基于伴随网络的直流电网短路电流计算方法

doi:10.11930/j.issn.1004-9649.202104070

中国电力 ›› 2021, Vol. 54 ›› Issue (10): 2-10,27.DOI: 10.11930/j.issn.1004-9649.202104070

• 国家“十三五”智能电网重大专项专栏：（八）直流电网故障电流抑制技术专栏 • 上一篇下一篇

基于伴随网络的直流电网短路电流计算方法

王子文, 张英敏, 刘天琪, 陈若尘, 李峰

四川大学电气工程学院，四川成都 610065

收稿日期:2021-04-29 修回日期:2021-08-10 出版日期:2021-10-05 发布日期:2021-10-16
作者简介:王子文(1997-),男,硕士研究生,从事柔性直流输电研究,E-mail:wangzw_scu@163.com;张英敏(1974-),女,通信作者,博士,教授,从事电力系统稳定与控制、直流输电、智能电网研究,E-mail:zhangyingmin@scu.edu.cn;刘天琪(1962-),女,博士,教授,从事高压直流输电、电力系统稳定与控制研究,E-mail:tqliu@scu.edu.cn
基金资助:
国家重点研发计划资助项目(柔性直流电网故障电流抑制的基础理论研究，2018YFB0904600)

A Short-Circuit Current Calculation Method Based on Adjoint Network for DC Grid

WANG Ziwen, ZHANG Yingmin, LIU Tianqi, CHEN Ruochen, LI Feng

College of Electrical Engineering, Sichuan University, Chengdu 610065, China

Received:2021-04-29 Revised:2021-08-10 Online:2021-10-05 Published:2021-10-16
Supported by:
This work is supported by National Key R & D Program of China (Research on the Basic Theory of Fault Current Suppression in Flexible DC Grid, No.2018YFB0904600)

摘要/Abstract

摘要： 直流线路发生短路故障后，子模块电容作为换流器闭锁前短路电流的主要贡献单元，其极快的放电速度，对直流电网的安全稳定运行提出了严峻考验，亟待开展直流电网短路电流计算方法的研究。首先采用梯形积分法对所建直流电网等效模型中的动态元件进行离散化，再通过改进节点法构建网络方程，迭代求得故障支路各时刻的短路电流，进而提出一种基于伴随网络的直流电网短路电流计算方法。在PSCAD/EMTDC软件中搭建四端双极环形直流电网模型进行仿真，根据直流线路发生不同类型故障的仿真结果，在计算精度和计算效率2个方面，将所提计算方法与典型的状态空间法进行比较，分析了2种方法的误差来源，验证了所提算法的有效性。

关键词: 直流电网, 短路电流, 伴随网络, 梯形积分法, 离散

Abstract: When a short-circuit fault occurs in a DC line, the sub-module capacitor is the main contribution unit for the short-circuit current before the blocking of the converter. Its extremely fast discharge speed poses a challenge to the safe and stable operation of DC grid. It is thus urgent to study the calculation method of the short-circuit current in DC grid. Firstly, the trapezoidal integration method is used to discretize the dynamic components in the established DC grid equivalent model. Then, the improved node method is used to construct the network equation, and the short-circuit current of the faulty branch is obtained through iteration. Furthermore, a new method is proposed to calculate the short-circuit current of DC grid based on adjoint network. A four-terminal real bipolar toroidal DC grid model is built in PSCAD/EMTDC software. According to the simulation results of different types of faults in DC lines, the proposed calculation method is compared with the typical state space method in terms of calculation accuracy and calculation efficiency. The error sources of the two methods are analyzed, and the effectiveness of the proposed algorithm is verified.

Key words: DC-grid, short-circuit current, adjoint network, trapezoidal integration method, discrete

王子文, 张英敏, 刘天琪, 陈若尘, 李峰. 基于伴随网络的直流电网短路电流计算方法[J]. 中国电力, 2021, 54(10): 2-10,27.

