Power quality improvement of grid using PV solar farm by voltage injection method

摘要

Power quality is concerned with the ability of the power source to generate power which has less harmonic content and the magnitude of voltage and frequency is under tolerance level, with the continuity of supply. It has a vital role in deciding the size, rating and cost of electrical equipment. The load variation in the system causes change in the system parameters as well as variation in the power factor of the system. This variation in power factor may cause the distortion of the voltage and current in the system and hence, can deteriorate the power quality of the system. In this work power factor of the system for a particular loading condition has been improved with the solar farm. In this work the voltage has been injected in quadrature with the system current and the magnitude of the injected voltage has been increased in steps so to achieve the desired value of power quality. The complete work has been carried out in three stages. In first stage of the work PV solar farm has been designed and MPPT has been done with fuzzy logic controller. In the second stage, MLI has been designed to produce sinusoidal waveform and in the last stage of the work the magnitude of the quadrature injected voltage has been varied. MATLAB / Simulink environment has been used for the solar farm design and analysis.