Active and reactive power control in three phase solar PV inverter using modified IC method

With the increment of solar photovoltaic installation in power grid, solar power penetration level, over loading of grid and power fluctuation are becoming prominent issues. To address the problems, active and reactive power fed to the grid from solar inverter are needed to be controlled. Regulation of active power from solar inverter is performed by modifying maximum power point tracking algorithm of photovoltaic generation and run in off maximum power mode. To operate the solar plant in off maximum power mode, fractional voltage based modified incremental conductance method is introduced in this paper. The solar photovoltaic inverter over which this active power control is operated, is modeled in MATLAB/Simulink and this model is tested for real irradiance and temperature conditions. Reactive power control is also performed in standard test condition. Simulation results illustrate the desired limited active power injection into the grid from solar photovoltaic system and reactive power ancillary support as well.