The existence of the modules capacitors necessitates the control of their voltage level. A

dedicated controller is described that has two main parts the averaging controller that takes

care of the average capacitor voltage level per leg and the balancing controller that regulates

the voltage of each capacitor separately. In this application the load is well specified and the dc-link voltage of the converter can be assigned to the averaging controller. The power flow control and the grid current quality are-The existence of the modules capacitors necessitates the control of their voltage level. A

dedicated controller is described that has two main parts　the averaging controller that takes

care of the average capacitor voltage level per leg and the balancing controller that regulates

the voltage of each capacitor separately. In this application the load is well specified and the dc-link voltage of the converter can be assigned to the averaging controller. The power flow control and the grid current quality are