Design and Implementation of a Modular Multilevel Converter With Hierarchical Redundancy Ability for Electric Ship MVDC System

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

“…A new dual-phase shift PWM method is also introduced, which is responsible for the output power and provides capacitor voltage balancing on SMs. MMC for electric ship medium-voltage direct current (MVDC) power system applications is presented by Chen et al, 217 which has a capability of hierarchical redundancy control when failure occurs on SM. In this topology, SMs are designed with having special functions to assist performance of hierarchical redundancy control strategy.…”

A review of power electronics equipment for all-electric ship MVDC power systems

“…Electric drives employing VSCs with multilevel structure [96], such as the three-level NPC VSC [73], the Modular Multilevel Converter (MMC) structure [99], and many of the structures described in [75][76][77][100][101][102][103], are the most suitable to be directly connected to a MVDC grid. Usually, such high power drives are intended to be supplied by a MVAC grid; however, many of them can be easily adapted to a MVDC supply, mainly removing the AC/DC converter that interfaces the electric drive to the AC network.…”

An Overview of Power Electronics Techniques in Electric Systems for Transport Applications

“…Under this circumstance, the leakage current is alleviated. In addition, the fundamental frequency modulation technique in [61] was applied to minimize the switching times of each SM for further alleviation of the leakage current. On top of that, the useful model information for control purposes was maintained, which enables the steady state and small-signal analysis.…”