矩阵变换器网侧相位无误差跟踪方法仿真研究

双级矩阵变换器(TSMC)因为换流相对简单,便于控制而成为当今研究的热点。在矩阵变换器整流级的控制中,电网相位的获取十分关键,在电网平衡时传统矩阵变换器是基于过零点检测进行相位获取。但是输入电压会出现波动、谐波、不平衡等干扰。这种非理想条件下,怎样实现电网相位的无误差跟踪便成为解决问题的关键。提出将改进的锁相环技术应用于输入三相电网电压的相位跟踪中,这是一种软件的锁相环技术,将改进的锁相环技术结合对称分量法应用于三相锁相环系统中,可以排除网侧输入电压的干扰,实现相位的无差跟踪。最后通过在MATLAB中搭建仿真模型,仿真结果证明这一方法可以很好的解决网侧输入不理想的问题。

Simulation Study of Error-free Trading Grid-side-phase Method for Matrix Converter

The two-stage matrix(TSMC) converter becomes the research hotspot because it is relatively simple and easy to control.In rectifier control of the matrix converter,how to obtain the phase of grid is very important.Traditional MC is based on zero crossing detection(ZCD) for obtaining the phase when the power network is balance.But there are disturbances such as fluctuations,harmonics,unbalanced voltage in input voltage.Thus,how to achieve the error-free trading of grid has become a critical problem under such non-ideal conditions.Using the enhanced phase-locked loop technology in phase trading of the input three phase voltage,this is a software PLL technology,using PLL technology combined with the symmetry components methods,and these are applied to the three phase synchronous rotating referenced system,which can eliminate the interrupts of input voltage,and realize error-free trading.Finally,the models in MATLAB are built.The simulation results show that it could be good solution to this problem.