摘要
介绍了发电机失磁保护的现状以及常用的阻抗原理失磁保护方案。在分析现有方案存在的弊端后,对提高阻抗原理失磁保护性能的可行性进行了分析和探讨。详细介绍了阻抗原理失磁保护的改进方案,对其中的阻抗圆特性、低励磁电流元件和加速元件进行了重点阐述。最后简要介绍了实际微机保护装置的动模试验情况。
The current situation of generator loss of excitation protection and the usual scheme of loss of excitation protection based on impedance principle are introduced. By analyzing the defects of the usual scheme, the feasibility of improving the performance of impedance principle based protection is analyzed and discussed. The improved scheme of generator loss of excitation protection based on impedance principle is detailed focusing on the operation characteristics of the impedance circles, low excitation current element and accelerating element. At last, the dynamic model test of a real digital protection relay is briefly introduced.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第18期74-76,80,共4页
Automation of Electric Power Systems
基金
江苏省科技攻关项目(BE2004018)~~
关键词
发电机
失磁保护
阻抗原理
动模试验
generator
loss of excitation protection
impedance principle
dynamic model test
