基于继电保护装置温度的缺陷诊断方法  

Defect Diagnosis Method Based on Relay Protection Device Temperature

作　　者：李穰 李仲青 裘愉涛 张烈 郭鹏 LI Rang;LI Zhongqing;QIU Yutao;ZHANG Lie;GUO Peng(National Key Laboratory for Grid Security(China Electric Power Research Institute Ltd.),Beijing 100192,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China)

机构地区：[1]电网安全全国重点实验室(中国电力科学研究院有限公司),北京100192 [2]国网浙江省电力有限公司,浙江杭州310007

出　　处：《河北电力技术》2025年第1期42-46,65,共6页Hebei Electric Power

基　　金：国家电网有限公司科技项目(5108-202218280A-2-268-XG)。

摘　　要：随着智能变电站的建设和运行,继电保护装置的温度可以实现实时上送,因此可以利用装置温度对保护装置进行缺陷诊断。首先利用卡尔曼算法对采集的实时装置温度数据进行噪声处理,提升装置温度数据的可信度。其次,根据装置温度与环境温度的关系以及格拉布斯准则生成在线的环境温度。最后,鉴于保护装置无法判断温度变化是受环境温度影响还是装置异常引起的问题,定义了名义装置温度,并提出通过名义装置温度的差值来识别装置异常或故障的方法。通过具体案例验证了该方法可有效识别保护装置的故障或异常。With the construction and operation of intelligent substations, relay protection devices can transmit real-time temperature data, enabling the use of device temperature for defect diagnosis.In this paper, the Kalman algorithm is employed to process noise in the collected real-time temperature data, enhancing its reliability.Subsequently, the online ambient temperature is generated based on the relationship between device temperature and ambient temperature, using the Grubbs criterion.To address the challenge of distinguishing whether temperature changes are due to ambient temperature variations or device abnormalities, the concept of nominal device temperature is introduced.A method is proposed to identify device abnormalities or failures by analyzing the difference between the nominal and actual device temperatures.Case studies demonstrate that the method effectively defects faults or abnormalities in protection devices.

关 键 词：继电保护装置 缺陷诊断 卡尔曼滤波 最小二乘法 

分 类 号：TM774[电气工程—电力系统及自动化]