电流互感器饱和对继电保护的影响及对策

The Influence of Current Transformer Saturation on Relay Protection and The Corresponding Countermeasures

随着我国经济发展水平的不断提高和城市化进程不断加快,我国对供电的质量和效率要求也不断提高。因此电力系统中各个城市和地区都致力于电力改革,以更加稳定安全的保护装置来保证电力系统的平稳运行和电网升级。新型保护装置在一方面提高了供电稳定性,但另一方面也带来较为严重的问题,如供电容量加大随之带来的大量电流短路状况,电流互感器因其传变电流信号的重要功能,成为影响继电保护的重要影响因素。下文,笔者通过分析电流互感器的饱和现象,对该问题提出相应的对策,意在对该问题提出建设性合理化建议。

With the continuous improvement of China's economic development level and the continuous acceleration of the urbanization process,China's requirements for the quality and efficiency of power supply have also been improved day by day.Therefore,all cities and regions in the power system are committed to conducting power reform,so as to ensure a smooth operation of the power system and upgrade the power grid with more stable and safer protection devices.On the one hand,the new protection device can improve the stability of the power supply,on the other hand,it also brings some serious problems,such as a large number of current short circuits caused by the increase of the power supply capacity,and the current transformer's important function of transmitting and transforming current signal has become an important factor which affects the relay protection.In the following parts of the paper,the author puts forward corresponding countermeasures to the problems by analyzing the saturation phenomenon of the current transformer,so as to put forward constructive and rational suggestions for the problems.