Multilevel inverters (MLI) play an important role in AC applications and are undergoing continuous development topology control. In higher levels inverters, conventional MLIs have high components count which calls for modification of these topologies to obtain the same number with fewer reduce cost size. Balancing capacitors voltages is crucial operation MLI it becomes more challenging levels. ...

The MMC is composed of a large number sub-modules. operating conditions each sub-module are different, which will inevitably affect the capacitor voltage sub-module, resulting in difference sub-module. problem uneven system unavoidable, and greatly stable operation system. This paper studies multi-terminal flexible DC transmission (MMC-MTDC) based on modular multi-level converters. MMC-MTDC mod...

New energy sources such as solar energy, tidal and geothermal possess characteristics of random dispersion, making centralized utilization unfeasible. Microgrid structures control methods are relatively simple, enabling rational new sources, have garnered widespread attention. Compared to AC microgrids, DC microgrids easier control, reduce conversion steps, eliminate factors like reactive power...

A multivariable control strategy in a dq reference frame for grid-connected voltage source converters (VSCs) without using phase-locked loop (PLL) is presented this paper. First, common VSC controls such as vector current (VCC) and grid modulated direct power (GVM-DPC) are analyzed their main drawbacks identified. Then, the presented, including implementation of saturation anti-windup mechanism...