Modeling and fault simulation of active distribution network based on RTDS

Abstract

Active distribution networks (ADN) connect many distributed generators (DG), and compared with traditional distribution network, running state and fault characteristics of ADN change greatly, especially the ADN with connection of inverter-based DG (IBDG). To analyze and test the protection applicability in ADN, a model of ADN with IBDG is established based on RTDS in this paper, including primary system of distribution network, photovoltaic (PV) generation and control strategy for grid-connected inverter. Based on this model, both the characteristics of normal and fault condition are simulated and analyzed, and then compared with traditional distribution network. Meanwhile, based on the ADN model platform, a close-loop test for the protection device we developed is introduced briefly.