An Increment-Based Online Distributed Optimization Method for Distribution Networks with High PV Integration

摘要

To deal with the voltage problems emerging in distribution networks with high photovoltaic (PV) integration, this paper proposes an increment-based online distributed optimal power flow (OPF) algorithm to improve the voltage profiles, while improving the accuracy of the objective value aiming at maximizing the social welfare of distribution networks. This algorithm is developed based on the transmission of price incentive signals from the distribution system operator (DSO) to PV owners, which then drive the PV owners to regulate output increments and send the output increments back to the DSO. It not only can protect the private information of distributed PVs from being exposed to the DSO but also enhances the robustness of the distribution network to the grid-connected scale of PV systems. The numerical test results demonstrate the above merits of the proposed algorithm.