Control of Grid Connected Inverter with PR Controller and LCL Filter for Interfacing Renewable Energy Sources

Abstract:

This paper presents a design procedure for Proportional-Resonant (PR) controller and a third order LCL filter which decide the performance of the converter that is used to interface the renewable energy source to the grid. The primary focus of the paper is to evaluate the performance of the controller with the filter for a microgrid application. A scaled down model of microgrid available in the department laboratory is considered for the performance evaluation of the designed controller. The system is simulated with a 2kVA PWM inverter and tested under conditions such as change in grid impedance, grid frequency and step change in reference current. The simulation results show that the PR controller with LCL filter tracks the reference with zero steady state error and the controller is found to be immune to grid frequency and micro-grid configuration changes.

• Periodical: Advanced Materials Research (Volumes 984-985)
• Pages: 979-989
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.984-985.979
• Online since: July 2014
• Authors: K. Deepthi*, A. Vijayakumari, Arun Joshy
• Keywords: Distributed Generator (DG), LCL Filter, Microgrids (MGs), PR Controller

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