Enhancement of Power Quality in Industrial Distribution Systems using Photovoltaic Distributed Generation

Customers of utilities are increasing and consuming more energy, so they require good and reliable supply of energy. Consequently, the concept of distributed generation (DG), especially solar or PV system is used to generate localized power nearer to the industrial load center. Unfortunately the industrial network includes highly varying, nonlinear loads. For example, high power rectifiers used for electrolytic refining process of metals, massive variable frequency drives (VFD), and electric arc furnaces, these nonlinear loads inject harmonic currents into distribution network which cause power quality problems. In this paper, a new approach for harmonics elimination is developed using the grid connected photovoltaic model on the Simulink. By controlling the DC-AC converter to inject the same harmonics as those resulted from the nonlinear loads, the total harmonic distortion (THD) of the grid current will be enhanced.