Variable Angle of SRG for Wind Energy Control Application

Abstract

Switched reluctance machine has various desirable features, which comes from its simple construction. They are the wide speed range, high temperature operation and small moment of inertia. There are many control variables, such as: firing angles, reference current, speed and voltage. This paper presents a nonlinear model of 6/4 Switched Reluctance Generator (SRG) with two converter (one with generator side and other with grid side) based on wind Energy system. This system provides a new approach to maximize the amount of power generated. Closed loop control with based PI current Control model is used. A Power converter in SRG can be produced maximum power efficiency and minimize the ripple contents in the output of SRG depend on the converter angles. A second power converter namely PI based controlled PWM inverter is used to interface the machine to the Grid. This system proposed feasibility and validity are simulated on MATLAB/SIMULINK. Keywords—Wind Energy, SRG, SHB, and VSC. was performed based on control of two separate converters. The control of the converter connected to SRG regulates the extraction of electrical power to be generated and the control of the converter connected to the grid is responsible for regulate the transmission of the generated energy to the grid. Fig. 1, shows 6/4 SRG. The winding A-A' in Fig. 1 is one of the machine phases. Fig. 2 shows the idealized inductance profile of a SRG. If saturation is neglected then the inductance varies linearly with respect to the overlap between the stator and rotor poles. The inductance is maximum when the rotor and stator poles are fully aligned and minimum when the poles are completely unaligned. For generation, the machine phases are excited during the negative slope of the inductance profile, (2). Fig. 3 shows the block diagram of the system. It is consist of wind turbine, SRG, asymmetric H-Bridge (AHB), and PWM inverter with control system