The Cause and Solution of Low Watching Voltage of Siemens 100% Stator Ground Fault Protection with 20Hz Voltage Injection
Chen Fenghua1, Wu Hao2, Gao Dijun3
1. Power Generation Company Huizhou Pumped Storage Power Station, Huizhou, Guangdong 516100; 2. Power Generation Company Guangzhou Pumped Storage Power Station, Guangzhou 510900; 3. Machinery Industry Information Institute SIEMENS Electric Power Automation Co., Ltd, Nanjing 211100
Abstract：This paper introduces the principleof Siemens 100% stator ground fault protection with 20Hz voltage injection, meanwhile, it also gives the cause of low voltage on the secondary side of earthing transformer, the influence on protection sensitivity, as well as the improvement measure of raising voltage, the debugging method after improvement measure. In addition, the paper also analyzes the setting method of earth current angle compensation and transmission resistance when debugging.
陈凤华, 吴昊, 高迪军. 20Hz注入式100%定子接地保护监视电压低原因分析及改进措施[J]. 电气技术, 2017, 18(4): 136-139.
Chen Fenghua, Wu Hao, Gao Dijun. The Cause and Solution of Low Watching Voltage of Siemens 100% Stator Ground Fault Protection with 20Hz Voltage Injection. Electrical Engineering, 2017, 18(4): 136-139.
2017, Vol. 18 
