摘要
研究了基于永磁同步发电机的直驱式风力发电系统中PWM背靠背双三电平全功率变流器的运行特性,详细介绍了发电机侧和电网侧PWM变流器的运行状态,在数学模型的基础上给出了具体的控制策略。仿真结果表明系统能够在不同风速下发电机侧输出电流近似正弦谐波含量少,系统能够稳定运行;电网侧输出的有功和无功电流完全独立可调,直流侧电压稳定,并网电流质量较高。
In this paper,the operation characteristics of PWM back-to-back full scale converter in direct drive wind power system based on permanent magnet synchronous generator were investigated.The operation conditions of the PWM converters at both sides of the generator and the grid were described in detail and the specific control strategy was given based on mathematical model.The simulation results showed that the system could output the current at the generator side with insignificant content of sine current harmonics under varied wind speeds,and the system could be operated in a stable state;The active and reactive currents could be decoupled and controlled separately at the grid side;the dc-voltage could be kept constant and the quality of grid side currents was high.
出处
《华东电力》
北大核心
2010年第9期1399-1404,共6页
East China Electric Power
基金
重庆市自然科学基金(CSTC2007BB3169)~~
