Communication-less Model Based Distributed Control for DC Microgrids

With the penetration of renewable energy, the electrical grid tends to be more flexible and distributed. Microgrid is a promising solution to deal with the rising challenges in distributed generation. Droop control is often adopted to handle power sharing for distributed generation control in microgrids, however it cannot guarantee required sharing accuracy and power quality to critical loads without using communication links. This paper proposes a method to achieve accurate current sharing without communication. One distributed generation (DG) is selected as a leader while the others are considered followers with a complete model of the leader. With the proposed method, the current can be shared with a desired ratio while the power quality remains unaffected. 