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基于DPC-SVM变流器的一种快速功率控制方法

, PP. 469-473

Keywords: 直接功率控制,空间矢量调制,瞬时功率,动态响应

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Abstract:

在电压型PWM变流器的控制中,空间矢量调制直接功率控制成为研究的热点。传统的定频直接功率(DPC-SVM)控制方法瞬时有功功率在变流器两侧的传输速度相差很大,当负载变化较大较快时,会引起直流电压产生过冲,对设备造成损害。本文对影响功率动态响应能力的因素进行了深入地分析,推导了瞬时功率动态响应能力与变流器相关参数之间的关系,提出了利用动态过程中的瞬时无功功率加快能量在变流器两侧的交换速度的一种控制方法。仿真结果表明这种控制方法实现了快速功率响应控制,并且稳态运行性能良好。该控制方法实现简单,具有一定的实用价值。

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