Authors: Grace Sadhana, Ashok S., Nikhil Sasidharan, Saifur Rahman and Kumaravel S.
Conference: 2020 6th IEEE International Energy Conference (ENERGYCon)
DOI: https://doi.org/10.1109/ENERGYCon48941.2020.9236529
Abstract: The coordinated and efficient operation of Solar PV system combined with battery storage systems makes a standalone DC Community Grid stable and reliable. The accurate power sharing between the distributed renewable energy sources of a DC community grid according to the available source and load demand is managed through droop control algorithm and droop resistance adaptable to the variations in the sources (Uncertainties in Solar Power). This paper presents an adaptive droop control algorithm developed based on the existing source converted as the reference current for operating the converters to meet the demand. The changes in the output potential of each converter is controlled and is maintained constant throughout the operation of DC community grid and makes it stable. The proposed control algorithm is implemented to the system individually to make it a communication less control. The adaptive droop control algorithm relies on the local measurement data from each converter like, output voltage, current, rated load current and DC Bus voltage. The control strategy is applied to a simple DC microgrid representing a local community grid with solar PV as the source and battery as the support system on standalone mode of operation developed using MATLAB-Simulink® and is validated for three different power sharing scenarios.