Adaptive Droop Control System for Automatic Voltage Restoration in DC Microgrids

Abstract

DC microgrids offer a potential solution for efficient and reliable energy sharing within local communities. Nonetheless, conventional control techniques employed in these systems are hindered by their inability to ensure optimal energy distribution and load balancing, particularly under conditions of fluctuating loads and renewable power sources. To overcome these problems, this paper presents an adaptive droop controller that adjusts the droop parameters in real time using the primary current sharing loops to reduce the load current deviation and shifts the droop lines through the second loop to eliminate bus voltage deviation in DC microgrids. The proposed system adjusts its droop coefficients dynamically to regulate the load power. The performance of the proposed system is evaluated through PLECS software simulation. Simulation results show that the proposed system achieves better load balancing and stability compared to traditional control methods. Also, this study provides valuable insights into the development and implementation of adaptive droop control systems for automatic-energy sharing in DC microgrids, which can contribute to the development of sustainable and reliable energy systems in local communities.