability assessment of secondary system of smart substation based on failure physics, comprising the following steps:

[0027] Step 1, analyze the failure mode and mechanism of the key secondary components of the smart substation. Identify and classify the common failure phenomena of the secondary system of the smart substation, and clarify which part of the product it may be related to. The secondary equipment of the smart substation mainly includes the relay protection device, the merging unit, the intelligent operation box and the background server. The realization of the relay protection function needs to ensure that each unit can operate correctly. According to historical statistical data, the faults of secondary equipment in smart substations mostly occur in the ...

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Abstract

The invention provides an intelligent substation secondary system reliability evaluation method based on failure physics, comprising the following steps: analyzing the failure modes and potential failure mechanisms of a relay, an optical coupler, an optical fiber and a CPU chip; building failure physics models of various failure mechanisms based on the relationship between time-stress and the inherent parameters of the devices, and getting failure life functions of the devices in various failure modes; building distribution models of failure time under various failure mechanisms, and constructing a probability density function describing failure time; calculating the instantaneous failure rate of a failure mechanism of the devices according to the probability density function and a cumulative failure distribution function of the failure mechanism of the devices; and building an intelligent substation secondary system reliability model according to failure rate functions of the devices to evaluate the reliability of a secondary system of an intelligent substation. The evaluation result provides reference for maintenance of the secondary equipment of the intelligent substation, which is conductive to safe and stable operation of the intelligent substation.

Description

technical field [0001] The invention belongs to the electric power industry, and in particular relates to a reliability evaluation method for a secondary system of an intelligent substation based on failure physics. Background technique [0002] The reliability assessment of the secondary system of the smart substation can provide a reference for the condition maintenance of the secondary equipment, and effectively improve the operational reliability of the secondary system of the smart substation. So far, the reliability assessment of the secondary system of the smart substation lacks the analysis of the specific failure location and failure cause of the components. Considering that more and more electronic devices appear in the secondary system of smart substations, the life of electronic devices directly affects the reliability of the secondary system of smart substations. Therefore, it is meaningful to carry out reliability analysis based on failure physics for the seco...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06G06Q50/06Y04S10/50
Inventor 黄涛杨静张立玲李静夏超张时敏杨军
Owner STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO
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