A Robust Generalized Modified Blake-Zisserman Adaptive Filter-Based Control Scheme for Grid-Tied PV System to Improve Power Quality

This paper presents a robust generalized modified Blake-Zisserman adaptive filter (GMBZAF)-based control scheme for a three-phase grid-tied single-stage photovoltaic system (GTPVS) to improve power quality (PQ). The GMBZAF-based control scheme enables GTPVS to integrate maximum PV power into the grid with power quality (PQ) improvement at the grid side, such as maintaining balanced sinusoidal grid currents, current harmonics mitigation, reactive power assistance to the inductive load at steady-state, and even during dynamic conditions (variable load and irradiance). The GMBZAF is implemented to accurately calculate the active and reactive weight components of load current. The GTPVS is modeled using MATLAB/Simulink, and its response is observed at steady-state, unbalanced loading, and variable solar irradiance conditions. The comparative assessment between the proposed control scheme and the existing adaptive filtering-based control schemes such as least mean square (LMS) and least mean fourth (LMF) is done.