光伏并网级联H桥变换器中故障单元的扩展无功功率交换

Fault-tolerant operation is a key feature of grid-tied photovoltaic fed Cascaded H-Bridge converter, where the converter operates continuously with faulty bypassed cells. After bypassing the faulty cells, the number of healthy cells decreases, the available dc-link voltage reduces and active power among the phases become unequal. As a result, the converter produces unbalanced and distorted grid cu...