隔离型双向AC-DC矩阵变换器闭环控制方法研究

Research on Closed-Loop Control Method of Bidirectional Isolated AC-DC Matrix Converter

根据隔离型双向AC-DC矩阵变换器(Isolated AC-DC Matrix Converter,IAMC)没有中间电容缓冲环节,输入和输出变换器控制之间存在耦合,研究提出了IAMC两级功率变换器的控制方法。通过对全桥变换器进行闭环控制进而实现对直流侧输出电流和功率的直接控制;三相-单相矩阵变换器实现对有功和无功功率的独立控制,以满足网侧功率因数的高精度控制。所提控制策略有效降低了两级变换器的耦合强度,保证了系统的良好性能。在MATLAB中进行仿真,结果表明,所提出的控制方法在使系统电能质量得到提高的同时,可以实现单位功率因数可调,验证了所提控制策略的正确性和有效性。

According to that the isolated bidirectional AC-DC matrix converter(Isolated AC-DC Matrix Converter,IAMC)has no intermediate capacitor buffer link,there is coupling between the input and output converter control,so this paper proposes a control method of the IAMC two-stage power converter.The direct control of the output current and power of the DC side was realized by the closed-loop control of the full-bridge converter;the three-phase-single-phase matrix converter realized the independent control of the active and reactive power to meet the high-precision control of grid-side power factor.The proposed control strategy effectively reduced the coupling strength of the two-stage converter and ensured the good performance of the system.The simulation was carried out in MATLAB,and the results show that the control method proposed in this paper can improve the power quality of the system,and at the same time,the unit power factor can be adjusted,which verifies the effectiveness and superiority of the proposed control strategy.