Active damped LCL filter based DSTATCOM with reduced sensors

This paper deals with active resonance damping of LCL-filter-based DSTATCOM with reduced number of sensors, which can effectively compensate non-linear load harmonics, reactive, negative sequence current and neutral current in three-phase four wire distribution system. With an LCL-filter, additional switching frequency current components can be reduced more effectively. However, because of the resonance phenomenon of the supply filter and the DSTATCOM wide operating bandwidth, the use of the LCL filter in DSTATCOM is challenging. By selecting two similar inductance, LCL-filter design becomes more simpler. The entire system is numerically simulated using MATLAB/SIMULINK platform and the results showing the feasibility and stability of DSTATCOM LCL-filter with reduced number of sensors is presented.