摘要
继电保护设备是保障电网安全的第一道防线,因此评估继电保护风险对于保障电网可靠运行具有重要意义。为了解决继电保护系统数据统计带来的不确定性,采用软层次模型建立继电保护风险评估模型。首先从风险的定义出发,指出影响风险的因素,即继电保护设备发生故障的概率和发生故障后的损失;其次,采用状态评价模型计算设备故障率,采用赋分法计算继电保护设备发生故障带来的损失;再次采用模糊信息粒化算法即软算法处理事故发生概率以及事故损失的数据,计算风险并采用模糊排序方法对多个地区的风险进行排序,为风险管理者做出正确决策提供理论依据。最后结合某地区的实际数据表明采用模糊信息粒化算法做继电保护风险评估的正确性和有效性。
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.
出处
《电力建设》
北大核心
2016年第4期98-103,共6页
Electric Power Construction
基金
国家科技支撑计划项目(2013BAA02B01)~~
关键词
软层次模型
模糊信息粒化算法
事故(事件)赋分
模糊排序
soft hierarchical model
fuzzy information granulation algorithm
accident（event） assignment
fuzzy ranking
