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基于广域连接的广东地区接地极连接方案研究

高嘉, 郑智慧, 熊纽, 简翔浩, 陈硕

高嘉,郑智慧,熊纽等.基于广域连接的广东地区接地极连接方案研究[J].南方能源建设,2021,08(04):115-122.. DOI: 10.16516/j.gedi.issn2095-8676.2021.04.015
引用本文: 高嘉,郑智慧,熊纽等.基于广域连接的广东地区接地极连接方案研究[J].南方能源建设,2021,08(04):115-122.. DOI: 10.16516/j.gedi.issn2095-8676.2021.04.015
GAO Jia,ZHENG Zhihui,XIONG Niu,et al.Research on Connection Scheme of HVDC WAN Grounding Electrode In Guangdong Based on Wide-Area Connection[J].Southern Energy Construction,2021,08(04):115-122.. DOI: 10.16516/j.gedi.issn2095-8676.2021.04.015
Citation: GAO Jia,ZHENG Zhihui,XIONG Niu,et al.Research on Connection Scheme of HVDC WAN Grounding Electrode In Guangdong Based on Wide-Area Connection[J].Southern Energy Construction,2021,08(04):115-122.. DOI: 10.16516/j.gedi.issn2095-8676.2021.04.015
高嘉,郑智慧,熊纽等.基于广域连接的广东地区接地极连接方案研究[J].南方能源建设,2021,08(04):115-122.. CSTR: 32391.14.j.gedi.issn2095-8676.2021.04.015
引用本文: 高嘉,郑智慧,熊纽等.基于广域连接的广东地区接地极连接方案研究[J].南方能源建设,2021,08(04):115-122.. CSTR: 32391.14.j.gedi.issn2095-8676.2021.04.015
GAO Jia,ZHENG Zhihui,XIONG Niu,et al.Research on Connection Scheme of HVDC WAN Grounding Electrode In Guangdong Based on Wide-Area Connection[J].Southern Energy Construction,2021,08(04):115-122.. CSTR: 32391.14.j.gedi.issn2095-8676.2021.04.015
Citation: GAO Jia,ZHENG Zhihui,XIONG Niu,et al.Research on Connection Scheme of HVDC WAN Grounding Electrode In Guangdong Based on Wide-Area Connection[J].Southern Energy Construction,2021,08(04):115-122.. CSTR: 32391.14.j.gedi.issn2095-8676.2021.04.015

基于广域连接的广东地区接地极连接方案研究

基金项目: 

中国能源建设股份有限公司科技项目“新型接地极技术及其环境影响研究” CEEC2016-KJ09

详细信息
    作者简介:

    高嘉1982-,男,云南昆明人,高级工程师,学士,从事电网规划管理工作(e-mail)736262021@qq.com

    郑智慧1993-,女,河南信阳人,工程师,硕士,从事变电站、换流站设计研究工作(e-mail)zhengzhihui@gedi.com.cn

    熊纽1989-,男,湖北孝感人,工程师,硕士,从事电力设计咨询工作(e-mail)45370523@qq.com

    简翔浩(通信作者)1975-,男,广东云浮人,高级工程师,学士,从事变电站、换流站设计研究工作(e-mail)jianxianghao@gedi.com.cn

    陈硕1995-,男,广东博罗人,硕士,从事变电站、换流站设计研究工作(e-mail)chenshuo@gedi.com.cn

  • 中图分类号: TM7

Research on Connection Scheme of HVDC WAN Grounding Electrode In Guangdong Based on Wide-Area ConnectionEn

  • 摘要:
      目的  为解决高压直流输电工程中接地极在广东地区选址困难问题,研究将现有接地极连接组成广域接地极供未来直流工程接入,减少对极址周围电气设施、地下金属管道设施的影响。
      方法  分析了现有接地极作为子接地极组成广域接地极的可行性,提出几种典型的广域接地极应用场景,并进行了各子接地极的自然分流计算、均流计算和多回直流同时运行工况计算。
      结果  广域接地极能降低粤东极址的设计要求,缓解鱼龙岭接地极对油气管道和周边电力系统的影响,具有实施的可行性。但在不增加均流电阻的情况下,效益仍不明显。
      结论  该研究为通过采用广域接地极,降低新建接地的难度提供思路和方法。
    Abstract:
      Introduction  To solve the problem of difficult site selection for grounding electrodes in HVDC transmission projects in Guangdong, this paper analyzes the connection of existing grounding electrodes to form a WAN grounding electrode for future DC project access to reduce the impact on electrical facilities and underground metal piping facilities around the electrode site.
      Method  The feasibility of forming a wide-area grounding electrode by using existing grounding electrodes as sub-grounding electrodes was analyzed, several typical application scenarios of WAN grounding electrodes were proposed, and the natural shunted current calculation, current distribution averaging and multiple DC simultaneous operation conditions of each sub-grounding electrode were carried out.
      Result  WAN grounding electrode can reduce the design requirements of Yuedong pole site and mitigate the impact of Yulongling grounding electrode on oil and gas pipeline and surrounding power system, and has the feasibility of implementation. However, the benefits are still not obvious without adding any current averaging resistors.
      Conclusion  This study provides ideas and methods to reduce the difficulty of constructing new grounding electrodes by using WAN grounding electrodes.
  • 图  1   换流站与接地极地理位置分布图

