矩阵变换器双电压合成控制策略抗电网扰动性能分析

Analysis on Anti-Power System Disturbance Performance of Dual Line to Line Voltage Synthetic Control Strategy for Matrix Converter

矩阵变换器没有中间的直流环节,不同于传统的交?直?交变换器,因此输出侧波形对于输入侧电源的扰动非常敏感。文章分析了矩阵变换器双电压合成控制策略的原理,证明了在输入侧电源存在不平衡以及谐波的情况下,输出侧仍然为理想正弦波,并通过Matlab/Simulink仿真证明了该结论,而且此时电压谐波畸变率几乎没有发生变化。实验表明,矩阵变换器双电压合成控制策略具备自适应能力,对电网扰动具有抗干扰能力。

Different from traditional AC-DC-AC converters, there is no intermediate DC link in matrix converter, therefore its output waveform is very sensitive to the disturbance of input supply source. In this paper the principle of dual line to line voltage synthetic control strategy of matrix converter is analyzed; by means of simulation by Matlab/ Simulink it is proved that when disturbances such as harmonics and three-phase unbalance exist in input power supply source the output waveform is still ideal sinusoidal, and the voltage harmonic distortion rate is little short of variation. Experiments show that the dual line to line voltage synthetic control strategy of matrix converter possesses adaptive ability and can resist power system disturbance.