How to Implement Proportional Current Sharing in dc microgrid: Hardware Approach

In this video, the proportional sharing of load current in a DC microgrid is examined. The microgrid features two power sources supplying a common load. To achieve proportional sharing of load current between these sources, a droop control technique is employed. However, variations in cable resistances lead to a degradation in the performance of the droop controller, resulting in unequal sharing of load currents among the sources.
To address this issue, a secondary controller is introduced to compensate for the effects of interconnecting cables. This secondary controller incorporates a Proportional plus Integral (PI) controller that works to minimize the error between the actual source current and the average source current. The average source current is determined by calculating the mean of the source currents.
To facilitate communication and obtain information about the currents from the other source, a Controller Area Network (CAN) communication system is utilized.
Overall, the video explores how these control techniques and communication protocols are applied to ensure efficient and proportional distribution of load current in a DC microgrid context, despite challenges posed by cable resistances.