LZ-2发电机失磁保护及其整定计算

Loss of Field Protection and Setting Calculation of LZ-2 Generator

针对发电机失磁引起的危害,分析了发电机失磁保护误动原因,并介绍了整流型抛球圆特性阻抗失磁继电器(LZ-2型)工作原理、阻抗特性及发电机失磁保护整定计算、调试方法。结果验证了采用继电器定值调节配置方案的可行性,可获得最小精确工作流量、防止误动。

Aimed at danger of loss of generator excitation,the cause of malfunction is analyzed. The working principle, impedance characteristic setting calculation and debugging method of a rectified type loss of generator excitation relay with round drop characteristic（LZ-2 type）are introduced. The results validate the feasibility of configuration scheme by use of relay setting configuration. Minimum precise working current and malfunction prevention are obtained.