基于故障全电流相关性检验的柔性直流配电线路纵联保护

doi:10.19595/j.cnki.1000-6753.tces.190185

摘要
图/表
参考文献
相关文章 (4)

全文: PDF (39497 KB) HTML
输出: BibTeX | EndNote (RIS)

摘要柔性直流配电系统中,直流故障通常导致全网换流器自身闭锁保护速动（2~5ms）,保护需要利用有限、时变的故障信息快速、准确地识别故障区域,跳开相应故障隔离开关快速恢复供电。因此,基于时变的故障暂态信号,研究快速、准确识别故障区域的保护是直流配电系统发展的迫切需求。该文提出一种基于故障全电流相关性检验的柔性直流配电线路纵联保护。该方法以故障发生后线路两侧电流波形形变特征、极性特征的规律变化为基础,通过t检验（假设检验的一种）算法对两侧全电流信号进行相关性检验,即对两侧全电流信号的幅值大小、方向、极性、突变特性进行统一描述,进而构造保护动作判据。所提方法优点在于无需固定频段特征提取,无需特征绝对值及瞬时幅值的比较,因此避免了常规利用暂态信号的保护受过渡电阻、线路分布式电容、噪声的影响。通过物理实验与仿真结果表明所提保护能较好地满足直流配电系统对保护速动性与选择性的需求,具有一定的应用前景。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王聪博
	贾科
	赵其娟
	冯涛
	毕天姝

关键词 ：柔性直流配电系统, 故障电流特征, 相关性检验, t检验算法, 故障判别

Abstract：Because the converter is fast blocking (2~5ms) when DC line fault occurs in flexible DC distribution system, limited time and data with time-varying are available for fault area estimation. Therefore, quick fault detection and isolation of faulty section are desired in DC distribution system, which can accelerate the process of clear fault and decrease the system restoration time. This paper proposed a new pilot protection for flexible-DC distribution line based on correlation test of DC current. Based on the fault current characteristics, the t-test was adopted to calculate the correlation of transient, and then the criterion was constructed. The method uniformly describes the magnitude, direction, polarity and abrupt characteristics of total current signals on both sides, avoiding the influence of transition resistance, distributed capacitance and noise on the protection of transient signals. Hardware test and simulation results show that the proposed protection can identify internal faults with good reliability and high sensitivity, which is feasible for industry application.

Key words： Flexible DC distribution line fault current characteristics correlation test t-test algorithm fault identification

收稿日期: 2019-02-25 出版日期: 2020-04-24

PACS:

TM771

基金资助:国家重点研发计划基金（2018YFB0904104）和国家电网公司科技项目（SGHB0000KXJS1800685）资助

通讯作者: 贾科男,1986年生,教授,博士生导师,研究方向为电力系统保护与控制、新型配电网故障定位与系统自我恢复。E-mail: ke.jia@ncepu.edu.cn

作者简介: 王聪博男,1990年生,博士研究生,研究方向为柔性直流配电系统保护与控制。E-mail: wangcongbo107@163.com

引用本文:

王聪博, 贾科, 赵其娟, 冯涛, 毕天姝. 基于故障全电流相关性检验的柔性直流配电线路纵联保护[J]. 电工技术学报, 2020, 35(8): 1764-1775. Wang Congbo, Jia Ke, Zhao Qijuan, Feng Tao, Bi Tianshu. Pilot Protection for Flexible-DC Distribution Line Based on Correlation Test of DC Current. Transactions of China Electrotechnical Society, 2020, 35(8): 1764-1775.

链接本文:

https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.190185 https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I8/1764

