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电网技术  2013 

DSTATCOM补偿指令电流的新型检测方法

, PP. 2819-2824

Keywords: 配电网静止同步补偿器,补偿指令电流,不对称和畸变电网电压,谐波抑制,无功补偿

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Abstract:

快速、准确地检测补偿指令电流是提高配电网静止同步补偿器(distributionstaticsynchronouscompensator,DSTATCOM)补偿性能的重要环节。在总结现有补偿指令电流检测方法的基础上提出一种新型检测方法。该方法利用基波正序电压提取模块检测出基波正序电压,之后对三相电流进行正余弦变换得到基波正序有功电流,与三相电流相减得到补偿指令电流。检测结果不受电网电压不对称和畸变的影响,无需利用锁相环电路获得同步旋转角,消除了由此带来的延时和误差,减少了硬件成本。仿真和样机实验结果验证了该方法的可行性。

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