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...

Although LCL filters are used widely in the grid connected inverters to reduce high-orderharmonics, such a system increases system order and therefore sustainable design of closed-loopcontroller system will be complicated. Recently, the single-loop control strategy has beensuggested for L or LC filter based grid-connected inverters. However, the use of single-loopcontrol directly in LCL filter-...

This paper develops an adaptive control method for controlling frequency and voltage of an islanded mini/micro grid (M/µG) using reinforcement learning method. Reinforcement learning (RL) is one of the branches of the machine learning, which is the main solution method of Markov decision process (MDPs). Among the several solution methods of RL, the Q-learning method is used for solving RL in th...