自适应零序电流保护的研究

A Study of Adaptive Zero-sequence Current Protection

零序电流保护是一种重要的接地保护方法.传统零序电流保护的整定值通过离线计算得到,使保护装置无法达到最佳保护效果.指出了传统零序电流保护整定缺点,论述了自适应零序电流保护的实现原理和具体实现方法,并举例说明了自适应零序电流保护具有提高保护灵敏度的优点.

The zero-sequence current protection is an important means of power system ground protection. In traditional zero-sequence current protective relaying, whose settings are calculated in off-line mode, the optimal protection can not be achieved. After pointing out the shortcomings of traditional zero-sequence current protection, the paper expounds the basic principles and realization methods of adaptive zero-sequence current protection, and illustrates that the new protection can enhance sensitivity.