水电机组逆功率运行时的特性与保护动作分析  

Analysis of Characteristics and Protection Actions of Hydroelectric Units during Reverse Power Operation

作　　者：袁岳 郭文[1] 李秋良 杨海 周筱矞 李圳培 YUAN Yue;GUO Wen;LI Qiuliang;YANG Hai;ZHOU Xiaoyu;LI Zhenpei(Xiluodu Hydropower Plant,China Yangtze Power Co.,Ltd.,Zhaotong 657300,China)

机构地区：[1]中国长江电力股份有限公司溪洛渡水力发电厂,云南昭通657300

出　　处：《水电与新能源》2024年第11期72-74,78,共4页Hydropower and New Energy

摘　　要：水电机组长时间逆功率运行将造成发电机绕组升温过热,并可能造成系统频率降低。通过对一起停机过程中的GCB操作连杆故障模拟仿真分析,揭示了发电机逆功率特性,计算了GCB分闸时刻、稳定时刻的发电机逆功率,最后针对发电机逆功率保护和失灵保护未动作,提出了改进措施。Reverse power operation of hydroelectric generator units for a long time will cause overheating of the generator windings and may result in the decrease of the system frequency.By simulating a GCB operation link rod fault during the unit shutdown process,the reverse power characteristics of the generator is analyzed.The reverse powers of the generator at the time of GCB disconnection and stabilization are calculated.At last,improvement measures are proposed to solve the failure of the malfunction protection and the reverse power protection of the generator.

关 键 词：水电机组 逆功率保护 保护动作情况 参数值变化 

分 类 号：TV734[水利工程—水利水电工程]