Continuous Mixed p-norm Control Scheme with Reweighted L0 norm Variable Step Size for Mitigating Power Quality Problems of Grid Coupled Solar PV Systems

In this paper, the performance of a two-stage three-phase grid coupled solar photovoltaic generating system (SPVGS) is analyzed by using a novel reweighted LO norm variable step size continuous mixed p-norm (RLO-VSSCMPN) of a voltage source inverter (VSI) control scheme. The efficacy of the system is determined by considering unbalanced grid voltage, DC offset, voltage sag and swell, unbalanced load and variations in solar insolation. RL
0
-VSSCMPN is used for inverter control and it extracts fundamental components of load current for generating the reference grid current with a faster convergence rate and lesser steady state oscillations. With the proposed control, harmonics in the grid current follows the IEEE-519 norm and the performance is also satisfactory under varying environmental/load conditions. The power generated from SPVGS is transferred optimally using a DC-DC boost converter utilizing the incremental conductance (INC) maximum power point technique. The proposed system is simulated using MATLAB/Simulink 2018a and test results are verified experimentally using dSPACE1202 in the laboratory to ensure the validity of a novel proposed robust RL
0
-VSSCMPN.