[1] 肖湘宁, 廖坤玉, 唐松浩, 等. 配电网电力电子化的发展和超高次谐波新问题[J]. 电工技术学报, 2018, 33(4): 707-720.
Xiao Xiangning, Liao Kunyu, Tang Songhao, et al.Development of power-electronized distribution grids and the new supraharmonics issues[J]. Transactions of China Electrotechnical Society, 2018, 33(4): 707-720.
[2] Monadi M, Zamani M A, Candela J I, et al.Protection of AC and DC distribution systems embedding distributed energy resources: a com- parative review and analysis[J]. Renewable and Sustainable Energy Reviews, 2015, 51: 1578-1593.
[3] 戴志辉, 葛红波, 严思齐, 等. 柔性直流配电网故障分析[J]. 电工技术学报, 2018, 33(8): 1863-1874.
Dai Zhihui, Ge Hongbo, Yan Siqi, et al.Fault analysis of flxible DC distribution system[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(8): 1863-1874.
[4] 苏见燊, 郭敬东, 金涛. 柔性直流电网中直流故障特性分析及线路故障重启策略[J]. 电工技术学报, 2019, 34(增刊1): 352-359.
Su Jianshen, Guo Jingdong, Jin Tao.DC fault characteristics and line fault recovery strategy in flexible DC power network[J]. Transactions of China Electrotechnical Society, 2019, 34(S1): 352-359.
[5] Zheng Xiaodong, Tai Nengling, Wu Z, et al.Harmonic current protection scheme for voltage source converter-based high-voltage direct current transmission system[C]//Power & Energy Society General Meeting, Denver, CO, 2015, DOI: 10.1109/ PESGM.2015.7285723.
[6] 郭贤珊, 李探, 李高望, 等. 张北柔性直流电网换流阀故障穿越策略与保护定值优化[J]. 电力系统自动化, 2018, 42(24): 196-202.
Guo Xianshan, Li Tan, Li Gaowang, et al.Fault ride-through strategy and protection setting optimi- zation of converter valve for Zhangbei VSC-HVDC grid[J]. Automation of Electric Power Systems, 2018, 42(24): 196-202.
[7] 汤广福. 基于电压源换流器的高压直流输电技[M]. 北京: 中国电力出版社, 2010.
[8] 于洋, 孙学锋, 高鹏, 等. 高压直流输电线路暂态保护分析与展望[J]. 电力系统保护与控制, 2015, 43(22): 127-133.
Yu Yang, Sun Xuefeng, Gao Peng, et al.Analysis and prospect on transient protection for HVDC trans- mission lines[J]. Power System Protection and Control, 2015, 43(22): 127-133.
[9] 张颖, 邰能灵, 徐斌. 高压直流线路纵联行波方向保护[J]. 电力系统自动化, 2012, 36(21): 77-80.
Zhang Ying, Tai Nengling, Xu Bin.Travelling wave based pilot directional protection for HVDC line[J]. Automation of Electric Power Systems, 2012, 36(21): 77-80.
[10] 孔飞, 张保会, 王艳婷. 基于行波波形相关性分析的直流输电线路纵联保护方案[J]. 电力系统自动化, 2014, 38(20): 108-114.
Kong Fei, Zhang Baohui, Wang Yanting.A new pilot protection scheme for HVDC transmission lines based on waveform correlation analysis of traveling wave[J]. Automation of Electric Power Systems, 2014, 38(20): 108-114.
[11] Meghwani A, Srivastava S, Chakrabarti S.A non-unit protection scheme for DC microgrid based on local measurements[J]. IEEE Transactions on Power Delivery, 2017, 32(1): 172-181.
[12] 高淑萍, 索南加乐, 宋国兵. 利用电流突变特性的高压直流输电线路纵联保护新原理[J]. 电力系统自动化, 2011, 35(5): 52-56.
Gao Shuping, Suonan Jiale, Song Guobing.A new pilot protection principle for HVDC transmission lines based on current fault component[J]. Auto- mation of Electric Power Systems, 2011, 35(5): 52-56.
[13] 杨帆. 谈GB/T 30137-2013《电能质量电压暂降与短时中断》的贯彻访中国电力科学研究院教授级高工林海雪[J]. 电气应用, 2015, 34(11): 6-9.
Yang Fan.Discussion on power quality-voltage dips and short interruptions (GB/T 30137-2013)[J]. Electrotechnical Application, 2015, 34(11): 6-9.
[14] 范志华, 苗世洪, 刘子文, 等. 模块化多电平换流器子模块故障特性分析与解耦控制策略[J]. 电工技术学报, 2018, 33(16): 3707-3718.
Fan Zhihua, Miao Shihong, Liu Ziwen, et al.Modular multilevel converter sub-module fault characteristics analysis and decoupling control strategy[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(16): 3707-3718.
[15] 蔡静, 董新洲. 高压直流输电线路故障清除及恢复策略研究综述[J]. 电力系统自动化, 2019, 43(11): 181-190.
Cai Jing, Dong Xinzhou.Overview on research of fault clearing and recovery strategy for HVDC transmission lines[J]. Automation of Electric Power Systems, 2019, 43(11): 181-190.
[16] 丁然, 梅军, 管州, 等. 适用于MMC型直流变压器的直流故障主动限流控制方法[J]. 电力系统自动化, 2018, 42(21): 131-142.
Ding Ran, Meijun, Guan Zhou, et al.Active current limiting control method for DC fault of MMC based DC transformer[J]. Automation of Electric Power Systems, 2018, 42(21): 131-142.
[17] 郝瑞祥, 杨晓峰, 薛尧, 等. 一种具有直流故障限流能力的模块化多电平换流器[J]. 电工技术学报, 2017, 32(6): 172-180.
Hao Ruixiang, Yang Xiaofeng, Xue Yao, et al.A novel modular multilevel converter with DC fault current limiting capability[J]. Transactions of China Electrotechnical Society, 2017, 32(6): 172-180.
[18] 张良圣, 倪永年. t检验法用于评价中药色谱指纹图谱的相似度[J]. 分析科学学报, 2007, 23(5): 511-514.
Zhang Liangsheng, Ni Yongnian.Application of t-test method to similarity analysis of chromato- graphic fingerprint of herbal medicine[J]. Journal of Analytical Science, 2007, 23(5): 511-514.
[19] 申希平, 丁建生, 李娟生, 等. 在SPSS中利用均数和标准差做两独立样本t检验[J]. 现代预防医学, 2007(21): 4066-4067, 4069.
Shen Xiping, Ding Jiansheng, Li Juansheng, et al.2- independent-samples t-test undertaking by the means of mean and standard deviation in SPSS[J]. Modern Preventive Medicine, 2007(21): 4066-4067, 4069.
[20] Carrica D, Benedetti M, Petrocelli R.Random sampling applied to the measurement of a DC signal immersed in noise[J]. IEEE Transactions on Instru- mentation & Measurement, 2001, 50(5): 1319-1323.