适用于高/低电压穿越的双馈风机协同控制策略及其稳定技术研究  

Research on Doubly-fed Induction Generators Synergetic Control Strategy and Stability Technology for High/Low Voltage Ride Through

作　　者：甄永赞[1] 苏宁赛 李美林 ZHEN Yongzan;SU Ningsai;LI Meilin(Department of Electric Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China)

机构地区：[1]华北电力大学电力工程系,河北省保定市071003

出　　处：《电网技术》2021年第1期39-48,共10页Power System Technology

基　　金：国家自然科学基金项目(51507064)。

摘　　要：针对双馈风电机组(doubly fed induction generator,DFIG),提出可提高DFIG高/低电压故障穿越能力的协同控制算法、系统稳定性约束条件以及控制参数的优化方法。在电网电压对称突变且硬件保护电路不投入运行时,该算法可加速定子磁链暂态分量的衰减,实现抑制转子侧变流器的过电压和过电流,提高DFIG的故障穿越能力。对所提控制算法进行非线性动力学分析,给出系统同时满足高/低电压故障穿越过程的大范围稳定约束条件,以及与稳定约束条件近似等效的数值方法,解决了原约束条件难以解析求解的问题。最后通过仿真验证了所提控制算法的故障穿越能力,同时表明所提数值稳定约束条件以及参数优化方法是有效的。A synergetic control algorithm is proposed for doubly fed induction generator(DFIG)’s converter. The synergetic control algorithm can accelerate the decay speed of the stator flux linkage during voltage ride through, so it can reduces overvoltage and overcurrent of the DFIG’s rotor. The voltage ride-through stability analysis of DFIG using this algorithm is performed, and a numerical solution equivalent to the analytical solution of the stability condition is given. The effectiveness of the numerical calculation method for voltage ride-through capability and stability determination of the synergetic control algorithm were verified by time-domain simulation. And the method of optimizing control parameters is effective.

关 键 词：双馈风机 电压故障穿越 协同控制 大范围稳定 参数优化 

分 类 号：TM614[电气工程—电力系统及自动化]