摘要
针对云南电网实现异步互联后,出现的严重威胁电网安全运行的超低频振荡现象,分析了水轮机调速器的特性和直流频率限制器(Frequency Limit Controller,FLC)的数学模型,阐明了水轮机调速器和FLC的调节特征,探讨了它们对频率稳定性的影响,提出了优化水轮机调速器的PI参数、协调一次调频和FLC死区范围的调频策略。实际运行结果验证,所提优化措施对抑制异步互联后云南电网产生的超低频振荡现象具有有效性。
Aiming at the phenomenon of ultra-low frequency oscillation which seriously threatens the safe operation of Yunnan power grid after asynchronous interconnection,the characteristics of hydraulic turbine governor and the mathematical model of DC frequency limit controller(FLC)are analyzed.The regulation characteristics of hydraulic turbine governor and FLC are clarified,and their influence on frequency stability is discussed.The frequency modulation strategy of optimizing PI parameters of hydraulic turbine governor and coordinating primary frequency regulation and FLC dead zone range is proposed.The actual operation results verify the effectiveness of the proposed optimization method to suppress the ultra-low frequency oscillation in Yunnan power grid after asynchronous interconnection.
作者
韩建伟
于浩浩
张文渊
甘涛
辛业春
HAN Jianwei;YU Haohao;ZHANG Wenyuan;GAN Tao;XIN Yechun(China Southern Power Grid Co.,Ltd.EHV Transmission Company Kunming Bureau,Kunming 650000,China;School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China)
出处
《黑龙江电力》
CAS
2021年第1期24-27,共4页
Heilongjiang Electric Power
基金
中国南方电网有限责任公司科技项目(项目编号:0109002019030304bd00058)。
关键词
异步互联
超低频振荡
调频策略
水轮机调速器
直流频率限制器
asynchronous interconnection
ultra-low frequency oscillation
frequency modulation strategy
hydraulic turbine governor
frequency limit controller
