电子式电流互感器在罐式断路器中的组合应用

Combination Application of Electronic Current Transformer in Tank Circuit Breaker

电子式电流互感器是智能变电站建设的重要组成部分,是实现信息化的关键技术,其测量准确度及可靠性对电力系统的安全、稳定和经济地运行有着重要的影响。针对电子式电流互感器在罐式断路器上的组合应用,分析了在罐式断路器特殊的运行和操作环境下,振动和电磁干扰对有源和无源电子式电流互感器测量精度的影响,为智能变电站中罐式断路器与电子式电流互感器的组合应用提供参考。

The electronic current transformer （ECT） is an important part of the smart substation, and plays a critical role in realizing the information automation.The measurement accuracy and reliability of the ECT have an important impact on the security, stability and economy of the power system. This paper introduces the combination of the electronic current transformer and the tank circuit breaker, and analyzes the measurement accuracy of the ECT under both vibration and electromagnetic interferences in the special operation and switching circumstances of the tank circuit breaker. By studying the characteristics and the performances of the ECTs, and of different working principles, the paper provides information with regard to combinations of ECTs and the tank circuit breaker in the smart substation.