Analysis of grounding fault transient characteristics of medium-voltage DC distribution network with distributed photovoltaic

被引：0

作者：

He D. ^{[1
]}

Xu M. ^{[1
]}

Lan Z. ^{[1
]}

Wang W. ^{[2
]}

Zeng J. ^{[1
]}

Yu X. ^{[1
]}

机构：

[1] College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou

[2] College of Electrical and Information Engineering, Hunan University, Changsha

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 11期

关键词：

DC distribution network; distributed photovoltaic; fault characteristic; fault current; grounding fault;

D O I：

10.16081/j.epae.202303006

中图分类号：

学科分类号：

摘要：

When the distributed photovoltaic（PV）is connected to the direct current （DC）distribution network，the fault current distribution presents new characteristics. For this，the transient characteristics and influence mechanism of single pole grounding fault of DC-bus in medium-voltage DC distribution network with distributed PV are analyzed. The single pole grounding fault response process is divided into four stages：DC-side capacitor discharging stage，PV generator multiloop power supplying stage，PV generator freewheeling stage and inductance freewheeling stage. Based on the transient characteristics of the above four stages，the time domain expressions of the DC-side capacitor voltage and fault current in the process of each fault stage are derived. By analyzing the typical characteristics of fault current，it can be found that the magnitude of the fault resistance has a great influence on the amplitude of the fault current and the time to reach the peak. Finally，a simulation model of ±10 kV double-terminal DC distribution network with distributed PV is built in PSCAD／EMTDC，which verifies the correctness of the theoretical analysis. © 2023 Electric Power Automation Equipment Press. All rights reserved.

引用

页码：43 / 50

页数：7

共 16 条

[1]

LEE J Y, KIM H S, JUNG J H., Enhanced dual-active-bridge DC-DC converter for balancing bipolar voltage level of DC distribution system[J], IEEE Transactions on Industrial Electronics, 67, 12, pp. 10399-10409, (2020)

[2]

ZHENG Feng, ZHANG Jinsong, LIN Yanzhen, Et al., Fault iso⁃ lation strategy for multi-terminal DC distribution network based on novel flexible fault current limiter[J], Electric Power Automation Equipment, 43, 1, pp. 73-82, (2023)

[3]

FENG Xianyong, XIONG Q，, WARDELL D, Et al., Extra-fast DC distribution system protection for future energy systems [J], IEEE Transactions on Industry Applications, 55, 4, pp. 3421-3430, (2019)

[4]

JIANG Tao, ZHANG Donghui, LI Xue, Et al., Distributed opti⁃ mal control of voltage in active distribution network with dis⁃ tributed photovoltaic[J], Electric Power Automation Equip⁃ ment, 41, 9, pp. 102-109, (2021)

[5]

JIA Ke, CHEN Cong, LIU Ziyi, Et al., Protection of flexible DC distribution network based on single-end current transient and its setting[J], Automation of Electric Power Systems, 46, 6, pp. 144-152, (2022)

[6]

JIA Ke, LI Juntao, CHEN Jinfeng, Et al., Integrated fault ride through control for multi-port DC distribution system with dis⁃ tributed photovoltaic generation[J], Electric Power Automa⁃ tion Equipment, 41, 5, pp. 175-182, (2021)

[7]

FAN Xiaojie, CHI Yongning, MA Shicong, Et al., Research and application of key technologies and technical standards for large-scale offshore wind farms connecting to power grid[J], Power System Technology, 46, 8, pp. 2859-2870, (2022)

[8]

RAO Hong, ZHOU Yuebin, LI Weiwei, Et al., Engineering ap⁃ plication and development prospect of VSC-HVDC transmis⁃ sion technology[J], Automation of Electric Power Systems, 47, 1, pp. 1-11, (2023)

[9]

Zhikang SHUAI, Dong HE, Zhijie XIONG, Et al., Comparative study of short-circuit fault characteristics for VSC-based DC distribution networks with different distributed generators[J], IEEE Journal of Emerging and Selected Topics in Power Electronics, 7, 1, pp. 528-540, (2019)

[10]

XIN Baoan, GUO Mingqun, WANG Shaowu, Et al., Friendly HVDC transmission technologies for large-scale renewable energy and their engineering practice[J], Automation of Elec⁃ tric Power Systems, 45, 22, pp. 1-8, (2021)

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