Design and Control of Grid Connected Solar Photovoltaic System

Abstract

SRF technique is the process of converting a rotating quantity into a newlinestationary quantity by the process of rotating the angle of reference. The above newlineconcept can be better understood by considering a three phase generator newlinerotating at synchronous speed. The axis of the rotor rotates continuously and newlinehence the poles are continuously displaced by an angle which varies newlinecontinuously. One can assume a reference frame which also rotates at newlinesynchronous speed. The three poles which were rotating earlier is now newlinestationary with respect to this reference frame. This concept is called newlinestationary reference frame or synchronous reference frame. This method was newlineproposed by Clark and it is also called as Clark s transformation. The abc newlinerotation of a three phase signal is converted to direct-quadrature-zero (dq0) newlinequantities. The advantage of this conversion is simplification of calculation as newlinean AC quantity is treated as a DC quantity thereby reducing trigonometric and newlinegeometric manipulations. newline