Construction Scheme and Operation Simulation Analysis of Hybrid AC-DC Distribution Networks with High-Proportion Photovoltaics

The high proportion of distributed photovoltaic connected to the urban distribution network generates power return and voltage limit problems, as well as the capacity mismatch caused by the scale of renewable energy charging piles connected to the station area under the background of new infrastructure, which brings new challenges to the operation control of low-voltage distribution network. At present, the urban distribution network has problems such as load density, high load, expansion difficulty, etc. The low-voltage AC-DC hybrid distribution network has flexible power regulation capability, so the construction frame scheme of source-net load-storage AC-DC hybrid distribution network is proposed to realize the flexible regulation of power dynamics among multiple zones. In this paper, CloudPSS-IESLab2 software is used to simulate the operation, analyze and evaluate the impact of source-grid-load-storage AC-DC on the power quality of distribution network, and verify the feasibility of the proposed construction scheme.