Fault operation of DC transformer for the PV medium voltage DC grid

Authors

Xinze XI, Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217 , China ；College of Electrical Engineering,Chongqing University, Chongqing 400044 , China
Zhi XU, Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217 , China
Shang GAO, College of Electrical Engineering, Southeast University, Nanjing 210096 , China

Keywords

photovoltaic, DC power collection and integration, fault analysis, DC transformer

Abstract

The power collection and integration system of medium voltage DC in the large PV is more efficient than the traditional AC collection system, which is the potential area to develop the photovoltaic resources in the future. As one of the key components of power collection and integration system with medium voltage DC, DC transformer is analyzed in detail in this paper, including the technical requirements, structure and control method from the collection system. Then, the corresponding fault clearance methods are proposed when the short circuit fault happens in the low voltage or high voltage side. Finally, a simulation for fault operation analysis of DC transformer is included to verify the feasibility and effectiveness of the proposed method.

DOI

10.19781/j.issn.16739140.2020.05.012

First Page

89

Last Page

95

Recommended Citation

XI, Xinze; XU, Zhi; and GAO, Shang (2021) "Fault operation of DC transformer for the PV medium voltage DC grid," Journal of Electric Power Science and Technology: Vol. 35: Iss. 5, Article 12.
DOI: 10.19781/j.issn.16739140.2020.05.012
Available at: https://jepst.researchcommons.org/journal/vol35/iss5/12