计及多种分布式能源的多端直流配电网故障电流计算方法

贾东梨; 任昭颖; 刘科研; 叶学顺; 李跃涛; 徐利梅

doi:10.11930/j.issn.1004-9649.202508038

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计及多种分布式能源的多端直流配电网故障电流计算方法

能源电力数据要素与人工智能应用 | 更新时间：2026-02-03

- 计及多种分布式能源的多端直流配电网故障电流计算方法
- Fault current calculation method for multi-terminal DC distribution networks considering multiple distributed generation
- 中国电力 2026年59卷第1期页码：84-96
- 作者机构：
  
  1. 中国电力科学研究院有限公司,北京,100192
  2. 西南民族大学电气工程学院,四川,成都,610225
- 作者简介：
- 基金信息：
  
  四川省自然科学基金资助项目（2022NSFSC1913）;国家电网公司科技项目（5108-202218280A-2-370-XG）。
- DOI：10.11930/j.issn.1004-9649.202508038
  中图分类号：
- 网络出版：2026-01-13，
  
  纸质出版：2026-01-13
- 稿件说明：
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贾东梨, 任昭颖, 刘科研, 叶学顺, 李跃涛, 徐利梅. 计及多种分布式能源的多端直流配电网故障电流计算方法[J]. 中国电力, 2026, 59(1): 84-96.

贾东梨, 任昭颖, 刘科研, et al. Fault current calculation method for multi-terminal DC distribution networks considering multiple distributed generation[J]. 2026, 59(1): 84-96.
贾东梨, 任昭颖, 刘科研, 叶学顺, 李跃涛, 徐利梅. 计及多种分布式能源的多端直流配电网故障电流计算方法[J]. 中国电力, 2026, 59(1): 84-96. DOI： 10.11930/j.issn.1004-9649.202508038.

贾东梨, 任昭颖, 刘科研, et al. Fault current calculation method for multi-terminal DC distribution networks considering multiple distributed generation[J]. 2026, 59(1): 84-96. DOI： 10.11930/j.issn.1004-9649.202508038.

摘要

直流配电网短路故障电流将在极短时间内上升至正常运行电流的数倍，对系统保护与安全运行构成严峻挑战。直流配电网中含有多种分布式能源，其并网变流器多样、耦合关系复杂，导致故障特性分析与故障电流计算困难，不利于保护策略设计。为此，提出含多种分布式能源的直流配电网故障电流计算模型。首先，建立电压源型变流器（voltage source converter，VSC）的故障等效回路，并分析分布式光伏Boost变换器、分布式风电机侧变流器（modular multilevel converter，MSC）、储能双有源桥变流器（dual active bridge，DAB）与VSC耦合运行下故障响应特性，建立多场景故障等效回路。其次，从故障电流多阶段暂态响应过程出发，建立故障前初始稳态阶段、直流母线放电阶段、二极管续流阶段与故障后稳态阶段的故障电流计算模型。然后，基于所建多阶段故障电流计算模型，分析影响故障峰值电流的关键因素。最后，以含多分布式能源的多端直流配电网为例，将理论计算结果与Matlab/Simulink仿真结果对比，验证所提模型的准确性。

Abstract

In DC distribution networks

short-circuit faults can cause the current to rise to several times the normal operating level in an extremely short period

posing severe challenges to system protection and safe operation. The presence of multiple distributed generators (DGs) in DC distribution networks and the diversity of their grid-connected converters as well as the complex coupling relationships make it difficult to analyze fault characteristics and accurately calculate fault currents

which is unfavorable to the design of protection strategies. To address this issue

this paper proposes a fault current calculation model for DC distribution networks with multiple DGs. First

a fault equivalent circuit of the voltage source converter (VSC) is established

and the fault response characteristics of PV Boost converters

distributed wind power machine-side converters (MSC)

energy storage dual active bridge (DAB) converters and VSCs are analyzed to construct multi-scenario fault equivalent circuits. Second

proceeding from the multi-stage transient response process of fault current

a fault current calculation model is built

covering the initial steady-state stage before fault

DC bus discharge stage

diode freewheeling stage and steady-state stage after fault. Then

based on the established multi-stage fault current calculation model

the key factors affecting the peak fault current are analyzed. Finally

taking a multi-terminal DC distribution network with multiple DGs as an example

the theoretical calculation results are compared with the Matlab/Simulink simulation results to verify the accuracy of the proposed model.

