基于正态云模型和综合权重的继电保护状态评估  

Evaluation of Relay Protection Status Based on Normal Cloud Model and Comprehensive Weight

作　　者：王宁霞 孔祥鹏 梁建龙 罗敏 陈卉 WANG Ningxia;KONG Xiangpeng;LIANG Jianlong;LUO Min;CHEN Hui

机构地区：[1]国网青海省电力公司调控中心,青海西宁810001 [2]国网青海省电力公司电力科学研究院,青海西宁810008

出　　处：《青海电力》2020年第3期1-5,24,共6页Qinghai Electric Power

摘　　要：针对当前继电保护状态评估工作中指标权重设定过于粗糙以及评价模型未考虑不确定性等问题,提出了一种基于云模型和融合权重的评估方法。通过合作与博弈达到主观权重和客观权重的最优融合。在主观权重的确定过程中,通过序关系分析法和基于灰色关联分析的相对熵集结模型实现专家群决策意见集合,同时引入变权理论解决部分指标严重恶化的问题。采用正态隶属云模型对指标状况进行刻画,确保评价的客观合理。最后通过一座110 kV智能站装置的实例验证了方法的可行性。In order to solve the problems of the current relay protection state evaluation,such as the index weight setting is too rough and the uncertainty is not considered in the evaluation model,an evaluation method based on cloud model and fusion weight is proposed.The optimal integration of subjective weight and objective weight is achieved through cooperation and game.In the process of determining the subjective weight,order relation analysis and relative entropy aggregation model based on grey correlation analysis are used to realize the expert group decision opinion collection,and variable weight theory is introduced to solve the problem of some indexes deteriorating seriously.The normal membership cloud model is used to depict the index status to ensure the objective and reasonable evaluation.Finally,an example of 110 kV intelligent station is given to verify the feasibility of the method.

关 键 词：继电保护 状态评估 正态隶属云 合作与博弈 变权 集结模型 

分 类 号：TM774[电气工程—电力系统及自动化]