Oscillation Reduction in Frequency Response of a small Utility System using PV Generator

The solar photovoltaic systems are becoming the most preferred choice for the renewable source of energy because of their easy installations and direct energy conversion. However with the increased number of grid connected solar units, soon in the coming future the grid stability will depend on solar photovoltaic units. In this paper a control scheme is proposed in which the photovoltaic generator participates in maintaining the frequency of the small utility system when subjected to load changes. To accommodate the climate dependent performance behavior of photovoltaic generator it is operated under the sample solar data of Chennai, India. In this paper, frequency control of the utility system is implemented by diverting the power of solar units to the utility system for the time periods the system is under stress. The proposed controller is based on the suggested algorithm and the simulation results indicate the reduction in oscillations in the frequency response of the utility system. The model performs better when the solar irradiance levels are highest. In the paper work has been carried out on the SIMULINK platform in MATLAB. Future work includes implementing the hardware model of the proposed control scheme.