FUZZY CONTROLLED SHUNT ACTIVE FILTER TO REDUCE HARMONICS USING SOLAR PV SYSTEM

Electrical Engineering

The development of new energy sources is continuously enhanced because of the critical situation of the chemical industrial fuels such as oil, gas and others. Thus, the renewable energy sources have become a more important contributor to the total energy consumed in the world. In fact, the demand for solar energy has increased by 20% to 25% over the past 20 years. The market for PV systems is growing worldwide. In fact, nowadays, solar PV provides around 4800 GW. Between 2004 and 2009, grid connected PV capacity reached 21 GW and was increasing at an annual average rate of 60%. In order to get benefit from the application of PV systems, research activities are being conducted in an attempt to gain further improvement in their cost, efficiency and reliability. Renewable energy resources such as solar and wind energies are becoming advantageous compared to the conventional sources of power production in many ways like they are eco-friendly, available in a huge amount, non-depletable, etc. But the only drawback is that their outputs depend upon the climatic conditions. Wind-Photovoltaic Hybrid System (WPHS) utilization is becoming popular due to the increasing energy costs and decreasing prices of turbines and PV panels. However to make up for the drawbacks back-up power is often necessary. This methodology also presents the implementation of a generalized photovoltaic model using Matlab/Simulink software package, which can be representative of PV cell, module, and array for easy use on simulation platform. The proposed model is designed with a user-friendly icon and a dialog box like Simulink block libraries. This makes the generalized PV model easily simulated and analyzed in conjunction with power electronics for a maximum power point tracker. Taking the effect of sunlight irradiance and cell temperature into consideration, the output current and power characteristics of PV model are simulated and optimized using the proposed model. This enables the dynamics of PV power system to be easily simulated, analyzed, and optimized. This method present, the active filtering capability that can be incorporated in grid connected photovoltaic systems by proper control of the grid interfacing inverter. Fuzzy logic controller is used for generating the reference signals to control the inverter so that the system feeds the available photovoltaic energy into the grid, provides reactive power compensation and harmonic elimination of the loads connected at the point of common coupling. The controller is tested in MA TLAB/SIMULINK for linear and nonlinear loads. The simulation results demonstrate the efficient working of grid connected photovoltaic system as Shunt Active Filter.

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