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三相电压型并网逆变器预测直接功率控制

, PP. 216-222

Keywords: 电压型并网逆变器,预测,直接功率控制,恒定开关频率

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Abstract:

研究了一种用于三相电压型并网逆变器的新型直接功率控制策略——预测直接功率控制(PredictiveDirectPowerControl,P-DPC)。重点讨论了P-DPC不同的电压矢量选择原则和电压矢量作用时间的处理方法,以降低低次电流谐波成分,获得更好的动、静态性能。该P-DPC可实现恒定的开关频率,解决了传统开关表直接功率控制策略(LUT-DPC)开关频率不固定的弊病,继承了直接功率控制策略功率快速调节的固有特点,且无需旋转坐标变换和空间矢量脉宽调制。在一台2kVA并网逆变器实验样机上对传统LUT-DPC、矢量控制和P-DPC进行了仿真和实验研究。结果表明了本文提出方法的有效性和其在可再生能源开发利用中的工程实用前景。

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