Operation optimization of multi-voltage-level AC-DC hybrid distribution network with multi-layer consumption of photovoltaic generation

With the fast growth of photovoltaic equipment, the flexibility and photovoltaic consumption ability of traditional distribution networks are insufficient. AC-DC hybrid distribution network is more flexible and can promote photovoltaic consumption effectively. However, current research on AC-DC distribution network optimization mainly focuses on network with single consumption path. Therefore, this paper proposes a multi-voltage distribution network structure with multiple consumption paths. Multiple consumption methods based on DC distribution lines and energy storage systems are considered. Then, a bi-level optimization model of the proposed structure is established to upgrade the operation performance. The normal boundary intersection (NBI) method and the fuzzy membership function method are adopted to realize the multi-objective optimization. Finally, a case study is conducted to validate the effectiveness of the proposed model.