A Novel AC-DC Hybrid Distribution Network Topology and its Characterization Analysis

Abstract

With the extensive access of distributed new energy and the continuous growth of new loads, AC/DC hybrid distribution network has become a research hotspot of new distribution network. The choice of topology is very important for the construction of AC/DC hybrid distribution network. Accordingly, this paper proposes a new AC/DC hybrid distribution network topology based on the actual needs of a demonstration project. The structure combines the advantages of annular structure and radial structure, which can provide a more efficient and stable construction scheme for AC and DC power supply systems with multiple voltage levels and multiple bus structures. In this paper, various characteristics of the structure are studied through simulation analysis. The results show that the topology distribution network can quickly recover to a stable working state in the face of voltage changes caused by source-load switching and can effectively cope with the fluctuation of photovoltaic output in the system due to environmental changes, which in turn leads to voltage fluctuations. In addition, the distribution network of this structure has a high power transmission efficiency.