The circulating current is one of the important issues for parallel converters. It affects system stable operation and degrades power quality. In order to reduce converter harmonic pollution grid, a new suppression strategy proposed source without any communication line. This able realize sharing between modules by changing external characteristics thus suppress among control adopts DC-side dro...

Abstract The structural characteristics of modular multilevel converters (MMC) lead to circulating current problems, which increases the requirements for device capacity and withstand voltage levels. Therefore, this paper proposes a suppression strategy based on new sliding mode control. This uses variable approach rate reduce chattering caused by Compared with using traditional PI control, it ...

One of the difficulties with PWM switching converters is high switching loss and electromagnetic interference due to switching at non-zero voltage and current, which limits the operating frequency. In order to reduce the converter volume and weight (by increasing the frequency) and reducing switching losses, zero voltage and current switching methods are recommended. In this paper, four main ze...

One of the difficulties with PWM switching converters is high switching loss and electromagnetic interference due to switching at non-zero voltage and current, which limits the operating frequency. In order to reduce the converter volume and weight (by increasing the frequency) and reducing switching losses, zero voltage and current switching methods are recommended. In this paper, four main ze...