TA饱和对继电保护影响的分析及对策

Analysis and Countermeasure for Relay Protection's Influence of Current Transformer's Saturation

介绍了中压电力系统中引起各种电流互感器误动的原因,分析了电流互感器饱和对电磁式电流继电器、晶体管或集成电路构成的模拟式电流继电器和微处理机构成的数字式电流继电器动作行为的影响。给出了选择合适的保护装置和在新建系统中选择电流互感器的一些原则。

This article mainly introduces the causes of Current Transformor＇s misacting in the middle voltage electric power system. Also analyses the influence of electromagentic current relay and analog current relay compose by transistors and integrated circuit （IC） and digital current relay compose by microprocessor which is caused by Current Transformor＇s saturation. At last the article gives some principles to choose right current protection and Current Transformor in new system.