New Active Fault tolerant control of multicellular converter

In recent years, multicellular power converter, is being studied as one of the latest research topics in high power applications, for their attractive features such as, using minimal rating components, high quality voltage output, ability to integrate in smart grids and renewable energy systems, and higher power conversion efficiency. However, the redundant topology and serial connection makes the multicellular converter more subjected to the occurrence of faults. Therefore, a fault tolerant control (FTC) is necessary to solve this issue. In this paper, an FTC is proposed without changing the structure of multicellular converter during flying capacitors failure. A robust sliding mode control is used for different fault scenarios. Simulation results with Matlab proves the effectiveness of proposed FTC to increase robustness and reliability of multicellular converter.