基于ANSYS的陕北换流站直流接地极地电位分布计算

doi:10.11930/j.issn.1004-9649.201711169

摘要/Abstract

摘要： 在特高压直流输电（UHVDC）工程规划设计阶段需要进行地表电位的分布计算，参考了陕北换流站工程中府谷大柳树墕村接地极大地电磁测深（MT）法实测的大地分层电阻率数据，建立了6层大地土壤分层模型，并应用ANSYS计算了在额定运行工况下接地极方圆100km范围内的大地电位分布。结果表明，接地极方圆2km范围内地电位下降迅速，不应规划建设电力、通信、铁道及管道等设施。所得陕北换流站地区已建及远景规划的各变电站及电厂的地电位分布结果，可对陕湖特高压直流输电工程单极运行调试提供参考。

关键词: UHVDC, 直流接地极, ANSYS, 仿真计算, 地面电位分布

Abstract: The distribution of earth surface potential needs to be calculated in UHVDC engineering planning and design. Based on the stratified earth resistivity data measured by magnetotelluric sounding method (MT method) from one China converter station project located in Daliushu Yan Village, Fugu County of Northern Shaanxi, a 6-layer earth soil stratification model is established. The potential distribution in the range of 100 km around the grounding electrode is analyzed by ANSYS under rated operating condition. The results show that the electric potential decreases rapidly in the range of 2 km around the DC grounding electrode, where the facilities of electric power, communications, railways and pipelines shall not be planned and built. The earth surface potential distribution of the built and planned substations and power plants in the area around the Northern Shaanxi converter station has been calculated, and the results can be used as a reference for the single pole operation debugging of Northern Shaanxi-Hubei UHVDC transmission project.

Key words: UHVDC, DC grounding electrode, ANSYS, simulation &, calculation, earth surface potential distribution

中图分类号:

TM721.1

马成廉, 王乐天, 李波, 李颖瑾, 郝洪震, 赵书健, 国敢. 基于ANSYS的陕北换流站直流接地极地电位分布计算[J]. 中国电力, 2018, 51(5): 52-60.

MA Chenglian, WANG Letian, LI Bo, LI Yingjin, HAO Hongzhen, ZHAO Shujian, GUO Gan. Simulation Study on the DC Grounding Electrode Earth Potential Distribution of Northern Shaanxi Converter Station Based on ANSYS[J]. Electric Power, 2018, 51(5): 52-60.

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https://www.electricpower.com.cn/CN/Y2018/V51/I5/52

