Photovoltaic Controller Design Based on Adaptive Volt/Var Algorithm to Stand the Impact of Load Increase in Grid Tied Microgrid System

Abstract

This paper presents an efficient design and real-time implementation of a controller for a large-scale grid-tied photovoltaic (PV) plant in a power system affected by disturbances. To direct the adequate amount of solar power, an Adaptive voltage and volt-ampere reactive (Volt-VAr) algorithm implemented in real-time using the Real Time Digital Simulator (RTDS) is proposed. An efficient and self-sufficient active and reactive P-Q power control scheme is proposed and implemented to transfer the generated power of the PV to the grid using a Voltage Source Converter (VSC). The proposed controller is implemented along with the PV system considered in RTDS to evaluate its effectiveness. By considering the impact of the disturbance caused by the load increase, the efficiency of the proposed power controller to transmit the generated power of the PV plant to the electrical grid system is investigated. It is observed that the hardware in the loop results verifies the advantage of the proposed method.