计及低穿有功恢复特性的风电高占比送出系统功角稳定演化规律研究  

Analysis of power angle stability evolution in high wind power penetration systems considering low-voltage ride-through active power recovery characteristics

作　　者：王炳然 薛峰 朱玲 刘庆龙 WANG Bingran;XUE Feng;ZHU Ling;LIU Qinglong(NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 210003,China)

机构地区：[1]国网电力科学研究院有限公司,江苏南京210003

出　　处：《电力系统保护与控制》2025年第5期156-167,共12页Power System Protection and Control

基　　金：国家电网公司总部科技项目资助(5108-202218280A-2-216-XG)。

摘　　要：风火打捆送出系统中大规模风电机组同时进入低电压穿越对系统暂态功角稳定影响显著。为揭示风电高占比送出系统功角稳定演化规律,首先,从理论上分析了风电低穿后有功恢复特性对暂态功角稳定的影响机理,提出了一种计及有功恢复时变特性的功角稳定裕度计算方法。其次,在此基础上,考虑临界群风电与余下群负荷等量增长、临界群风电等量置换同步机出力、临界群风电等量置换同步机开机三种风电高占比系统演化方式,基于等面积法则推导并分析了系统功角稳定特性演化规律。最后,采用单机无穷大系统和实际区域电网仿真验证了系统暂态稳定特性演化规律。The simultaneous entry of large-scale wind turbines into low-voltage ride-through(LVRT)in wind-thermal bundled power systems can significantly impact on the transient power angle stability of the system.To reveal the evolution law of power angle stability in high proportion wind power transmission systems,the influence mechanism of active power recovery characteristics on transient power angle stability after LVRT is theoretically analyzed first,and a power angle stability margin calculation method considering the time-varying characteristics of active power recovery is proposed.Next,based on this analysis,three evolutionary scenarios for high wind power penetration systems are considered:equal growth of critical wind power and remaining system load;equal replacement of synchronous generator output with critical wind power;and equal replacement of synchronous generators with critical wind power leading to generator startup.Using the equal area criterion,an evolutionary law of power angle stability is then derived and analyzed.Finally,simulations on both a single-machine infinite bus system and a real-world regional power grid verify the evolutionary characteristics of transient stability in high wind power penetration scenarios.

关 键 词：双馈风机 暂态功角稳定 低电压穿越 有功恢复 等面积准则 

分 类 号：TM7[电气工程—电力系统及自动化]