电网不平衡下基于SGSC和PBC的DFIG风电系统的协调控制策略  

COORDINATED CONTROL STRATEGY OF DFIG WIND POWER SYSTEM BASED ON SGSC AND PBC UNDER UNBALANCED GRID VOLTAGE

作　　者：程启明 王玉娇 程尹曼 魏霖[1] 沈磊 Cheng Qiming;Wang Yujiao;Cheng Yinman;Wei Lin;Shen Lei(College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China;North Power Supply Branch,Shanghai Electric Power Company,Shanghai 200041,China;College of Electronics and Information Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]上海电力大学自动化工程学院,上海200090 [2]上海电力公司市北供电分公司,上海200041 [3]同济大学电子与信息工程学院,上海201804

出　　处：《太阳能学报》2021年第4期351-358,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(61573239);上海市电站自动化技术重点实验室资助项目(13DZ2273800)。

摘　　要：针对双馈异步发电机(doubly fed induction generators,DFIG)风电系统在电网电压不平衡时存在的问题,该文提出一种基于DFIG风电系统的协调控制策略,其创新之处在于把串联网侧转换器(serial grid-side converter,SGSC)与无源控制器(passivity-based controller,PBC)2种结构结合在一起,其中SGSC可抑制系统输出功率2次谐波脉动,PBC控制可提高系统控制性能。该协调策略不仅可实现直流母线电压恒定、网侧有功/无功无2次谐波脉动和网侧电流无负序分量几种控制目标,且实现了定子电流平衡和转子电流平衡,DFIG输出功率和电磁转矩无2次谐波脉动。软件仿真平台上实验结果验证了所提控制策略的正确性和优越性。Aiming at the problem of DFIG wind power system under unbalanced power grid voltage,the coordinated control strategy based on doubly-fed induction generator(DFIG)wind power system is proposed in this paper.The key innovation is to combine series grid-side converter(SGSC)with passivity-based controller(PBC),in which SGSC can suppress the second harmonic ripple of system output power,and PBC control can improve the performance of system control.The coordinated control strategy not only achieves several control objectives that are the constant voltage of DC bus,the grid-side active/reactive power without second harmonic ripple,and the grid-side current without negative sequence component,but also achieves the balances of stator current and rotor current,and no second harmonic ripples of DFIG output power and electromagnetic torque.The experimental results on software simulation platform verify the correctness and superiority of the proposed control strategy.

关 键 词：风电 双馈异步发电机 不平衡电网电压 无源控制器 协调控制 串联网侧变换器 

分 类 号：TM614[电气工程—电力系统及自动化]