1.State Grid Electric Power Research Institute Co., Ltd., Nanjing 211106, China;2.NARI Technology Co., Ltd., Nanjing 211106, China;3.School of Electrical Engineering, Southeast University, Nanjing 210096, China

In order to solve the problem of voltage overlimit at the feeder end of weak distribution network with high proportion of distributed generator, the voltage regulation strategy for distribution network considering automatic voltage control (AVC) limit adjustment is proposed from the substation perspective. Firstly, linearization modeling is carried out for the main adjustable equipment and the nine-zone diagram control strategy in the distribution network. Then, the Pareto front of the distribution network multi-objective optimization problem with AVC limit adjustment is solved by the enhanced Epsilon-constrained method. Finally, the proposed method is validated by an IEEE 33-bus standard case and a practical multi-feeder distribution system in Zhejiang Province, China. The results show that the proposed method can reduce the daily operation times of the adjustable equipment, increase the service life of the equipment, and effectively improve the voltage fluctuation of the distribution network with high proportion of photovoltaics.