考虑暂态功角稳定的风机短路电流与无功支撑关键参数优化方法  

Key parameters optimization method of wind turbine short circuit current and reactive power support considering transient power angle stability

作　　者：华文 董炜 陆翌 郑晨一 Hua Wen;Dong Wei;Lu Yi;Zheng Chenyi(Electric Power Research Insti tute,State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,浙江杭州310014 [2]东南大学电气工程学院,江苏南京210096

出　　处：《可再生能源》2025年第2期275-284,共10页Renewable Energy Resources

基　　金：国家电网有限公司科技项目(5100-202319032A-1-1-ZN)。

摘　　要：以风电为代表的新能源并网系统暂态功角稳定和电压稳定问题交织,同时伴随着电网短路电流水平超标风险。当前研究大多聚焦单一问题提升系统的稳定性,未综合考虑多方面因素制定风机控制参数的优化方法。针对这一问题,文章提出了考虑暂态功角稳定的风机短路电流与无功支撑关键参数优化方法。首先,基于风火联合送出系统简化模型分析了功角稳定问题的产生机理,以及风机有功出力对功角稳定性的影响;然后,推导了直驱风机短路电流的解析表达式,分析了影响有功电流和无功电流水平的关键因素;最后,结合仿真研究了短路电流关键参数对风机无功电压支撑能力的影响,在此基础上,制定了考虑暂态功角稳定性的风机短路电流与无功支撑关键参数的优化原则及方法。基于实际电网的仿真分析结果表明,所提方法能够在保障暂态功角稳定裕度和短路电流水平的前提下,提升风机的无功电压支撑能力。The transient power angle stability and voltage stability issues of new energy grid connected systems like wind power are combined,and suffer the risk of short circuit current level.Current research mostly focuses on improving the stability based on single factor,without considering the multiple factors to develop optimization methods for wind turbine control parameters.To solve the issue,an optimization method for key parameters of wind turbine short circuit current and reactive power support is proposed in this paper considering transient power angle stability.Firstly,based on the simplified model of wind-thermal combined system,the mechanism of power angle stability problem and the influence of active power output of the wind turbine on power angle stability are analyzed.Then,the analytical expression for the short-circuit current of the direct-driven wind turbine is derived,and the key factors that influence the levels of active and reactive currents are analyzed.Finally,the influence of key parameters of short circuit current on the reactive power voltage support capacity of wind turbines are studied by simulation,based on which the optimization principles and method for key parameters of wind turbine short circuit current and reactive power support considering transient power angle stability are developed.The simulation analysis results based on actual power grids show that the proposed method can improve the reactive voltage support capacity of wind turbines while ensuring transient power angle stability margin and short circuit current level.

关 键 词：功角稳定 无功电压 短路电流 低电压穿越 控制参数优化 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程] TM712[电气工程—电力系统及自动化]