注入信号频率对注入式定子接地保护的影响  

Influence of Injection Signal Frequency on Injection Stator Ground Protection

作　　者：周靖 郑梦阳 胡军 法拉蒂尔 傅剑文 ZHOU Jing;ZHENG Mengyang;HU Jun;FA Ladier;FU Jianwen(Xinanjiang Hydropower Plant of State Grid Xinyuan Hydropower Co.Ltd.,Hangzhou 311608,China;Guodian NARI Technology Co.Ltd.,Nanjing 211100,China;Zhejiang Yunda Wind Power Co.Ltd.,Hangzhou 311600,China)

机构地区：[1]国网新源水电有限公司新安江水力发电厂,浙江省杭州市311608 [2]国电南瑞科技股份有限公司,江苏省南京市211100 [3]浙江运达风电股份有限公司,浙江省杭州市311600

出　　处：《水电与抽水蓄能》2021年第2期103-109,共7页Hydropower and Pumped Storage

基　　金：国家自然科学基金资助项目(61773170)。

摘　　要：为研究注入信号频率对发电机注入式接地保护测量灵敏度、测量误差方面和保护注入功率的影响,得到注入式定子接地保护外加注入源频率的最佳选择范围,提升注入式定子接地保护的测量精度。通过MATLAB/SIMULINK模块仿真计算分析说明了采用电流判据的局限性,并得出注入信号的最佳选择范围。结果表明:注入信号的最佳选择范围低频区间为10~30Hz,高频区间为70~80Hz。In order to study the influence of injection signal frequency on the measurement sensitivity,measurement error and protection injection power of generator injection ground protection,the best selection range of injection stator ground protection plus injection source frequency was obtained,and the measurement accuracy of injection stator ground protection was improved.The simulation calculation analysis of MATLAB/SIMULINK module illustrates the limitation of using current criterion,and obtains the best selection range of injected signal.The results show that the best selection range of the injected signal is 10Hz~30Hz in the low frequency range and 70Hz~80Hz in the high frequency range.

关 键 词：注入式 频率特性 定子接地保护 注入功率 

分 类 号：TM771[电气工程—电力系统及自动化]