摘要
针对电子式电压互感器定期校验方法盲目性强、费时耗力大,且常出现维护欠缺或者过度运维的问题,本文提出了一种基于信息熵的电子式电压互感器运行失效风险监测方法。首先,围绕电子式电压互感器校验的工作重点,构建了电子式电压互感器的准确性评价指标体系;其次,应用信息熵原理,构建电子式电压互感器运行失效风险模型,实现对电子式电压互感器运行实效风险的定量分析,从而指导工作人员进行针对性的校验,有效提升定期校验的效率与质量。最后,通过江苏地区的典型案例,验证了所提模型的合理性,以期为电子式电压互感器的安全稳定运行提供支持。
In view of the strong blindness,high time cost,and large labor consumption of the periodical calibration method for an electronic voltage transformer(EVT),as well as the problem of insufficient or excessive maintenance,an operation failure risk monitoring method for EVT based on information entropy is proposed.Firstly,an accuracy evaluation index system for EVT is constructed focusing the key aspects in the EVT calibration.Secondly,based on the principle of information entropy,an operation failure risk model of EVT is constructed to realize the quantitative analysis for the actual operation risk of EVT,so as to guide the working staff to carry out a targeted calibration and effectively improve the efficiency and quality of the periodic calibration.Finally,the rationality of the proposed model is verified by a typical case in Jiangsu Province,which will provide support for the safe and stable operation of EVT.
作者
李志新
陈文广
葛磊蛟
吴桥
陈飞
尧赣东
LI Zhixin;CHEN Wenguang;GE Leijiao;WU Qiao;CHEN Fei;YAO Gandong(State Grid Key Laboratory of Electric Energy Measurement(Electric Power Research Institute,State Grid Jiangsu Electric Power Co.,Ltd),Nanjing 210019,China;Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2019年第12期44-48,共5页
Proceedings of the CSU-EPSA
基金
国家电网有限公司科技项目(5210EF17001M)。
关键词
电子式电压互感器
信息熵
失效风险模型
角差
比差
electronic voltage transformer(EVT)
information entropy
failure risk model
angle difference
ratio error
