基于变权理论的继电保护状态评价方法  

Status Evaluation Method of Relay Protection Based on the Variable Weight Theory

作　　者：彭志峰[1] 杨明玉[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《中国电力》2014年第4期92-96,共5页Electric Power

摘　　要：继电保护状态检修工作的开展需要以科学合理的状态评价作为基础。为此,根据状态评价指标体系的构建原则,提取影响继电保护装置及二次回路状态的主要因素,构建用于状态评价的状态量体系;在根据层次分析法和熵值法确定的组合权重的基础上引入变权思想,对各状态量的权重进行调整;建立状态量的模糊正态分布隶属函数模型,并以此对某变电站的一个间隔中的继电保护装置和二次回路的状态进行模糊综合评价。结果表明,基于变权理论的模糊综合评价法能够准确地判断继电保护装置及二次回路的状态,确定不健康的装置和回路。Status maintenance for relay protection needs the basis of a scientific and reasonable status evaluation. According to the constructing principle of status evaluation index system, the main factors which affect the status of relay protection devices and secondary loop are extracted, and a status indicator model for status evaluation is constructed. By using analytic hierarchy process （AHP） and entropy value method to determine a combinational weight, an idea of variable weight was introduced to adjust the weight of each status indicator. In addition, through building a membership function in fuzzy normal distribution of status indicators, the status of relay protection devices and secondary loop in a certain space was evaluated. The result shows that the fuzzy comprehensive evaluation method based on variable weight can accurately evaluate the status of devices and secondary loop, and then find the unhealthy ones.

关 键 词：继电保护 状态评价 变权重 模糊综合评价 

分 类 号：TM77[电气工程—电力系统及自动化]