Control and operation of grid connected DC source based distributed generation

Grid connected operation of Distributed generation (DG) is yet another approach to provide reliable and secured power. The operational issues of grid connected DG is the focus of research at present to achieve adequacy and security. The islanding is the situation where DG continues to operate with the utility disconnected. It is customary to detect islanding when it occurs to ensure continued stable operation along with safety of linemen and the customers' equipment. This paper deals with the DC source based DG integrated with the utility and operates in grid connected and intentional islanding mode. Passive islanding detection technique is used to detect the islanding. The DG operates at grid voltage and frequency. Intentional islanding is tested by developing the model for seamless operation using MATLAB/Simulink environment and results are obtained. The simulation results validate the effective operation of the proposed controller and power electronic devices.