Robust Planning of DC Distribution Lines and Energy Storage Equipment in Distribution Networks Considering Photovoltaic Consumption

The fast growth of photovoltaic equipment brings challenges to the traditional AC distribution network with low operation flexibility. Fortunately, DC distribution technology and energy storage equipment are beneficial for enhancing the control ability and the photovoltaic consumption ability of an AC distribution network. However, current research on distribution network planning has given little consideration to the large-scale access of photovoltaic equipment and the coordination of DC distribution lines and energy storage equipment. Therefore, this paper proposes the planning model of DC distribution lines and energy storage equipment in distribution networks considering the full photovoltaic consumption. The proposed model considers the coordination of DC distribution lines and energy storage equipment to consume photovoltaic power through multiple paths. Then, the uncertainty of photovoltaic power and load is considered, and a robust planning model is established. Finally, the effectiveness of the planning model has been validated based on a case study. The result illustrates that this model can improve the photovoltaic consumption ability with minimal total cost. This research is significant for the construction of the AC/DC distribution network.