三相背靠背变流器的研究与实现

Research and Implementation of Three-phase Back-to-Back Converter

为了提高三相背靠背变流器的可靠性和性能,改进传统解耦控制策略,提出改进后的前馈解耦控制策略。通过对采样三相电网电压的矢量控制,实现了d-q轴电流的解耦,并有q轴电流控制有功功率,d轴电流控制无功功率。最后,通过试验验证了所提策略的正确性与可行性。

In order to improve the reliability of the three-phase back-to-back eonrerter and reduce its cost,this paper proposed the use of all-digital software phase-locked loop, traditional PI control and improved PI control strategy. Through the vector control of the sampling three-phase grid voltage, the deeoupling control of the d-q axis current is realized, and the q-axis current controls the active power, and the d-axis current controls the reactive power. Finally, the correctness and feasibility of the strategy were verified by experiments.