Research on Large-scale Photovoltaic Planning Based on Risk Assessment in Distribution Network

Risks caused by large amounts of distributed photovoltaic (PV) feeding into distribution networks, have an impact on PV planning, which has become a critical consideration for distribution networks’ operation. In this paper, a large-scale PV planning method is proposed which based on risk assessment in distribution networks. Cluster division is used to group large-scale distributed PVs. A risk assessment is performed on the distribution network, considering the correlation between PVs and loads. The effects of load fluctuations, PV quantity, capacity and location on the operational risk of the distribution network are analyzed and discussed. A large-scale PV planning model is established with the goal of maximizing the comprehensive benefits, considering the penalty cost of node voltage over-limit and branch power flow over-limit risk. Finally, the genetic algorithm is used to solve the planning model. The simulation results demonstrate the effectiveness of the proposed method.