[1]李景丽,任俊跃,袁 豪,等.基于小波分析的配电网电弧接地故障选线方法[J].郑州大学学报(工学版),2023,44(05):69-76.[doi:10.13705/j.issn.1671-6833.2023.05.011]
　LI Jingli,REN Junyue,YUAN Hao,et al.Research on Arc Grounding Fault Selection Method of Distribution Network Based on Wavelet Analysis[J].Journal of Zhengzhou University (Engineering Science),2023,44(05):69-76.[doi:10.13705/j.issn.1671-6833.2023.05.011]
点击复制

基于小波分析的配电网电弧接地故障选线方法()
分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
44
期数:
2023年05期
页码:
69-76
栏目:
出版日期:
2023-08-20

文章信息/Info

Title:
Research on Arc Grounding Fault Selection Method of Distribution Network Based on Wavelet Analysis
作者:
李景丽1 ;  任俊跃1 ;  袁 豪1 ;  王子鉴1 ;  雷 宏1 ;  赵子敬2
1. 郑州大学 电气与信息工程学院,河南 郑州 450001;2. 国网济源供电公司,河南 济源 459000
Author(s):
LI Jingli ;  REN Junyue;  YUAN Hao;  WANG Zijian;  LEI Hong;  ZHAO Zijing
关键词:
谐振接地系统;  电弧接地故障;  小波分析;  时频域分解;  故障选线
Keywords:
resonant grounding system;  arc grounding fault;  wavelet analysis;  time-frequency domain decomposition;  fault routing
分类号:
TM862；TM74
DOI:
10.13705/j.issn.1671-6833.2023.05.011
文献标志码:
A
摘要:
鉴于城市中低压配电网电容电流急剧上升,单相接地故障电弧难以自熄,易产生电弧接地过电压及扩大 事故,探究谐振接地系统( NES) 电弧 接 地 故 障 的 可 靠 选 线 方 法 是 保 障 配 网 稳 定 安 全 运 行 的 基 础。 首 先,建 立 NES 发生电弧接地故障的等值电路,分析故障、健全线路之间零序电流存在的差异。 其次,通过引入动态弧长参 数改进 Schwarz 电弧模型,并采用 MATLAB / Simulink 搭建改进 Schwarz 电弧仿真模型,在此基础上搭建某城市中 压配电网电容电流超标场景下的纯电缆线路系统电弧接地故障模型。 再次,设置典型故障条件模拟任意线路的 电弧接地故障,提取各线路零序电流进行 coif 小波分解,提出当出线发生电弧接地故障时,故障线路与健全线路 非工频零序电流模极大值的极性相反;当母线发生电弧接地故障时,提出所有出线非工频零序电流模极大值的 极性相同的电弧接地故障选线判据。 最后,设置典型的故障条件验证了该方法对 NES 电弧接地故障选线的有效 性。 结果表明:在不同的过渡电阻、故障点距离、故障时刻相位角等典型故障工况下,所提方法均能正确选择出 电弧接地故障线路。
Abstract:
Chinese urban low-voltage distribution network capacitance current rose sharply, single-phase ground fault arc was difficult to self-extinguish and easy to produce arc light ground overvoltage and lead to accidents. The resonant grounding system (NES) arc ground fault reliable line selection method to ensure the stable and safe operation of the distribution network basis was explored. The equivalent circuit of arc ground fault in NES was first established, and the difference between the zero-sequence current between the fault and the sound line was analyzed. Secondly, the Schwarz arc model was improved by introducing dynamic arc length parameters, and the Schwarzarc simulation model was improved by using MATLAB / Simulink, and on this basis, the arc-optic grounding fault model of the pure cable line system in the scenario of exceeding the capacitance current of a medium-voltage distribution network in a city was constructed. Then, the typical fault conditions were set to simulate the arc grounding fault of any line, and the zero sequence current of each line was extracted for coif wavelet decomposition, and it was proposed that when the arc grounding fault occurred in the outlet line, the polarity of the fault line and the nonpower frequency zero sequence current mode maximum of the sound line was opposite. When the arc ground fault occurred on the busbar, the polarity of the non-power frequency zero sequence current mode maximum of all out lines was the same as the arc ground fault selection criterion. Finally, the typical fault conditions were set to verify the effectiveness of the method for selecting wires for NES arc ground faults. The results showed that in different typical fault conditions such as transition resistance, fault point distance, and phase angle at fault time, this method could correctly select the arc light ground fault line.

参考文献/References:

[1] WANG Z X, ZHANG H J, WANG H Y, et al. Analysis of modeling and fault line selection method for Singlephase Intermittent fault of distribution network[J]. Journal of Physics: Conference Series, 2022, 2355(1): 012047. 