WANG Ziwen, ZHANG Yingmin, LIU Tianqi, CHEN Ruochen, LI Feng. A Short-Circuit Current Calculation Method Based on Adjoint Network for DC Grid[J]. Electric Power, 2021, 54(10): 2-10,27.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202104070

https://www.electricpower.com.cn/CN/Y2021/V54/I10/2

参考文献

[1] 温家良, 吴锐, 彭畅, 等. 直流电网在中国的应用前景分析[J]. 中国电机工程学报, 2012, 32(13): 7–12, 185
WEN Jialiang, WU Rui, PENG Chang, et al. Analysis of DC grid prospects in China[J]. Proceedings of the CSEE, 2012, 32(13): 7–12, 185
[2] 刘增训, 游沛羽, 周勤勇. 适用高比例新能源系统广域消纳的输电技术研究综述[J]. 电力工程技术, 2020, 39(5): 59–70
LIU Zengxun, YOU Peiyu, ZHOU Qinyong. Transmission technologies adapting to power systems with widely-consumed high-proportion renewable energy[J]. Electric Power Engineering Technology, 2020, 39(5): 59–70
[3] 赵东元, 胡楠, 傅靖, 等. 提升新能源电力系统灵活性的中国实践及发展路径研究[J]. 电力系统保护与控制, 2020, 48(24): 1–8
ZHAO Dongyuan, HU Nan, FU Jing, et al. Research on the practice and road map of enhancing the flexibility of a new generation power system in China[J]. Power System Protection and Control, 2020, 48(24): 1–8
[4] 汤广福, 罗湘, 魏晓光. 多端直流输电与直流电网技术[J]. 中国电机工程学报, 2013, 33(10): 8–17, 24
TANG Guangfu, LUO Xiang, WEI Xiaoguang. Multi-terminal HVDC and DC-grid technology[J]. Proceedings of the CSEE, 2013, 33(10): 8–17, 24
[5] 庄卫金, 王艳, 孙名扬, 等. ±500 kV多端柔性直流输电系统监视功能设计[J]. 电力工程技术, 2017, 36(3): 38–43, 56
ZHUANG Weijin, WANG Yan, SUN Mingyang, et al. Monitoring solutions for a ±500 kV multi-terminal VSC-HVDC transmission system[J]. Electric Power Engineering Technology, 2017, 36(3): 38–43, 56
[6] 徐政, 薛英林, 张哲任. 大容量架空线柔性直流输电关键技术及前景展望[J]. 中国电机工程学报, 2014, 34(29): 5051–5062
XU Zheng, XUE Yinglin, ZHANG Zheren. VSC-HVDC technology suitable for bulk power overhead line transmission[J]. Proceedings of the CSEE, 2014, 34(29): 5051–5062
[7] 吴亚楠, 吕铮, 贺之渊, 等. 基于架空线的直流电网保护方案研究[J]. 中国电机工程学报, 2016, 36(14): 3726–3734
WU Yanan, LÜ Zheng, HE Zhiyuan, et al. Study on the protection strategies of HVDC grid for overhead line application[J]. Proceedings of the CSEE, 2016, 36(14): 3726–3734
[8] 刘振亚. 特高压交直流电网[M]. 北京: 中国电力出版社, 2013.
[9] 刘栋, 唐绍普, 胡祥楠, 等. 电力系统基础仿真算法对比分析研究[J]. 全球能源互联网, 2018, 1(2): 137–143
LIU Dong, TANG Shaopu, HU Xiangnan, et al. The comparison and study of fundamental algorithms in power system simulation[J]. Journal of Global Energy Interconnection, 2018, 1(2): 137–143
[10] 贺之渊, 刘栋, 庞辉. 柔性直流与直流电网仿真技术研究[J]. 电网技术, 2018, 42(1): 1–12
HE Zhiyuan, LIU Dong, PANG Hui. Research of simulation technologies of VSC-HVDC and DC grids[J]. Power System Technology, 2018, 42(1): 1–12
[11] DUFOUR C, MAHSEREDJIAN J, BÉLANGER J, et al. An advanced real-time electro-magnetic simulator for power systems with a simultaneous state-space nodal solver[C]//2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA). Sao Paulo, Brazil. IEEE, 2010: 349–358.