关键词

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references

1刘科研, 任昭颖, 王瑶. 基于控保协同的多端柔性直流配网故障测距方法[J]. 高电压技术, 2023, 49 (8): 3458- 3466.

LIU Keyan, REN Zhaoying, WANG Yao. Fault location method for multi-terminal flexible DC distribution network based on control and protection coordination[J]. High Voltage Engineering, 2023, 49 (8): 3458- 3466.

2李晓庆, 张培超, 祝炜昊, 等. 基于灵敏度的光储直流配电网电压/网损自适应优化协调控制[J]. 电力建设, 2024, 45 (7): 88- 99.

LI Xiaoqing, ZHANG Peichao, ZHU Weihao, et al. Sensitivity-based adaptive voltage/network loss-coordinated optimal control in photovoltaic-storage DC distribution systems[J]. Electric Power Construction, 2024, 45 (7): 88- 99.

3汤广福, 庞辉, 贺之渊. 先进交直流输电技术在中国的发展与应用[J]. 中国电机工程学报, 2016, 36 (7): 1760- 1771.

TANG Guangfu, PANG Hui, HE Zhiyuan. R & D and application of advanced power transmission technology in China[J]. Proceedings of the CSEE, 2016, 36 (7): 1760- 1771.

4MONADI M, AMIN ZAMANI M, IGNACIO CANDELA J, et al. Protection of AC and DC distribution systems Embedding distributed energy resources: a comparative review and analysis[J]. Renewable and Sustainable Energy Reviews, 2015, 51, 1578- 1593.

5KOU G F, CHEN L, VANSANT P, et al. Fault characteristics of distributed solar generation[J]. IEEE Transactions on Power Delivery, 2020, 35 (2): 1062- 1064.

6FENG X Y, QI L, PAN J P. A novel fault location method and algorithm for DC distribution protection[J]. IEEE Transactions on Industry Applications, 2017, 53 (3): 1834- 1840.

7SHUAI Z K, HE D, XIONG Z J, 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, 2019, 7 (1): 528- 540.

8LI Y J, LI J P, XIONG L S, et al. DC fault detection in meshed MTdc systems based on transient average value of current[J]. IEEE Transactions on Industrial Electronics, 2020, 67 (3): 1932- 1943.

9YUAN S, YAN J, YU Y J, et al. Calculation method of short-circuit fault current in flexible DC grid[J]. Energy Reports, 2022, 8, 461- 468.

10YANG J, FLETCHER J E, O’REILLY J. Short-circuit and ground fault analyses and location in VSC-based DC network cables[J]. IEEE Transactions on Industrial Electronics, 2012, 59 (10): 3827- 3837.

11SUN P X, JIAO Z B, GU H W. Calculation of short-circuit current in DC distribution system based on MMC linearization[J]. Frontiers in Energy Research, 2021, 9, 634232.

12何东, 徐明章, 兰征, 等. 含分布式光伏的中压直流配电网接地故障暂态特性分析[J]. 电力自动化设备, 2023, 43 (11): 43- 50.

HE Dong, XU Mingzhang, LAN Zheng, et al. Analysis of grounding fault transient characteristics of medium-voltage DC distribution network with distributed photovoltaic[J]. Electric Power Automation Equipment, 2023, 43 (11): 43- 50.

13DAI Z H, ZHANG C, CHEN X, et al. Fault analysis of multi-terminal flexible DC distribution system with RES[C]//2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). Kota Kinabalu, Malaysia. IEEE, 2018: 589-594.

14SESHAGIRI RAO V, SUNDARAMOORTHY K. Performance analysis of voltage multiplier coupled cascaded boost converter with solar PV integration for DC microgrid application[J]. IEEE Transactions on Industry Applications, 2023, 59 (1): 1013- 1023.

15姚骏, 廖勇, 瞿兴鸿, 等. 直驱永磁同步风力发电机的最佳风能跟踪控制[J]. 电网技术, 2008, 32 (10): 11- 15, 27.

