摘要
风电场接入弱电网或经串补线路并网受扰后易引发电力系统的次/超同步振荡,切除有功率振荡的风电场是从源头上抑制系统振荡的重要控制措施。首先给出了振荡源的识别方法,分析了次/超同步振荡期间风机阻抗特性以证明识别方法的正确性,分析了次/超同步振荡期间风电场阻抗特性,然后提出了优先切除振荡源策略。最终,通过实例仿真验证了所提风电场振荡源识别及切机策略能高效抑制次/超同步振荡,保障电网安全稳定运行。
The wind farm connecting to weak power grid or after the series of network-connected line being disturbed are easy to cause sub/super-synchronous oscillation.Removing the wind farm with power oscillation is an important control measure to suppress the system oscillation at the source.The identification method of oscillation source is firstly given.The impedance characteristics of wind turbine during sub/super-oscillation are analyzed to verify the validity of identification method.Then the strategy of preferentially tripping oscillation source is proposed.Finally,the simulation results show that the proposed wind farm oscillation source identification and tripping strategy can effectively suppress sub/super-synchronous oscillation and ensure the safe and stable operation of the power grid.
作者
秦爽
李忠憓
岳涵
夏德明
QIN Shuang;LI Zhonghui;YUE Han;XIA Deming(Northeast Branch of State Grid Co.,Ltd.,Shenyang,Liaoning 110181,China)
出处
《东北电力技术》
2023年第1期1-5,11,共6页
Northeast Electric Power Technology
基金
辽宁省“兴辽英才计划”项目资助(XLYC1907156)。
关键词
风电场
次/超同步振荡
阻抗特性
振荡源识别
切机策略
wind farm
sub/super-synchronous oscillation
impedance characteristics
oscillation source identification
tripping strategy
