Multilevel D-STATCOM for Linear and nonlinear loads to compensate reactive and active power during operation of distribution systems

Voltage fluctuations in the power system mainly result from impedance of transmission lines, loading types, and uneven distribution of single-phase loads. The scenarios become much severer in the low-voltage micro-grid system due to reverse power flow contributed by distributed generations (DGs) in either three-or single-phase connection. This paper presents an Implementation of Multilevel D-STATCOM to compensate Active and reactive power generated in the transmission line. A proportional-resonant current regulator with selectively harmonic compensation is realized to control the fundamental current of the D-STATCOM as well as reduce the harmonic current, which could be an advantage in practical applications due to high voltage distortion in low-voltage micro grids. The corresponding loads with linear and non-linear property are applied and tested for results by using Matlab/Simulink model for effective outputs.