YAO Jun, LIAO Yong, QU Xinghong, et al. Optimal wind-energy tracking control of direct-driven permanent magnet synchronous generators for wind turbines[J]. Power System Technology, 2008, 32 (10): 11- 15, 27.

16沙兆义, 王聪博, 詹荣荣, 等. 基于故障全电流多阶突变的换流器并网线路纵联保护[J]. 中国电力, 2024, 57 (2): 62- 71.

SHA Zhaoyi, WANG Congbo, ZHAN Rongrong, et al. Pilot protection for converter-interconnected lines based on multi-stage mutation of fault current[J]. Electric Power, 2024, 57 (2): 62- 71.

17刘昕宇, 王国腾, 徐政, 等. 含MMC的交直流输电系统短路电流统一求解方法[J]. 电力自动化设备, 2022, 42 (4): 184- 189.

LIU Xinyu, WANG Guoteng, XU Zheng, et al. Unified solution method of short circuit current for AC/DC transmission system with MMC[J]. Electric Power Automation Equipment, 2022, 42 (4): 184- 189.

18胡枭, 尚策, 程浩忠, 等. 综合能源系统能流计算方法述评与展望[J]. 电力系统自动化, 2020, 44 (18): 179- 191.

HU Xiao, SHANG Ce, CHENG Haozhong, et al. Review and prospect of calculation method for energy flow in integrated energy system[J]. Automation of Electric Power Systems, 2020, 44 (18): 179- 191.

19景巍巍, 王强, 程好, 等. 电热综合能源系统稳态与区间潮流计算快速解耦新方法[J]. 中国电力, 2024, 57 (7): 203- 213.

JING Weiwei, WANG Qiang, CHENG Hao, et al. New rapid decoupling methods for calculating steady-state and interval power flow of integrated electricity-heat energy systems[J]. Electric Power, 2024, 57 (7): 203- 213.

20周登钰, 张新燕, 赵理飞, 等. 含大规模风光功率汇集的多端柔性直流系统分析[J]. 太阳能学报, 2020, 41 (2): 93- 100.

ZHOU Dengyu, ZHANG Xinyan, ZHAO Lifei, et al. Analysis of multi-terminal flexible DC system with large scale power collection[J]. Acta Energiae Solaris Sinica, 2020, 41 (2): 93- 100.

21李佳蔚, 张冠宇. 大规模分布式新能源接入对省级电网稳定性影响[J]. 中国电力, 2024, 57 (6): 174- 180.

LI Jiawei, ZHANG Guanyu. Impact of large scale distributed new energy access on provincial power grid stability[J]. Electric Power, 2024, 57 (6): 174- 180.

22黄莉, 梁云, 黄辉, 等. 基于代理模型的电力电缆温度场快速计算方法及其应用[J]. 中国电力, 2024, 57 (5): 178- 187.

HUANG Li, LIANG Yun, HUANG Hui, et al. Surrogate model-based fast calculation of power cable temperature field: method and application[J]. Electric Power, 2024, 57 (5): 178- 187.

23韩璐, 尹纯亚, 戴晨, 等. 高比例新能源送端系统暂态电压运行风险分析[J]. 电力系统保护与控制, 2024, 52 (1): 23- 34.

HAN Lu, YIN Chunya, DAI Chen, et al. Transient voltage operational risk of a high-proportion new energy sending system[J]. Power System Protection and Control, 2024, 52 (1): 23- 34.

24罗美玲, 马英, 黄伟兵, 等. 计及电压幅值检测延时及相位跳变的IIDG故障电流解析计算[J]. 中国电力, 2024, 57 (2): 72- 81.

LUO Meiling, MA Ying, HUANG Weibing, et al. IIDG fault current analysis and calculation considering voltage amplitude detection delay and phase jump[J]. Electric Power, 2024, 57 (2): 72- 81.

25郑黎明, 贾科, 毕天姝, 等. 海上风电接入柔直系统交流侧故障特征及对保护的影响分析[J]. 电力系统保护与控制, 2021, 49 (20): 20- 32.

ZHENG Liming, JIA Ke, BI Tianshu, et al. AC-side fault analysis of a VSC-HVDC transmission system connected to offshore wind farms and the impact on protection[J]. Power System Protection and Control, 2021, 49 (20): 20- 32.

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