The local voltage control in Distribution Generation (DG) is most important task. The proportional – Integral (PI) controller is used to control the voltage of three phase inverter in Distributed Generation System. The system is expressed on d-q frame transformation for MATLAB-simulink. The proposed work is to analysis Distributed Generation Voltage Source Inverter-DGVSI in time and frequency domain. The gain of standalone solar inverter conventional controller is determined by Ziegler Nichol’s, filter parameter time constant and PID tuner in MATLAB. The analysis is done with the help of results found by step response, frequency response and output voltage waveform. The studied system is modeled, simulated and analyzed in MATLAB-SIMULINK environment.