保护用电子式电流互感器暂态特性试验关键技术及装置研制  

Critical Technology and Equipment Development of Transient Characteristics Test on Electronic Current Transformer for Protection

作　　者：张杰[1,2] 叶国雄 刘翔 胡媛媛[1,2] ZHANG Jie;YE Guoxiong;LIU Xiang;HU Yuanyuan(NARI Group Corporation, State Grid Electric Power Research Institute, Nanjing 211106, China;Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute, Wuhan 430074. China;China Electric Power Science Research Institute, Wuhan 430074, China)

机构地区：[1]南瑞集团公司(国网电力科学研究院),南京211106 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]中国电力科学研究院有限公司,武汉430074

出　　处：《高电压技术》2017年第12期3884-3891,共8页High Voltage Engineering

基　　金：国家电网公司科技项目:电子式互感器检测;调试与运维技术深化研究~~

摘　　要：电流互感器的暂态特性是影响继保装置、关系到系统安全稳定的关键因素,其暂态特性及试验方法的研究对电网的保护控制和安全稳定运行具有重要的意义。为此对电力系统一次短路电流进行了理论分析,将其周期分量和非周期分量进行分解,并建立了理论数学模型。对现有试验技术存在的问题进行分析,提出基于不同时间尺度的模块化组合式试验技术,完成保护用电流互感器暂态试验电源的研制,并提供保护用电流互感器暂态特性试验的整体解决方案。试验结果表明:提出的保护用电流互感器暂态特性试验方法及检测系统,大幅度减小试验电源容量,实现全工况和宽范围一次时间常数的故障大电流模拟输出,其性能指标满足保护用电流互感器的暂态特性试验要求。The transient performance of current transformer is one of key factors that are related to the security and sta- bility of power grid, so it is of great significance for transient characteristics research and test method of protective current transformer. Consequently, we theoretically analyzed the short-circuit primary current of power system by decomposing the periodic component and the aperiodic component. Moreover, we analyzed the problems and deficiencies of the existing test technology, put forward the different time scales of the modular combination test technique based on the development of current transformer transient power protection test, greatly reduced the test power supply capacity, fault current to achieve full working condition and wide range of a time constant of the analog output, and provide solutions with the overall transient characteristic of current transformer test protection scheme. Meanwhile,we put forward a test method of transient characteristic of current transformer and detection system for protection. The test results show that, the technical performance indicators fully meet the testing requirements of electronic current transformer for protection.

关 键 词：保护用电流互感器 暂态特性 一次时间常数 模块化组合 暂态大电流试验电源 电子式互感器 

分 类 号：TM452[电气工程—电器]