代志强,王维庆,何山,樊小朝,谢永流,高龙.双馈风力发电系统并网逆变器不同控制策略分析[J].电测与仪表,2016,53(7):. DAI Zhiqiang,WANG Weiqing,HE Shan,FAN Xiaochao,XIE Yongliu,GAO Long.Comparative Analysis of Inverter Different Control for Double-fed Wind Power Generation System[J].Electrical Measurement & Instrumentation,2016,53(7):.
双馈风力发电系统并网逆变器不同控制策略分析
Comparative Analysis of Inverter Different Control for Double-fed Wind Power Generation System
The double-fed wind power generation system and network grid inverter with current feedback PI control, although under ideal conditions can be achieved grid inverter control system, high power factor, low steady-state error performance, but there are harmonic interference when the situation, steady state and dynamic tracking performance deteriorates; in addition, PI controller can achieve zero steady-state error to DC signal, but do not eliminate the harmonic components of the AC signal, and the need for complex coordinate transformation and decoupling control several times. Thus, this paper proposes a grid-current feedback of multi-resonant PR capacitor current feedback control,and improve the control precision; the introduction of low-order harmonics compensation item, can effectively inhibit the grid current waveform distortion. Simulation results show that the proposed control strategy can not only realize the AC signal no static error control and has good dynamic and steady-state tracking performance, but also the system and less net current harmonic content, to meet the power and wind power system network claim.
