Voltage regulation in mircogrid using adaptive controller

Abstract

Due to fossil fuel depletion, power shortage has become a major problem in the world. This increases the importance of Distributed Energy Resources (DERs) among the consumers which in turn led to the expansion of microgrid. Microgrid operates in grid-connected mode as well as in islanded mode. Microgrid is connected to main grid in grid connected mode. In islanded mode, there is no such connection and hence the microgrid operates independently. Microgrid may move to islanded mode intentionally or unintentionally. Power in the grid is not constant which in turn affected the loads connected to the grid. Due to the Sun light variation the voltage output from the grid may not be constant. In three phase microgrid, fault in one phase causes loss of voltage stability in other two phases. PID Control has been used for microgrid voltage control but it does not work properly during fault conditions. So, an adaptive PI controller has been proposed to provide voltage regulation in microgrid which provides better performance under all the circumstances. The performance of the system employing adaptive PI controller is validated using the results obtained from the MATLAB Simulink.