PI And PR Controller for Grid Connected Voltage Source Inverter

Abstract

Over-the year, power converters have found wide application in grid-interfaced systems, including distributed power generation systems with a renewable energy source. In a distributed energy system like a solar hydro or any diesel generation where the output of the system is DC and is expected to be converted in an AC, an inverter is used. There are various mode to have a controlled output of the inverter. We will study the three-phase voltage source inverter control scheme. The different control methods used are PI controller and PR controller. The main advantage of the PI controller is that there will be no remaining control error after the set point change or a process disturbance. In a PI control the stationary reference frame is used to transfer feedback quantities, where the decoupling of components requirements increases the complication, a new proportional reason and control strategy is employed, in which of second order very high gain ideally infinite gain is introduced at a fundamental frequency. The main advantage of the PR controller is to be reduced DC steady state error to a zero by forcing the ideally infinite gain at the resonating frequency. We will compare the PI and PR controllers and simulation in MATLAB.