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直驱型风力发电用并网变流器控制策略

, PP. 146-150

Keywords: 风力发电机,并网变流器,控制策略,LCL型滤波器,双dq锁相环

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Abstract:

针对大功率直驱型风力发电系统中并网变流器输出电流含有较大电流谐波的问题,在并网变流器中引入LCL型滤波器取代典型的电感滤波器,针对由此对系统带来的不稳定性,采用并网变流器电流间接控制结合电网电压前馈补偿的控制策略。针对直驱型风力发电系统在电网电压不对称下运行,采用一种双dq锁相环技术,构建了15kW直驱型风力发电模拟平台,实验结果证明并网变流器可以稳定运行,同时具有较好的动静态性能。

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