Analyzing the effects of converter and DC line outages due to Distributed Voltage Control in AC-MTDC Distribution Network

Abstract

Technological advancements in power electronics devices in recent years and the increase in the integration of distributed energy resources (DER) due to green energy awareness has transformed the conventional power network into a sophisticated and smart network. With the large-scale integration of sensitive DC load along with AC, and availability of DER with AC and DC type outputs results in an inevitable shift to develop an efficient and reliable layout for a distribution network known as AC-MTDC distribution network. In this paper, an AC-MTDC distribution network is realized to perform the load flow analysis, employing voltage source converter (VSC). A distributed DC voltage control technique is also implemented on VSC based AC-MTDC distribution network, and its effects are analyzed considering the converter and DC line outages for various network scenarious. A modified IEEE 33-bus AC-MTDC distribution network with VSC is considered for this study, and results are analyzed according to power sharing requirement and operational efficiency using MATPOWER, an open source power flow package.