摘要
广州蓄能水电厂B厂原有的低频保护系统由12个频率计组成,回路复杂,经常误动。为了解决这些弊端,采用三台GE公司的DFF1002型号的频率继电器组成新的系统,改造后系统运行稳定,动作准确度高,保障了电网的安全稳定运行。重点介绍了新系统的设计、动作原理及动作逻辑,最后对新旧系统的功能进行了比较。
After the modification, the under-frequency protection system for Guangzhou Pumped Storage Power Station PhaseⅡis composed of three DFF1002 frequency relays made by GE. Now the system is in steady operation and with high degree of accuracy. The thesis introduces the necessity for updating the old system and emphatically states the design, the function principle and the operation logic of the new system. At last compares the difference between the new system and the old one.
出处
《水电站机电技术》
2007年第1期25-26,29,共3页
Mechanical & Electrical Technique of Hydropower Station
关键词
低频保护
频率继电器
设计
原理
逻辑
under-frequency protection
frequency relay: design
principle
logic