参考文献

[1] 赵婉君. 高压直流输电工程技术[M]. (第二版). 北京:中国电力出版社, 2011.
[2] 王明新, 张强. 直流输电系统接地极电流对交流电网的影响分析[J]. 电网技术, 2005, 29(3):9-14.WANG Mingxin, ZHANG Qiang. Analysis on influence of ground electrode current in HVDC on AC power network[J]. Power System Technology, 2005, 29(3):9-14.
[3] 周国伟, 顾用地, 周建平, 等. 特高压直流输电系统非特征谐波分析[J]. 电力系统保护与控制, 2016, 44(3):122-128.ZHOU Guowei, GU Yongdi, ZHOU Jianping, et al. Analysis of non-characteristic harmonic in UHVDC system[J]. Power System Protection and Control, 2016, 44(3):122-128.
[4] 刘连光, 马成廉. 基于有限元方法的直流输电接地极多层土壤地电位分布计算[J]. 电力系统保护与控制, 2015, 43(18):1-5.LIU Lianguang, MA Chenglian. Calculation of multi-layer soil earth surface potential distribution of HVDC due to finite element method[J]. Power System Protection and Control, 2015, 43(18):1-5.
[5] 曾连生. 直流输电接地极电流对电力变压器的影响[J]. 高电压技术, 2005, 31(4):57-58+81.ZENG Liansheng. Impact of HVDC ground electrode current on the adjacent power transformers[J]. High Voltage Engineering, 2005, 31(4):57-58, 81.
[6] 刘连光, 崔明德, 孙中明, 等. ±800 kV直流接地极对交流电网的影响范围[J]. 高电压技术, 2009, 35(6):1243-1247.LIU Lianguang, CUI Mingde, SUN Zhongming, et al. Influence scope of AC network by DC grounding electrode rated ±800 kV[J]. High Voltage Engineering, 2009, 35(6):1243-1247.
[7] 魏德军. 直流接地极对地下金属设施的电腐蚀影响[J]. 电网技术, 2008, 32(2):75-77.WEI Dejun. Electro-corrosion impacts of DC grounding electrode on underground metallic facilities[J]. Power System Technology, 2008, 32(2):75-77.
[8] 郭剑. 直流接地极对电气化铁路的电磁影响[J]. 高电压技术, 2013, 39(1):241-250.GUO Jian. Electromagnetic Influences of ground electrode on electrified railway[J]. High Voltage Engineering, 2013, 39(1):241-250.
[9] 刘连光, 闫旭东, 马成廉, 等. 换流变压器编组和受端电网结构对其直流偏磁的影响研究[J]. 电网技术, 2016, 40(1):322-327.LIU Lianguang, YAN Xudong, MA Chenglian, et al. Research of converter transformer marshalling and receiving-end grid structure's effect on converter transformer DC bias[J]. Power System Technology, 2016, 40(1):322-327.
[10] 马成廉, 刘连光, 闫旭东, 等. 高压直流输电接地极电流场相关问题研究[J]. 电网与清洁能源, 2016, 32(2):63-71.MA Chenglian, LIU Lianguang, YAN Xudong, et al. Research on HVDC grounding electrode current field and related issues[J]. Power System and Clean Energy, 2016, 32(2):63-71.
[11] 李强, 叶红枫, 山江川, 等. 高压直流输电系统接地极周围地表电位分析[J]. 中国测试, 2017, 43(6):140-144.LI Qiang, YE Hongfeng, SHAN Jiangchun, et al. Analysis on earth surface potential around the electrode of the high voltage DC power transmission system[J]. China Measurement & Test, 2017, 43(6):140-144.
[12] 裴旵, 吕思颖, 秦昕, 等. 特高压直流输电系统换流站故障过电压研究[J]. 电力系统保护与控制, 2016, 44(12):149-154.PEI Chan, LV Siying, QIN Xin, et al. Study on fault overvoltage of converter station of UHVDC power transmission system[J]. Power System Protection and Control, 2016, 44(12):149-154.
[13] 刘连光, 刘春明, 张冰. 磁暴对我国特高压电网的影响研究[J]. 电网技术, 2009, 33(11):1-5.LIU Lianguang, LIU Chunming, ZHANG Bing. Effects of geomagnetic storm on UHV power grids in China[J]. Power System Technology, 2009, 33(11):1-5.
[14] 朱艺颖, 蒋卫平, 曾昭华, 等. 抑制变压器中性点直流电流的措施研究[J]. 中国电机工程学报, 2005, 25(13):1-7.ZHU Yiying, JIANG Weiping, ZENG Zhaohua, et al. Studying on measures of restraining DC current through transformer neutrals[J]. Proceedings of the CSEE, 2005, 25(13):1-7.
[15] 杜忠东, 董晓辉, 王建武, 等. 直流电位补偿法抑制变压器直流偏磁的研究[J]. 高电压技术, 2006, 32(8):69-72.DU Zhongdong, DONG Xiaohui, WANG Jianwu, et al. Test and analysis on restraining transformer DC bias by changing electric potential of grounding grid[J]. High Voltage Engineering, 2006, 32(8):69-72.
[16] 潘卓洪, 梅桂华, 张露, 等. 抑制变压器直流偏磁的电流注入法[J]. 电力系统自动化, 2009, 33(20):88-91, 108.PAN Zhuohong, MEI Guihua, ZHANG Lu, et al. A current injection method to restrain transformer DC bias[J]. Automation of Electric Power Systems, 2009, 33(20):88-91, 108.
[17] 朱艺颖. 多个特高压直流系统共用接地极的研究[J]. 电网技术, 2007, 10:22-27.ZHU Yiying. Study on sharing earth electrode by rectifiers or inverters of some UHVDC systems[J]. Power System Technology, 2007, 31(10):22-27.
