Coordination Control Strategy for Power Management of Active Distribution Networks

This paper proposes a hierarchical coordination control strategy for solving the power management problem of an active distribution network with high penetration of distributed generation. The proposed strategy is intended to achieve four aims: 1) regulate the common coupling point demand at given references; 2) share the active power among power generation sources; 3) balance the voltages among controllable energy sources; and 4) recover the battery energy storage system's state-of-charge. The main contribution of the proposed strategy is that it can regulate both the active and reactive power injection at the common coupling point by coordinating the controllable energy sources such that the distribution network can be scheduled as an adjustable PQ node. The strategy considers the interests of three groups including the operators of power system, independent investors of distributed generators and the users in the distribution network. Sufficient conditions for the strategy are presented. Theoretical analysis and simulation studies are provided to illustrate and validate the effectiveness of the proposed strategy.