Optimal Distributed Coordination Control of Multiple Photovoltaic Generators in Distribution Networks

In this paper, a class of coordination control problems of power system in distribution networks is addressed. The multiple photovoltaic generators (PVs) in network are expected to be operated in a certain level, namely Fair Utilization, in order to provide reliable power of high quality. In other words, the occupancy ratios of all PVs that are determined by the current active and reactive power outputs in terms of the capacities of each PV, are required to be driven to a specified reference level. Towards this end, a totally distributed, analytical and optimal coordination strategy is proposed to achieve this goal. Comparing with the existing approaches, the distinct merit of the proposed algorithm is the sense of optimality, which really minimizes the control effort. In addition, an inverse optimal control method is elegantly adopted for this coordination control formulation and the rigorous proof of stability as well as optimality are explicitly provided. In the end, a radial distribution network simulation is carefully elaborated and the validity of proposed algorithm is examined as well.