[18] 刘春明, 黄彩臣, 潘明明, 等. 抑制变压器直流偏磁的电容隔直装置优化配置[J]. 高电压技术, 2016, 42(7):2308-2314.LIU Chunming, HUANG Caichen, PAN Mingming, et al. Optimal configuration of capacitor blocking devices for suppressing DC bias in transformers[J]. High Voltage Engineering, 2016, 42(7):2308-2314.
[19] 国网北京经济技术研究院, 山东电力工程咨询院有限公司, 陕西省电力设计院. 陕北±800 kV换流站接地极设计专题研究[R]. 北京:国网北京经济技术研究院, 2016.
[20] 吴文克, 鲁志伟, 张航, 等. 直埋电力电缆动态增容和双线增容策略研究[J]. 东北电力大学学报, 2016, 36(5):7-12.WU Wenke, LU Zhiwei, ZHANG Hang, et al. Research on dynamic capacity increase and double-circuit capacity increase strategy for buried power cable[J]. Journal of Northeast Dianli University, 2016, 36(5):7-12.
[21] 鲁志伟, 张航, 敖明, 等. 电缆载流量试验热稳定判据及试验误差的研究[J]. 东北电力大学学报, 2016, 36(5):25-31.LU Zhiwei, ZHANG Hang, AO Ming, et al. Research of thermal time constant and steady criterion used in the power cables ampacity test[J]. Journal of Northeast Dianli University, 2016, 36(5):25-31.
[22] 底青云, 王妙月. 稳定电流场有限元法模拟研究[J]. 地球物理学报. 1998, 41(2):252-260.DI Qingyun, WANG Miaoyue. The real-like 2D FEM modeling research on the field characteristics of direct electric current field[J]. Acta Geophysica Sinica. 1998, 41(2):252-260.
[23] 马成廉, 刘连光, 王乐天, 等. 高压直流输电接地极地电位分布ANSYS仿真[J]. 电网与清洁能源, 2017, 33(4):19-26.MA Chenglian, LIU Lianguang, WANG Letian, et al. The ANSYS simulation of HVDC grounding electrode potential distribution[J]. Power System and Clean Energy, 2017, 33(4):19-26.
[24] 陈德志, 黄振华, 刘杰, 等. 水平分层土壤中点电流源电流场的计算[J], 高电压技术, 2008, 34(7):1379-1382.CHEN Dezhi, HUANG Zhenhua, LIU Jie, et al. Calculation of current field due to a point source in multi-layer soil[J]. High Voltage Engineering, 2008, 34(7):1379-1382.
[25] 刘曲, 李立浧, 郑健超. 复合土壤模型下HVDC系统单极大地运行时的电流分布[J]. 中国电机工程学报, 2007, 27(36):8-13.LIU Qu, LI Licheng, ZHENG Jianchao. DC currents distribution in HVDC systems of monopolar operation with ground return in complex soil structure[J]. Proceedings of the CSEE, 2007, 27(36):8-13.
[26] 陆继明, 肖冬, 毛承雄, 等. 直流输电接地极对地表电位分布的影响[J]. 高电压技术, 2006, 32(9):55-58, 91.LU Jiming, XIAO Dong, MAO Chengxiong, et al. Analysis of effects of DC earthed pole on earth surface potential distributions[J]. High Voltage Engineering, 2006, 32(9):55-58, 91(in Chinese).
[27] 马成廉, 刘利则, 徐冰, 等. 特高压直流输电接地极大地电阻率测量方法研究[J]. 电网与清洁能源, 2015, 31(3):6-10, 17.MA Chenglian, LIU Lize, XU Bing, et al. Study of the measurement methods of soil resistivity in HVDC transmission ground electrodes[J]. Power System and Clean Energy, 2015, 31(3):6-10, 17.
[28] 董博, 王泽忠, 刘连光, 等. 大地电导率横向突变处磁暴感应地电场的邻近效应[J]. 地球物理学报, 2015, 58(1):238-246.DONG Bo, WANG Zezhong, LIU Lianguang, et al. The proximity effect on the induced geoelectric field at the interface of different conductivity structures with lateral variations during geomagnetic storms[J]. Chinese Journal Geophysics, 2015, 58(1):238-246.
[29] 张东, 陶凤源, 董新胜, 等. 哈密地区变压器直流偏磁仿真分析及抑制措施研究[J]. 电瓷避雷器, 2015(1):87-92.ZHANG Dong, TAO Fengyuan, DONG Xinsheng, et al. Analysis and simulation of transformer DC bias and measures of suppression in Hami region[J]. Insulators and Surge Arresters, 2015(1):87-92.
[30] 曹方圆, 时卫东, 康鹏, 等. 接地材料对杆塔接地装置冲击接地阻抗的影响[J]. 中国电力, 2016, 49(10):67-73.CAO Fangyuan, SHI Weidong, KANG Peng, et al. Influence of ground material on the impulse ground impedance of tower's grounding devices[J]. Electric Power, 2016, 49(10):67-73.
[31] 祝郦伟, 沈晓明, 杨帆, 等. 基于正则化的接地网断开故障诊断方法[J]. 中国电力, 2016, 49(11):31-35.ZHU Liwei, SHEN Xiaoming, YANG Fan, et al. Break fault diagnosis method of grounding grids based on regularization[J]. Electric Power, 2016, 49(11):31-35.
[32] 张怿宁, 王彩芝, 陈平, 等. 直流接地极线路故障暂态行波传播特性分析[J]. 中国电力, 2015, 48(3):88-93.ZHANG Yining, WANG Caizhi, CHEN Ping, et al. Analysis of propagation characteristics of transient traveling waves in HVDC grounding electrode line faults[J]. Electric Power, 2015, 48(3):88-93.
[33] 傅敏, 闫风洁, 雍军, 等. 铝铜稀土合金接地材料研究[J]. 中国电力, 2015, 48(9):100-105.FU Min, YAN Fengjie, YONG Jun, et al. Research on grounding material of AlCuRE alloy[J]. 2015, 48(9):100-105.