[12] DUFOUR C, MAHSEREDJIAN J, BÉLANGER J. A combined state-space nodal method for the simulation of power system transients[J]. IEEE Transactions on Power Delivery, 2011, 26(2): 928–935.
[13] DUFOUR C, TREMBLAY O. Iterative algorithms of surge arrester for real-time simulators[C]//2014 Power Systems Computation Conference. Wroclaw, Poland. IEEE, 2014: 1–4.
[14] 段国朝, 王跃, 尹太元, 等. 模块化多电平变流器直流短路故障电流计算[J]. 电网技术, 2018, 42(7): 2145–2152
DUAN Guozhao, WANG Yue, YIN Taiyuan, et al. DC short circuit current calculation for modular multilevel converter[J]. Power System Technology, 2018, 42(7): 2145–2152
[15] 汤兰西, 董新洲. MMC直流输电网线路短路故障电流的近似计算方法[J]. 中国电机工程学报, 2019, 39(2): 490–498, 646
TANG Lanxi, DONG Xinzhou. An approximate method for the calculation of transmission line fault current in MMC-HVDC grid[J]. Proceedings of the CSEE, 2019, 39(2): 490–498, 646
[16] 李俊松, 张英敏, 曾琦, 等. MMC-MTDC系统单极接地故障电流计算方法[J]. 电网技术, 2019, 43(2): 546–555
LI Junsong, ZHANG Yingmin, ZENG Qi, et al. Pole-to-ground fault current calculation method for MMC-MTDC systems[J]. Power System Technology, 2019, 43(2): 546–555
[17] 陈宁, 齐磊, 崔翔, 等. 柔性直流电网单极接地短路电流计算方法[J]. 电力建设, 2019, 40(4): 119–127
CHEN Ning, QI Lei, CUI Xiang, et al. Calculation method for line-to-ground short-circuit currents of VSC-HVDC grid[J]. Electric Power Construction, 2019, 40(4): 119–127
[18] 彭宇锋, 张英敏, 李俊松, 等. 考虑线路电容的MMC-HVDC系统直流接地故障电流计算方法[J]. 电力系统保护与控制, 2020, 48(23): 57–63
PENG Yufeng, ZHANG Yingmin, LI Junsong, et al. Ground fault current calculation method for an MMC-HVDC system considering line capacitance[J]. Power System Protection and Control, 2020, 48(23): 57–63
[19] LI C Y, ZHAO C Y, XU J Z, et al. A pole-to-pole short-circuit fault current calculation method for DC grids[J]. IEEE Transactions on Power Systems, 2017, 32(6): 4943–4953.
[20] 赵翠宇, 齐磊, 陈宁, 等. ±500 kV张北柔性直流电网单极接地故障健全极母线过电压产生机理[J]. 电网技术, 2019, 43(2): 530–536
ZHAO Cuiyu, QI Lei, CHEN Ning, et al. Research on producing mechanism of healthy pole bus overvoltage for monopolar grounding fault in ±500kV Zhangbei flexible DC power grid[J]. Power System Technology, 2019, 43(2): 530–536
[21] 裴翔羽, 汤广福, 张盛梅, 等. 双极柔性直流电网短路电流暂态特性分析[J]. 全球能源互联网, 2018, 1(4): 403–412
PEI Xiangyu, TANG Guangfu, ZHANG Shengmei, et al. Analysis on transient characteristics of short-circuit current for bipolar VSC-based DC grid[J]. Journal of Global Energy Interconnection, 2018, 1(4): 403–412
[22] 冯智博, 辛业春, 李国庆. 基于改进时域法的多端MMC-HVDC故障电流计算[J]. 现代电力, 2020, 37(6): 575–584
FENG Zhibo, XIN Yechun, LI Guoqing. An improved time domain method based fault current calculation for multi-terminal MMC-HVDC transmission system[J]. Modern Electric Power, 2020, 37(6): 575–584
[23] 辛业春, 王拓, 李国庆, 等. 基于离散模型的柔性直流电网短路电流计算方法[J]. 电力系统及其自动化学报, 2021, 33(5): 30–37
XIN Yechun, WANG Tuo, LI Guoqing, et al. Short-circuit current calculation method for VSC-HVDC grid based on discrete model[J]. Proceedings of the CSU-EPSA, 2021, 33(5): 30–37

