摘要
详细介绍了一种电网甩负荷判断装置的实现方法,即在机组并网状态下,通过分析发电机定子电流和频率的变化量,快速准确地判断电网甩负荷工况,并开出信号控制调速器迅速关闭导叶到空载开度以下,切换运行方式到频率模式,避免水轮发电机组在电网甩负荷时过速停机情况的发生。
The realization method of a judging device for power grid load rejection is introduced. The method can quickly and accurately determine grid load rejection condition by analyzing the changes of generator stator current and frequency when the hydro-generator is connected to the grid. Under the condition of grid load rejection, the judging device will send signal to governor which closes guide vanes opening to the no-load position quickly, the signal also transmit to protection device which alter the unit operation mode to frequency simultaneously, that can avoid the unit shutdown due to grid load rejection.
作者
张鹏
尚明宏
赵先元
ZHANG Peng;SHANG Minghong;ZHAO Xianyuan(China International Water&Electric Corp.,Beijing 100120,China)
出处
《水力发电》
北大核心
2020年第5期105-109,共5页
Water Power
关键词
甩负荷
调速器
空载开度
过速
水轮发电机
load rejection
governor
no-load opening
over-speed
hydro-generator
