双馈风电场无串补并网振荡场景及关键影响因素研究  

Oscillation Scenarios of Grid integrated Wind Farm with DFIGs Without Series Compensation and Effects of Key Factors

作　　者：熊浩清 何鹏飞 孙冉 孙海顺[2] 巴贵 田春笋 XIONG Haoqing;HE Pengfei;SUN Ran;SUN Haishun;BA Gui;TIAN Chunsun(State Grid Henan Electric Power Company,Zhengzhou 450000,China;Key Laboratory of Power Security and High Efficiency,Hubei Province,Huazhong University of Science and Technology,Wuhan 430074,China;State Grid Tibet Electric Power Co.,Ltd.,Lhasa 850000,China;State Grid Henan Electric Power Company Electric Power Research Institute,Zhengzhou 450052,China)

机构地区：[1]国网河南省电力公司,郑州450000 [2]电力安全与高效湖北省重点实验室(华中科技大学电气与电子工程学院),武汉430074 [3]国网西藏电力有限公司,拉萨850000 [4]国网河南省电力公司电力科学研究院,郑州450052

出　　处：《高电压技术》2024年第2期660-672,I0011-I0013,共16页High Voltage Engineering

基　　金：国网河南省电力公司科技项目(52170222000X)。

摘　　要：双馈风电场经串补线路送出系统存在次同步振荡风险的问题已为共知并得到广泛深入研究,然而实际系统中也发生过双馈风电场经无串补线路送出的次超同步振荡问题,目前针对这一问题的报道和研究很少。因此,采用特征模式分析法结合电磁暂态仿真,针对双馈风电无串补接入电网的次同步振荡问题开展研究,分析了系统主导失稳振荡模式以及运行条件和风电控制参数的影响,厘清了无串补并网系统中双馈风电网侧变流器内环电流控制主导失稳,锁相控制主导失稳,以及转子侧变流器内环电流控制主导失稳等3种次超同步振荡场景,并与双馈经串补送出系统振荡场景进行了对比分析,较为全面地揭示了双馈风电并网系统振荡的不同场景及机理,可为实际工程双馈风电场并网振荡问题分析提供参考。The risk of sub-synchronous oscillations in wind farm with doubly-fed induction generators(DFIGs)connected to the grid via series capacitor compensated transmission line is well known and has been widely studied.However,the research on sub-and super-synchronous oscillations which can be observed in DFIGs integrated system without series capacitors is rarely availale in the literature.In this paper,eigenvalue analysis as well as electromagnetic transient simula-tion were applied to study of sub-and super-synchronous oscillation problem.The dominant unstable modes of the DFIGs integrated system without series compensation were investigated.The effects of operation conditions as well as control parameters on the stability of these dominant modes were analyzed.The oscillation scenarios dominated by GSC control,PLL,and RSC control,respectively,under weak grid connection were disclosed.By comparison with the case of DFIGs connected to grid via series compensated transmission line,the DIFGs integrated system related sub-and super–synchronous oscillation scenarios and the relevant mechanisms were clarified.This work can provide a reference for practical DFIGs integrated system oscillation analysis.

关 键 词：双馈风机 次同步振荡 弱电网 特征值分析 主导振荡模态 

分 类 号：TM614[电气工程—电力系统及自动化]