一种用于混合MMC直流故障下抑制桥臂过流和子模块过压的反向偏置电压控制方法

Blocking all submodules (SMs) of the hybrid modular multilevel converter is a simple way to clear dc fault currents. However, each arm's reverse-biased voltage (RBV) is uncontrolled in this method. In this case, the dc fault current will concentrate into two of the six arms. Thus, the maximum arm current will increase to the fault current in the dc line, which will lead to arm overcurrent. Moreove...