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Fault‐tolerant modular multilevel converter for a seamless transition between stand‐alone and grid‐connected microgrid

Research Authors
Alaa A Mahmoud, Ahmed A Hafez, Ali M Yousef, Mahmoud A Gaafar, Mohamed Orabi, Alaa FM Ali
Research Department
Research Date
Research Year
2023
Research Journal
IET Power Electronics
Research Abstract

Recently, renewable distributed generation (DG) systems have emerged to improve the power system security and reliability while reducing the environmental incompatibility of fossil fuel power plants. DG could operate either as a standalone and/or as a grid‐connected power system. The interfacing circuits of DG and their controls have to comply with utility quality regulations and afford a seamless transition from online to offline and vice versa. This article advises a simple and robust control scheme for a modular multilevel converter (MMC) that interfaces with a photovoltaic (PV) generator. The proposed control method ensures high‐quality output voltage/current waveform in online and/or offline operating modes. Moreover, the proposed control provides a seamless and swift transition from standalone to grid‐connected and vice versa. The exhibited control scheme is simulated with MATLAB/Simulink. Real‐time …