A generalized droop control approach for islanded DC microgrids hosting parallel-connected DERs

A great attention is dedicated to design a generalized droop control approach contributing to proper load current sharing and voltage regulation in DC microgrids (MGs). The established approach is based on fundamental principles of parallel-connected distributed energy resources (DERs) equivalent circuit ending in a general method effective for different interconnection schemes. Accordingly, proper load sharing and voltage regulation are pursued in DERs with different power ratings and different cable impedances. Moreover, the proposed approach is apt to be operated in both load current and power sharing modes. Comparative studies are conducted to evaluate performance of the proposed approach regarding these two control strategies and highlighting the possible differences. Accordingly, the desired control and technical requirements could be accommodated, effectively. Detailed simulation studies are conducted and compared with each other to interrogate performance of the proposed approach. Results are discussed in depth.