基于伴随网络的直流电网短路电流计算方法

A Short-Circuit Current Calculation Method Based on Adjoint Network for DC Grid

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

[1]	吴云锐, 张建坡, 田新成, 应恺锋, 陈忠. 计及频率适应和快速稳定特性的多端直流电网改进协调控制策略[J]. 中国电力, 2025, 58(3): 31-42.
[2]	刘航, 申皓, 杨勇, 纪陵, 余洋. 基于高阶马尔可夫链的纯电重卡集群负荷预测[J]. 中国电力, 2024, 57(5): 61-69.
[3]	董淑文, 刘宝柱, 胡俊杰. 计及线路优化投切限流的含风电电网扩展规划方法[J]. 中国电力, 2023, 56(8): 117-125,142.
[4]	李惠玲. 新型电力系统背景下西部送端直流电网及系统运行特性[J]. 中国电力, 2023, 56(8): 166-174.
[5]	李惠玲, 王曦, 高剑, 宋云亭. 新型电力系统背景下西部送端直流电网方案构建[J]. 中国电力, 2023, 56(5): 12-21.
[6]	王晶, 袁懿, 邵尹池, 张晋奇, 丁然, 巩彦江. 考虑资源储备度的主动配电网多目标集群划分与电压控制方法[J]. 中国电力, 2023, 56(12): 69-79.
[7]	马海飞, 滕伟, 彭迪康, 柳亦兵, 靳涛. 基于DRS与改进Autogram的风电齿轮箱复合故障特征提取[J]. 中国电力, 2023, 56(10): 71-79.
[8]	熊玮, 张越, 窦建中, 江保锋, 单连飞. 离散时域框架下的电网状态空间构建及应用[J]. 中国电力, 2022, 55(6): 111-117.
[9]	李东升, 郝亮亮, 郭智琳, 曹虹, 王兴国. 调相机接入后距离保护Ⅱ段的定值优化策略[J]. 中国电力, 2022, 55(5): 76-83.
[10]	符金伟, 史常凯, 尹惠, 关石磊, 王安琪, 王越. 基于综合特征矩阵的配电网故障判别方法[J]. 中国电力, 2021, 54(11): 125-132.
[11]	袁敏, 茆美琴, 程德健, 张榴晨. 主电路参数对MMC-HVDC电网直流短路故障电流综合影响分析[J]. 中国电力, 2021, 54(10): 11-19.
[12]	吴嘉玲, 卢铁兵. 柔性直流电网结构对单极接地故障过电压的影响[J]. 中国电力, 2021, 54(10): 20-27.
[13]	夏仕伟, 高晨祥, 孙昱昊, 冯谟可, 赵成勇, 许建中, 程亭婷, 谷怀广. 含多种限流设备的柔性直流电网RT-LAB实时仿真建模[J]. 中国电力, 2021, 54(10): 28-37.
[14]	全月, 王志远, 李彬彬, 徐殿国. 集成直流断路器功能的高压大容量DC/DC变换器[J]. 中国电力, 2021, 54(10): 46-54.
[15]	傅守强, 张立斌, 李红建, 陈翔宇, 高杨, 陈蕾. 高压大容量柔性直流电网换流站阀厅空气净距计算及紧凑化布局设计[J]. 中国电力, 2021, 54(1): 10-18.

模态框（Modal）标题

基于伴随网络的直流电网短路电流计算方法

A Short-Circuit Current Calculation Method Based on Adjoint Network for DC Grid

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics