Enhancement in the Quality of Power of a Grid Tied Solar PV System Using Recursive Digital Filter Based Control

Abstract

The primitive intent of this project is to establish a governing strategy for transmission of active power between a solar photo-voltaic (PV) array and the load or the grid, simultaneously to improve power efficiency by abolishing harmonics and compensation of reactive-power needed by the attached load in the network of distribution. Due to the integration of renewable energy sources, low Power-Quality (PQ) issues at the Point-Of-Intersection (PIC) are becoming more prominent in terms of voltage and current harmonics. The controlling by Recursive-Digital-Filter is incorporated here for PV-grid connected device upgrades indices of PQ by running around clock and maintaining transmission of power between the grid of utility and loads which are associated. The strength of governing algorithm relies in its ability to switch VSC efficiently by generating currents of grids as reference using an indirect-current-control-technique. The currents of load are processed using a Recursive-Digital-Filter, which extracts active power portion. In this method, the components of load current’s active power are used to generate currents reference of grid. The output of system is noted for changing loads, altering insolation of solar, and Voltage-Swell, Voltage-Sag, and distortion situations of voltage in a laboratory prototype.