배전급 DC 전력망 및 적용 개소 분석을 통한 DC 그리드 전기안전 요소 기술 고찰

Abstract

Due to the rapid increase in renewable energy sources and the need to accommodate and utilize them, the construction of MVDC distribution networks is required as a core technology, and related research and development budgets have been established and industry-academia research and development is actively underway. However, since the MVDC distribution network is directly connected to the receiver, research and development of electrical safety management technology is essential for the stable operation of the DC grid and the spread of its use. In this study, as a basic step for establishing a DC grid electrical safety strategy policy, we aimed to comprehensively analyze the electrical safety-related items and implications required for the DC grid to be built in the future through an analysis of the application status, application methods, and core element technologies to be pursued for electrical safety, focusing on the application points where the DC grid is currently commercialized or planned to be commercialized. To this end, we focused our research and analysis on DC electric railways, DC electric propulsion ships, and DC buildings where DC power grids are currently being built or constructed. Based on this, we conducted an in-depth analysis of the main safety factors to be considered from a system perspective in the application of DC grids, explored how the DC grid will be organized in the future, and presented technologies for DC grid electrical safety elements that require research and development. Copyright © The Korean Institute of Electrical Engineers.