Power Quality Assessment of Grid Connected Photovoltaic System on Power Factor

Abstract

This paper describes prediction of power factor (PF) on Grid Connected Photovoltaic (GCPV) power systems towards Malaysia climate variations (solar irradiance) by using Mathematical model. The mathematical model was developed by using a phasor diagram under three different cases. Each case presents different possibilities of GCPV system current flow and power factor characteristic towards solar irradiance condition. Each mathematical equation was derived from a phasor diagram which utilize solar irradiance as the input and power factor as the output. The verification on the accuracy of the proposed model is conducted based on real data measurement on the GCPV system which located at Green Energy Research Center (GERC), University of Technology MARA (UiTM) Shah Alam, Malaysia. Based on the comparative study and statistical approach, it shows a good agreement between actual and prediction data. Besides, the development of the proposed model provides an effective method for prediction mainly on the power factor characteristic of GCPV system and feasible in time under the same accuracy.