基于积分控制的双馈风电机组次同步谐振抑制策略  

Suppression Strategy of Subsynchronous Resonance Based on Integral Control for DFIG

作　　者：马浩 MA Hao(State Grid Xi'an Power Supply Company,Xi'an,Shaanxi 710032,China)

机构地区：[1]国网西安供电公司,陕西西安710032

出　　处：《东北电力技术》2025年第2期1-7,14,共8页Northeast Electric Power Technology

摘　　要：由于风电场的分布往往远离负荷中心,需要远距离输电才能将风电外送,而串联电容补偿技术以其能提高功率输送容量、增强电力系统稳定性等优点在远距离输电中得到了广泛应用。但线路中串补电容的增加同时也会给系统带来潜在风险,在目前主流的风电机组中,双馈风电机组最容易发生次同步谐振。因此提出了一种基于积分控制的抑制策略,以应对双馈风电机组由感应发电机效应导致的次同步谐振。首先,在建立双馈风电机组的等效电路时,提出了一种同时计及转子侧变流器阻抗与网侧变流器阻抗的分析方法;其次,提出了一种添加基于积分控制的虚拟电感抑制策略;最后,建立了风电场的等值仿真模型,通过仿真验证了所建等效电路与所提抑制策略的准确性。As the distribution of wind farms is often far from the load center,it needs long-distance transmission to deliver wind pow-er.Series capacitance compensation technology is widely used in long-distance transmission because of its advantages of increasing power transmission capacity and enhancing power system stability.However,the increase of series complement capacitance in the line also brings potential risks to the system.In the current mainstream wind turbines,double fed induction generators(DFIG)are the most prone to sub-synchronous resonance(SSR).Therefore,it proposes a suppression strategy based on integral control to deal with the SSR caused by induction generator effect of DFIG.Firstly,it proposes a new analytical method to consider the impedance of both rotor-side converter and grid-side converter when establishing the equivalent circuit of DFIG.Secondly,it proposes a virtual induct-ance suppression strategy based on integral control.Finally,it establishes the equivalent simulation model of wind farm,and the ac-curacy of the established equivalent circuit and the proposed suppression strategy is verified by simulation.

关 键 词：双馈风机 次同步谐振 等效电路 积分控制 串联补偿 

分 类 号：TM614[电气工程—电力系统及自动化]