Harmonics and Reactive Current Detection of a Grid Interfaced PV Generation in Distribution System

The extraction of harmonics and reactive current components in a grid interfaced photovoltaic (PV) system is proposed in this paper. The proposed method is based on triangular function, which is useful in signal processing and provides harmonics and reactive current detection to estimate reference currents to control grid connected PV system. The proposed method is modeled and implemented in order to meet the grid requirements such as power quality (PQ) improvement, distortion free signals etc. The proposed technique for a three phase grid connected PV system is used to perform multi-functions including, improved power quality, extraction of maximum power from a given PV array and feeding extracted solar PV power into the distribution system. Test results have vetted desirable performance of the proposed system