作　　者： ; ; ; ; ;

机构地区： 广东工业大学自动化学院

出　　处： 《陕西电力》 2010年第1期11-16,共6页

摘　　要： 开环控制的矩阵变换器空间矢量调制方法在输入端有随机扰动的情况下,输入电流、输出电压易出现波形畸变和谐波,为此提出输出电压闭环控制方法。对实际输出电压进行实时采样,计算其旋转空间矢量的相位、幅度以及与期望输出电压的空间矢量对应各量的偏差,将两者的相位偏差和幅度偏差作为负反馈量,加到下一个采样周期中以修正开关调制矩阵函数,从而实现系统的闭环控制。给出了算法的具体实现方法,仿真验证了算法的正确性和有效性。 As for the space vector modulation of the matrix converter （MC） with open-loop control method, the input current and the output voltage of MC will easily be led to waveform distortion and harmonic while random disturbance occur at the input of MC. In order to reduce the amount of harmonics and suppress waveform distortion as well as improve the stability of MC, a sort of closedloop control strategy of the output voltage of MC was proposed. The actual output voltage was sampled on line, the phase ＆ amplitude of rotating space vector of this voltage was also calculated and compared to the expected values of the output voltage. The phase deviation and amplitude deviation between the actual output voltage and the expected output voltage was used as negative feedback variables. To achieve the closed-loop control system, the variables were added in the next sampling period to modify modulation matrix switch function. A specific method of the algorithm was given by theoretical analysis. The correctness and effectiveness was verified with the simulation results.

关 键 词： 矩阵变换器 空间矢量调制 输出电压 负反馈 闭环控制

领　　域： [电气工程]