DC Link Voltage Stabilization in Renewable Source Connected DC Micro Grid using Adaptive Sliding mode Controller

Abstract

This paper discusses about DC voltage stabilization in a DC micro grid with multiple renewable source connected to the system. The sources include solar panels, super capacitor and battery as sources which operate a brushless DC motor for water pumping application. The solar panel source is connected to Zeta converter controlled by voltage oriented control updated with adaptive sliding mode controller for better DC voltage stability. The proposed topology is modeled with conventional and adaptive sliding mode controllers. Both topologies are compared with improvement in parameters of the system using time domain graphs plotted using ‘powergui’ toolbox in MATLAB software.