±35kV MVDC 스테이션의 실제 지락사고 및 시뮬레이션 비교분석에 관한 연구
A Study on Comparative Analysis of Real and Simulated Ground Fault Events at ±35kV MVDC Stations
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초록
The MVDC distribution is a promising solution for future decentralized electrical networks with a large amount of distributed renewable-energy generation and storage systems. Recently, demonstration projects on an MVDC distribution network have been actively carried out to increase the capacity of an existing AC distribution system. However, since there are no specific protection guidelines for an MVDC station, which is a key facility for power conversion, operation methods of protection devices are required. In this paper, in order to analyze the accident characteristics of the distribution system of the MVDC distribution network, we compared and analyzed the ground fault accidents that occurred in the actual MVDC system and the simulation results. A comparative analysis was performed based on simulation results when a ground fault occurred in the DC link of a 30MW±35kV rated MVDC system and measured values when an actual ground fault occurred.
Abstract
The MVDC distribution is a promising solution for future decentralized electrical networks with a large amount of distributed renewable-energy generation and storage systems. Recently, demonstration projects on an MVDC distribution network have been actively carried out to increase the capacity of an existing AC distribution system. However, since there are no specific protection guidelines for an MVDC station, which is a key facility for power conversion, operation methods of protection devices are required. In this paper, in order to analyze the accident characteristics of the distribution system of the MVDC distribution network, we compared and analyzed the ground fault accidents that occurred in the actual MVDC system and the simulation results. A comparative analysis was performed based on simulation results when a ground fault occurred in the DC link of a 30MW±35kV rated MVDC system and measured values when an actual ground fault occurred.
참고문헌 (7)
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- M. Monadi, "Implementation of the differential protection for MVDC distribution systems using real-time simulation and hardware-in-the-loop", 2015IEEE Energy Conversion Congress and Exposition, pp.3380~3385 (2015)
- Coffey, Sophie, "Review of MVDC applications, technologies, and future prospects", Energies, 14(24), pp.8294~ (2021)
- Zheng, Liran, "Current-source solid-state DC transformer integrating LVDC microgrid, energy storage, and renewable energy into MVDC grid", IEEE Transactions on Power Electronics, 37(1), pp.1044~1058 (2021)
- 김래영, "MVDC 배전망 구축 및 운용을 위한 전력기기 개발 현황", 전기의세계, 70(10), pp.14~18 (2021)
- 오정식, "±35kV MVDC 스테이션의 실제 운전에 따른 데이터 분석", 공학기술논문지, 16(3), pp.143~148 (2023), 공학기술연구원[DOI]