[1]郭慧文,李陇奇,宋文晋,等.基于煤矿供电系统接地故障的中电阻选线算法研究[J].工业仪表与自动化装置,2022,(01):123-126.[doi:10.19950/j.cnki.cn61-1121/th.2022.01.026]
GUO Huiwen,LI Loqey,SONG Wenjin,et al.Research on the algorithm of middle resistance line selection based on ground fault of coal mine power supply system[J].Industrial Instrumentation & Automation,2022,(01):123-126.[doi:10.19950/j.cnki.cn61-1121/th.2022.01.026]
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基于煤矿供电系统接地故障的中电阻选线算法研究
GUO Huiwen,LI Loqey,SONG Wenjin,et al.Research on the algorithm of middle resistance line selection based on ground fault of coal mine power supply system[J].Industrial Instrumentation & Automation,2022,(01):123-126.[doi:10.19950/j.cnki.cn61-1121/th.2022.01.026]
《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]
- 卷:
- 期数:
- 2022年01期
- 页码:
- 123-126
- 栏目:
- 出版日期:
- 2022-02-15
文章信息/Info
- Title:
- Research on the algorithm of middle resistance line selection based on ground fault of coal mine power supply system
- 文章编号:
- 1000-0682（2022）01-0000-00
- Author(s):
- GUO Huiwen1; LI Loqey2; SONG Wenjin1; ZHANG Pengbin1; MU Jianhua1; GUO Qin2
- （1. Jinneng Holding Coal Industry Group Electric Industry Datong Co., Ltd., Shanxi Datong 037003,China；2. Xi’an Xirui Control Technology Co., Ltd., Shaanxi Xi’an 710018 ,China）
- 分类号:
- TM58
- 文献标志码:
- A
- 摘要:
- 我国煤矿配电网多为中性点非有效接地系统，且分支较多，负荷多变，井下环境极为恶劣，由于受到砸压、受潮等多方面的影响，极易导致电缆线路绝缘层老化、绝缘电阻下降等问题，从而诱发井下接地故障。如果接地故障没有得到及时有效的处理，极有可能进一步发展为相间短路，甚至引起瓦斯爆炸等严重的安全事故，严重威胁井下工作人员的安全。为了能及时切除接地故障，该文提出了一种中性点并联中电阻的小电流接地选线算法，该算法通过分析中电阻投入前后线路零序电流阻性分量的变化量来定位故障线路，不受消弧线圈和高阻接地的影响，选线准确率高，能够有效防止电网事故进一步恶化，保障煤矿安全稳定的生产运行。目前，使用该算法开发的装置已经在晋能煤矿变电站进行了试点应用，并取得了良好的效果。
- Abstract:
- China’s coal mine distribution network is mostly neutral point non effective grounding system, with many branches, variable load and extremely bad underground environment. Due to the impact of smashing pressure and moisture, it is very easy to lead to the aging of cable insulation layer and the decline of insulation resistance, so as to induce underground grounding fault. If the grounding fault is not handled timely and effectively, it is very likely to further develop into phase to phase short circuit, and even cause serious safety accidents such as gas explosion, which seriously threatens the safety of underground workers. In order to remove the grounding fault in time, this paper proposes a small current grounding line selection algorithm with neutral parallel medium resistance. The algorithm locates the fault line by analyzing the change of the resistive component of the line zero sequence current before and after the medium resistance is put into operation. It is not affected by arc suppression coil and high resistance grounding, has high line selection accuracy, and can effectively prevent the further deterioration of power grid accidents, Ensure the safe and stable production and operation of coal mines. At present, the device developed by using the algorithm has been applied in Datong coal mine substation, and achieved good results.
参考文献/References:
[1]王俊杰，江智军，周江源.中电阻法小电流选线的测试可行性分析[J].实验室研究与探索, 2016, 35(8):135-137.[2]郭丽伟，薛永利，徐丙垠，等.中性点接地方式对供电可靠性的影响分析[J].电网技术, 2015, 39(08):2340-2345.[3]苏继峰.配电网中性点接地方式研究[J].电力系统保护与控制, 2013, 41(08):141-148.[4]薛永端，李娟，徐丙垠.中性点经消弧线圈接地系统小电流接地故障暂态等值电路及暂态分析[J].中国电机工程学报, 2015, 35(22):5703-5714.[5]李勇.采用消弧线圈并电阻的配电网新型接地方式故障保护研究[D]．株洲:湖南工业大学，2016.[6]周祥，余红云，赵恩龙.消弧线圈并小电阻接地方式应用分析研究[J].电工技术, 2020, 40(10):64-65.[7]盛晔，朱玛，胡贤德，等.配电网中性点经消弧线圈加并联选线电阻接地方式的运行安全可靠性探讨[J].能源工程, 2011, 30(5):18-22.[8]刘荣杰.小庄矿供电系统防越级跳闸技术的应用研究[D]．西安：西安科技大学，2019．[9]石峥，李永丽，宋金钊，等.基于总线的煤矿企业电网接地故障选线系统设计[J].电力系统及其自动化学报, 2018, 30(05):21-27.[10]高增伟.中性点经消弧线圈接地在煤矿中压供电系统上的应用[J].机电工程技术, 2019, 48(08):253-254.[11]杜 平,岳 晨,寇腾腾.压缩传感法对小电流接地故障选线方法的优化分析[J].电子设计工程,2020,(11):106-108.
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收稿日期：2021-09-16作者简介：郭慧文（1967），男，山西大同人，总工程师，高级工程师。通信作者：李陇奇，男，学士，电力系统工程师，主要研究方向为电力系统控制与保护，配网自动化技术。
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