Modeling of Electric Components in Multi-terminal DC Distribution Network

Abstract

As the existing AC power system is faced with development bottleneck such as the integration of renewable energy sources, high power quality and so on, the introduction of multi-terminal DC distribution network in the future smart grids is of significant importance. This paper presents a novel modeling method of electric components from the view of control instead of the detailed modeling of each IGBT-based converter. Three models are put forward to imitate the electrical characteristics of load-converter module, source-converter module and DC transformer. The proposed three models can cover all electric components in the DC distribution network, which lays the foundation for the further research on the DC distribution network. A six-terminal DC distribution network is constructed in Mat lab/Simulink based on the three proposed models, which verifies the correctness of the proposed modeling method.