An efficient control and harmonic level minimization for hybrid renewable energy system

Abstract

Renewable energy sources play an essential role in electric power generation and distribution systems. Among the other energy sources, wind and solar energy are the most widely used renewable energy resources. Solar power system is constructed using PV cell array and provides irregular DC power according to the solar illumination. Wind power system using wind turbine provides irregular AC power according to wind flow. There are different structures for the type of generators used with Wind turbines depending on speed factor, fixed speed generator and variable speed generators. With fixed speed generators there are problems like consumption of considerable amount of reactive power from the network which leads to voltage instability and the other is the dependence of wind farm output power on the wind speed fluctuations, which leads to system instability. Since power generated by both of these systems are varying which need some special controlling mechanism to handle the power transmission to load. It is well known that three-phase AC is generally used to transport the electricity. During the transportation, both the active power balance and the reactive power balance must be maintained between generating and utilizing the AC power. Since the renewable source for power generation system output is unregulated it includes more noise at inverter output. The major problems in traditional power conversion schemes are the poor line power factor and harmonic distortion in line and machine currents. It is important to ensure the quality of the electric power and optimize the performance of electrical equipment. The recent IEEE Standard 519 severely restricts line harmonic injection. Therefore, it is important to satisfy the stringent harmonic standard and rectify poor power factor Renewable energy sources play an essential role in electric power generation and distribution systems. Among the other energy sources, wind and solar energy are the most widely used renewable energy resources. Solar power system is const