全功率风电变流器并联运行控制策略及损耗研究

Research of Control Strategy and Power Loss on Full-Power Wind Power Converter Paralleled

研究了并联环流的产生机制和特点,提出了变化零矢量的SVM环流控制方法,结合并联系统的控制和运行特点,在深入研究功率器件、电容器和电抗器损耗之后,提出了实用的损耗计算公式,在MATLAB中搭建仿真模型分别在稳态运行、负载和转速动态变化以及有环流的情况下进行了仿真验证与分析,在3MW系统试验平台上进行了试验,达到预期效果。

This paper proposed a method of changing the zero vectors in SVM to control the circulation. Then ,a full-power wind power converter parallel operation system loss model was built combined with parallel operation ofthe control strategies and operational characteristics. A practical and more accurate loss formula was established. Thesystem simulation platform created by the software of MATLAB was used to verification and analysis in thecircumstances of steady-state operation, the dynamic change of load and speed, and the case of circulation.M oreover, experiments were conducted in the 3 MW full-power wind power converter system test platform. The resultsshow that the parallel control achieves the desired effect.