Control Strategy for Load Sharing in Distributed Generation System in Parallel Operation

This paper presents a control strategy for parallel operation of distributed generation system. The proposed control technique, is based on the modified droop control method without any interconnection. This method is usually applied to achieve proper active and reactive power sharing when communication between each of distributed generation is difficult due to its physical location. In this paper investigate active and reactive power sharing of parallel operation. The power sharing is achieved by adjusting the frequency and voltage amplitude of each unit. Each unit has its own controller then the total active and reactive power can be shared by each unit in proportion with their rated power. Simulation results show that the proposed method is effective in displaying a reliable and control performance. A system consisting of three distributed generation represented by inverters has been simulated in MATLAB/Simulink. Different cases of power rating and load condition are verified by the simulation results.