Fault diagnosis method used for intelligent substation secondary system

Abstract

The invention discloses a fault diagnosis method used for an intelligent substation secondary system. The fault diagnosis method includes the following steps that: components and equipment which act abnormally are determined, and secondary network static configuration information and dynamic monitoring information of the components and equipment which act abnormally are extracted; a topological search structure diagram is established, and a fault zone is determined; integrated automation system alarm information of each set of equipment in the fault zone is screened, and work information of each set of suspected failure equipment in the zone is diagnosed; a final fault type is determined, and diagnosis results are outputted; and fault maintenance results are fed back. The fault diagnosis method used for the intelligent substation secondary system of the invention has the advantages of wide application range, meticulous and reliable diagnosis process, and accurate and reliable diagnosis results, and can lay a solid foundation for fault diagnosis and evaluation of the secondary system.

Description

technical field [0001] The invention relates to a fault diagnosis method for a secondary system of an intelligent substation, in particular to a fault location method for protection refusal and misoperation and switch refusal and misoperation in the primary system diagnosis results when a power system fails. Background technique [0002] The secondary circuit in a conventional substation is hard-wired. There is a one-to-one mapping relationship between this physical wiring and the functional configuration of the substation and the input and output of information or signals between functions. Therefore, it can be monitored and analyzed only through the detection of the secondary wiring. Substation secondary system failure. The secondary system of the smart substation is represented by a physical communication network carrying functional logic signals. The conventional secondary circuit becomes a communication network. There is no one-to-one correspondence between the physica...

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Problems solved by technology

[0003] Fault detection and analysis methods based on conventional secondary electrical circuit wiring cannot be applied to smart substations at all, making it difficult to carry out services such as fault detection and analysis of smart substations

Traditional power system fault diagnosis and evaluation methods can no longer meet the operation requirements of substation intelligentization in terms of diagnosis depth and diagnosis methods. Most of the existing fault diagnosis models are based on protection action information, switch displacement information and primary system topology. However, these diagnostic methods only involve the location of the faulty components of the primary system, rarely involve the abnormal working status of the secondary system equipment, and fail to diagnose the faulty equipment of the networked secondary system, which plays an important role in the operation of the substation. , which is not conducive to the rapid removal of system faults and power restoration in blackout areas, and the use of intelligent substation networked secondary communication systems and equipment operating characteristic indicators for fault diagnosis reasoning, only relying on the diagnosis of protection information, switch information and primary system topology information, system theory

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