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논문 기본 정보

자료유형
학술대회자료
저자정보
Man-Seok Son (Gana Eng Institute) Ho-Seung Jin (Gana Eng Institute) Dae-Seok Rho (Korea University of Technology & Education) Jae-Ha Ko (Green Energy Institute)
저널정보
대한전기학회 대한전기학회 학술대회 논문집 2020년도 대한전기학회 스마트그리드연구회 추계학술대회
발행연도
2020.11
수록면
54 - 57 (4page)

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초록· 키워드

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MVDC(Medium Voltage DC) distribution system has been on the rise for large transmission capacity with low energy loss, undersea power transmission, and so forth. Recently it has been a key part of renewable energy transmission in the smartgrid. However, in the process of the design and the implementation of the protection for the grid, engineers face the difficulties to find MVDC equipments, especially commercialized protection coordination devices, such as DC hybrid CB, solid state CB, VCB, ACB, MCCB, fuse, power contactors(CTR), etc. And those equipments have generally provided the narrow range of the DC rated voltage and the rated current and the power capacity, and given few types of the protective relay with narrow range. It gives a big restriction to design the protection elements and apply the equipments into the grid. This paper presents the protection coordination methods and prepares the actual application for 5kV MVDC grid with distributed generators(DG). The simulation and calculation have been done, the breakers and contactors are chosen, and the setting values of their protective relays and peripherals are found. Now those equipments are in the process of shipment. All of them will be built into the MVDC grid in the site of Naju in the 5kV grid and the ±35 kV grid.

목차

Abstract
1. Introduction
2. Design of protection devices in 5kV MVDC microgrid
3. Operation method of protection devices in 5kV MVDC microgrid
4. Case studies
5. Conclusions
References

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