电流互感器饱和对继电保护装置动作影响分析与对策

摘要

The impact of current transformer saturation on the action of relay protection devices is analyzed , and the principle of steady-state and transient protection occurring in current transformer is introduced .The process of correct action of relay protection devices affected by two saturations is studied separately in two actual cases .Finally, the detailed measures and sug-gestions are proposed according to the possible impacts as viewed from the type selection of equipment , the adjustment of grid operation mode , the development and improvement of protection devices and the setting of protection respectively .The facts prove that through these measures it can effectively reduce the impact of current transformer saturation on relay protection de -vices.%对电流互感器饱和对继电保护装置动作产生的影响进行了分析，介绍了电流互感器发生稳态和暂态保护现象的原理。并通过两个实际案例分别对两种饱和情况影响继电保护装置正确动作过程进行了深入研究。最后针对可能造成的影响分别从设备选型、电网运行方式调整、保护装置研发改进以及保护定值调整4个方面提出了详细的措施建议。事实证明，通过这些措施可以有效降低电流互感器饱和对于继电保护装置的影响。