[2] DENG F, ZU Y R, MAO Y, et al. A method for distribution network line selection and fault location based on a hierarchical fault monitoring and control system[ J] . International Journal of Electrical Power & Energy Systems, 2020, 123: 106061.
 [3] 吕高. 基于零序电流比幅法的故障选线法[ J] . 中北 大学学报(自然科学版) , 2014, 35(4) : 473-478. 
LYU G. Method of fault line selection based on zero-sequence current comparison of amplitude [ J] . Journal of North University of China ( Natural Science Edition ) , 2014, 35(4) : 473-478.
 [4] 郭威. 小电流接地系统五次谐波选线法研究[ D] . 西 安: 西安科技大学,2012. 
GUO W. Study on fifth harmonic line selection method for small current grounding system[ D] . Xi′an: Xi′an University of Science and Technology,2012. 
[5] 袁佳歆, 李响, 张哲维. 基于注入信号的有源配电网 单相接地故障选线方法[ J] . 电测与仪表, 2020, 57 (5) :44-49. 
YUAN J X, LI X, ZHANG Z W. Research on singlephase grounding fault selection technology for active distribution network based on injected signal[ J] . Electrical Measurement & Instrumentation, 2020, 57(5) :44-49. 
[6] 方毅, 薛永端, 宋华茂, 等. 谐振接地系统高阻接地 故障暂态能量分析与选线[ J] . 中国电机工程学报, 2018, 38(19) : 5636-5645. 
FANG Y, XUE Y D, SONG H M, et al. Transient energy analysis and line selection of high resistance grounding fault in resonant grounding system[ J] . Proceedings of the CSEE, 2018, 38(19) : 5636-5645.
 [7] 康忠健, 李丹丹, 刘晓林. 应用非工频暂态分量的配 电网故障选线方法[ J] . 电力自动化设备, 2011, 31 (4) :1-6. 
KANG Z J, LI D D, LIU X L. Faulty line selection with non-power frequency transient components of distribution network [ J ] . Electric Power Automation Equipment, 2011, 31(4) :1-6. 
[8] 殷培峰, 刘石红. 基于谐波与首半波结合的单相接地 选线分析与研究[ J] . 自动化与仪器仪表, 2013( 4) : 19-21, 225. 
YIN P F, LIU S H. Analysis and research on single- phase grounding line selection based on harmonic and first half wave[ J] . Automation & Instrumentation, 2013(4) : 19-21, 225.
 [9] 金涛, 褚福亮. 基于暂态非工频零序电流的含 DG 新 型配电网的接地选线方法[ J] . 电工技术学报, 2015, 30(17) :96-105. JIN T, CHU F L. A fault line-selection method in new distribution network with DG based on transient non-power frequency zero sequence current [ J] . Transactions of China Electrotechnical Society, 2015, 30(17) :96-105. 
[10] 于永进, 臧宝花. 基于小波变换的小电流接地系统故 障选线方法[ J] . 煤炭工程, 2011, 43(1) : 48-50. 
YU Y J, ZANG B H. Fault wire line selection method of small current grounding system base on wavelet conversion [ J] . Coal Engineering, 2011, 43(1) : 48-50. 
[11] 赵新红, 车伟. 基于小波变换的小电流接地系统电弧 故障选线[J]. 电力科学与工程, 2003, 19(4): 22-25. ZHAO X H, CHE W. Arc-grounding fault selection for small current neutral grounding systems based on wavelet analysis[ J] . Power Science and Engineering, 2003, 19 (4) : 22-25. 
[12] 赵铁军, 孟菁, 宋岳奇, 等. 组串式光伏系统直流串 联电弧故障检测与保护策略[ J] . 电力系统保护与控 制, 2020, 48(20) : 74-82. 
ZHAO T J, MENG J, SONG Y Q, et al. Series arc detection and protection on the DC side of string-type PVs [ J] . Power System Protection and Control, 2020, 48 (20) : 74-82. 
[13] 杨明波, 龙毅, 樊三军, 等. 基于组合 Mayr 和 Cassie 电弧模型的弧光接地故障仿真及分析[ J] . 电测与仪 表, 2019, 56(10) :8-13. 
YANG M B, LONG Y, FAN S J, et al. Simulation and analysis of arc grounding fault based on combined Mayr and Cassie arc models[ J] . Electrical Measurement & Instrumentation, 2019, 56(10) :8-13. 
[14] 马祖涛, 李淑蓉. 小电流接地故障电弧建模分析[ J] . 电力系统及其自动化学报, 2021, 33(9) :103-108. 
MA Z T, LI S R. Modeling analysis of arc grounding fault in non-solidly earthed system [ J ] . Proceedings of the CSU-EPSA, 2021, 33(9) :103-108. 
[15] 刘艳丽, 郭凤仪, 李磊, 等. 一种串联型故障电弧数学 模型[J]. 电工技术学报, 2019, 34(14):2901-2912. 
LIU Y L, GUO F Y, LI L, et al. A kind of series fault arc mathematical model[ J] . Transactions of China Electrotechnical Society, 2019, 34(14) :2901-2912. 
[16] 蔺华, 王子龙, 郭振华, 等. 考虑弧长动态变化的配 电网电弧接地故障建模及辨识[ J] . 电力系统保护与 控制, 2022, 50(7) :31-39. 
LIN H, WANG Z L, GUO Z H, et al. Modeling and identification of a distribution network arc grounding fault considering arc length dynamic variation[ J] . Power System Protection and Control, 2022, 50(7) :31-39.
 [17] 陈奎, 唐轶. 小电流接地系统电弧接地选线方法的研 究[ J] . 继电器, 2005, 33(16) :5-9. 
CHEN K, TANG Y. Analysis of detecting fault line of arcing grounded fault in isolated neutral system[ J] . Relay, 2005, 33(16) :5-9. 
[18] 陈博博, 屈卫锋, 杨宏宇, 等. 小电流接地系统单相 接地综合电弧模型与选线方法的研究[ J] . 电力系统 保护与控制, 2016, 44(16) :1-7. 
CHEN B B, QU W F, YANG H Y, et al. Research on single phase grounding arc model and line selection for neutral ineffectively grounding system[ J] . Power System Protection and Control, 2016, 44(16) :1-7.

更新日期/Last Update: 2023-09-04