Relay Protection Risk Assessment Based on Fuzzy Information Granulation Algorithm

doi:10.3969/j.issn.1000-7229.2016.04.015

Abstract

Abstract:

Relay protection equipment is the first defense line for the safety of power grid, so the risk assessment of relay protection system is of great significance for the reliable operation of power grid. In order to solve the uncertainty of the data statistics of relay protection system, this paper adopts soft hierarchical model to establish the risk assessment model of relay protection. Firstly, based on the definition of risk, we point the risk factors, including the accident probability and accident loss of relay protection equipment. Secondly, we use state evaluation model to calculate the equipment failure rate and assignment method to calculate the loss caused by relay protection equipment failure. Then, we use fuzzy information granulation algorithm （soft algorithm） to process the data of accident probability and accident loss, calculate the risk and adopt fuzzy ranking method to sort the risks of multiple regions, which can provide theoretical basis for risk managers to make right decision. Finally, we use the actual data in a certain area to prove the correctness and effectiveness of the proposed fuzzy information granulation algorithm for the risk assessment of relay protection.

Key words: soft hierarchical model, fuzzy information granulation algorithm, accident （event） assignment, fuzzy ranking

CLC Number:

TM 77

LIN Yanzhen， GONG Qingwu. Relay Protection Risk Assessment Based on Fuzzy Information Granulation Algorithm[J]. Electric Power Construction, 2016, 37(4): 98-103.

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