In order to solve the voltage off-normal problem caused by the integration of high penetration distributed photovoltaic (DPV) into AC/DC distribution networks

as well as the problem that the existing centralized voltage optimization mode cannot meet the real-time optimization requirements of distribution networks

a multi-time scale distributed voltage optimization method is proposed. Firstly

an improved modular function is used to cluster the AC/DC distribution network

and a long-term centralized voltage optimization model is established. The model is then subjected to cone optimization to optimize the output plan of long-term voltage regulation equipment and flexible loads.Then

based on the previous optimization

a distributed voltage rolling optimization model with a short-time scale within the day is established. According to the clustering results

the synchronous alternating direction multiplier algorithm is used to solve the problem and reduce the voltage fluctuations within the day. Finally

simulation analysis is conducted on the modified 50-node AC/DC hybrid distribution network. The results indicate that the proposed voltage optimization method can be used to effectively improve the the off-normal situation of voltage and increase the DPV consumption.