Constant Power Load Stabilization in DC Microgrids Using Continuous-Time Model Predictive Control

Despite its advantages over AC counterparts, DC microgrids present a lot of challenges. One these challenges is the instability issues caused by constant power loads (CPLs). CPLs deteriorate system’s performance due to their incremental negative impedance characteristics. In this paper, microgrid composed PV/battery system feeding pure CPL was considered. A continuous-time model predictive control combined with disturbance observer applied DC–DC bidirectional converter. The purpose composite controller address nonlinearity and maintain stability in large operating region under load PV generation variations. To show system, several tests were performed Simulation results good terms transient response, optimal tracking, region.