基于ADALINE的MMC子模块电容电压均衡控制方法

摘要

目前模块化多电平变换器(MMC)多数应用场合中采用的子模块(SM)均压控制策略,大多需要采集SM电容电压,对于电压与功率等级较高的应用场合,由于需要采集所有的SM电容电压,系统的建设成本和占地面积将随SM个数的增多而显著增多.因此基于自适应线性神经元(ADALINE)原理,提出了一种无需SM电容电压传感器的SM电容电压监测方法.该方法能有效预测SM电容电压值且无需占用较多的控制器资源.实验结果表明,该方法简单有效,易于实现,具有较高的应用与理论研究价值.%It is necessary to collect capacitor voltage for most of the capacitor voltage control strategy of modular multilevel converter(MMC).There are many sub modules(SMs) in high voltage and high power applications.The construction cost and floor area of the system will increase significantly with the increase of the number of SMs.Based on adaptive linear neuron(ADALINE),a SM capacitor voltage monitoring method without the use of SM capacitor voltage sensor is put forward.The proposed method can effectively predict SM capacitor voltage without occupying more controller resources.The simulation and experimental results show that the method is simple,effective and easy to implement.