    Figure  1.   Geographic distribution map of converter station & grounding electrodes

    图  2   换流站与接地极系统地理分布示意

    Figure  2.   Geographic demo for converter station & grounding electrodes

    图  3   方案1(田源-鱼龙岭-天堂广域接地极)连接入地电流

    Figure  3.   DC grounding current of plan 1 (Tianyuan-Yulongling-Tiantang DC WAN grounding electrodes)

    图  5   粤东-田源-鱼龙岭(顺序连接)广域顺序连接入地电流(增加均流电阻)

    Figure  5.   DC grounding current for Yuedong-Tianyuan-Yulongling (Sequential connection) with current averaging resistor

    图  6   均流电阻器

    Figure  6.   Current averaging resistor

    图  7   鱼龙岭2回+粤东1回入地电流

    Figure  7.   DC Grounding current of Yulongling 2 loop + Yuedong 1 loop

    表  1   接地极作为广域接地极连接可行性分析

    Table  1   Feasibility analysis of existing grounding electrode as DC WAN grounding electrodes

    接地极额定电流/A广域接地极连接可行性分析
    莘田接地极1 800位于珠三角地区,周边电力设施众多,且额定电流较小,暂不考虑作为广域接地极。
    天堂接地极3 000+周边电力设施和管道已治理,可考虑作为广域接地极。
    3 125
    鱼龙岭接地极3 000有作为广域接地极的需求,周边油气管道和变电站较密集10
    3 125
    田源1+田源2接地极3 125满足广域接地极接入条件,可考虑作为广域接地极。
    3 125+3 125
    观音阁接地极3 000国家电网管理,作为广域接地极接入协调工作量大。
    新村接地极3 200距离西气东输二线管道距离较近,目前接地极闲置,可作为组成广域接地极的终端子接地极,在保证安全的情况下分担部分入地电流11
    下载: 导出CSV

    表  2   广域接地极自然分流主要参数

    Table  2   Major parameters for WAN grounding electrode natural shunted current

    方案广域接地极直流线路接地极分流系数
    总长/km广域连接长度/km造价/亿元田源鱼龙岭天堂新村粤东
    1田源-鱼龙岭-天堂7786097.91768.2%20.9%10.9%
    2田源-新村256871.13173%27%
    3粤东-田源-鱼龙岭-天堂(顺序连接)5454345.64210.6%3.1%0.3%86%
    4粤东-田源-鱼龙岭-天堂(环形连接)8467359.5559%2.9%2.7%85.4%
    5粤东-田源-鱼龙岭(顺序连接)3712603.3810.6%3.4%86%
    6粤东-田源-鱼龙岭(环形连接)5404295.57710.4%13.4%76.2%
    7田源-粤东-鱼龙岭4292603.3861.1%19.5%19.4%

    注:线路按照130万/km造价估算。

    下载: 导出CSV

    表  3   均流电阻与子接地极之间的分流系数关系

    Table  3   Relation between current averaging resistors and shunt coefficient

    均流电阻/Ω粤东接地极分流系数(加不同均流电阻)田源接地极分流系数鱼龙岭接地极分流系数
    086%10.6%3.4%
    0.569.7%23%7.3%
    158.5%31.5%10%
    1.550.5%37.6%11.9%
    244.4%42.2%13.4%
    下载: 导出CSV

    表  4   串联电阻参数

    Table  4   Series resistor parameters

    材料名称电流等级/A总电阻/Ω层数每层并联个数
    特制康铜5000.5108
    下载: 导出CSV

    表  5   广域接地极共三回直流同时同极性单极大地回路运行分流结果

    Table  5   Current shunt result of DC WAN grounding electrodes with simultaneous 3-loop DC (same polarity)

    运行工况粤东接地极(6 250 A)/额定电流百分田源接地极/A鱼龙岭接地极(6 125 A)/额定电流百分
    鱼龙岭2回+粤东1回2 844.7(45%)828.15 577.1(91%)
    鱼龙岭2回+田源1回769(12.3%)2 405.26 075.6(99%)
    粤东2回+田源1回5 983.8(95.7%)2 576.7814.47(13.2%)
    粤东2回+鱼龙岭(穗东换流站)1回5 453.7(87.3%)918.93 002.4(49%)
    粤东2回+鱼龙岭(宝安换流站)1回5 450.5(87.2%)908.82 890.7(47%)
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-01-04
  • 修回日期:  2021-06-08
  • 刊出日期:  2021-12-24

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