|
|
|
| Modeling Method of Geoelectric Structure Near DC Grounding Electrode Based on Kriging Method |
| Si Yuan1, Wang Zezhong1, Liu Lianguang2, Li Haiming3, Shao Wenguo3 |
1. Beijing Key Laboratory of High Voltage and EMC North China Electric Power University Beijing 102206 China;
2. State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China;
3. State Grid Inner Mongolia Eastern Power Co. Ltd Huhhot 010000 China |
|
|
|
|
Abstract The inaccuracy of geoelectric structure model is the main reason for the low accuracy of the impact assessment of grounding electrode current on AC power grid. Due to insufficient original data of earth resistivity, the bias current can only be calculated by relying on an oversimplified earth model. Aiming at the problem of low modeling accuracy, this study proposes to use the depth profile data of magnetotelluric sounding to make Kriging prediction of the unknown scattered point resistivity between the sections, and form the scattered point earth resistivity model, and combine the multi seed region growth method to block the scattered point geoelectric structure. Using the measured data of the bias current of the substation around the Zhalute grounding electrode of the ±800kV Zhaqing DC transmission project proves that the electrical structure model established by the Kriging method is more accurate.
|
|
Received: 17 September 2019
|
|
|
|
|
|
[1] 郝黎明, 王东来, 卢铁兵, 等. 计及金属回流线影响的±500kV高压直流输电线路地面合成电场计算分析[J]. 电工技术学报, 2019, 34(12): 2468-2476.
Hao Liming, Wang Donglai, Lu Tiebing, et al.Calculation and analysis og ground-level total electric field under ±500kV HVDC lines considering the influence of metal return lines[J]. Transactions of China Electrotechnical Society, 2019, 34(12): 2468-2476.
[2] 滕予非, 李小鹏, 林圣, 等. 特高压直流系统接地极线路阻抗监视系统适应性研究[J]. 电工技术学报, 2019, 34(19): 4154-4161.
Teng Yufei, Li Xiaopeng, Lin Sheng, et al.Adaptability analysis of fault supervision system for long electrode line of UHVDC[J]. Transactions of China Electrotechnical Society, 2019, 34(19): 4154-4161.
[3] 陈剑, 刘春明, 王茂海, 等. 广义有限差分法在静态电磁场计算中的应用[J].电工技术学报, 2018, 33(7): 1579-1587.
Chen Jian, Liu Chunming, Wang Maohai, et al.Application of the generalized finite difference method to static electromagnetic problems[J]. Transactions of China Electrotechnical Society, 2018, 33(7): 1579-1587.
[4] Zou J, Liu Y Q, Yuan J S, et al.Analysis of the toroidal HVDC grounding systems in horizontal multilayer soils[J]. IEEE Transactions on Magnetics, 2006, 42(4): 1435-1438.
[5] Li Wei, Pan Zhuohong, Lu Hailiang, et al.Influence of deep earth resistivity on HVDC ground-return currents distribution[J]. IEEE Transaction on Power Delivery, 2012, 10(18): 1835-1842.
[6] 刘春明, 林晨翔, 王小宁, 等. 海岸效应对电网地磁感应电流的影响[J]. 电网技术, 2017, 41(8): 2716-2722.
Liu Chunming, Lin Chenxiang, Wang Xiaoning, et al.Impact of coast effect on geomagnetically induced current in power grid[J]. Power System Technology, 2017, 41(8): 2716-2722.
[7] 刘春明, 林晨翔, 王璇, 等. 大地电导率横向变化对地磁暴感应电场H极化及地磁感应电流的影响[J]. 电工技术学报, 2016, 31(24): 113-119.
Liu Chunming, Lin Chenxiang, Wang Xuan, et al.Evaluating the influence of lateral change of conductivity on the “H Polarization” of induced geoelectric field and geomagnetically induced current[J]. Transactions of China Electrotechnical Society, 2016, 31(24): 113-119.
[8] 刘连光, 姜克如, 李洋, 等. 直流接地极近区三维大地电阻率模型建立方法[J]. 中国电机工程学报, 2018, 38(6): 1622-1630, 1898.
Liu Lianguang, Jiang Keru, Li Yang, et al.Three-dimensional earth resistivity structure modelling around DC ground electrode[J]. Proceedings of the CSEE, 2018, 38(6): 1622-1630, 1898.
[9] 陶瑞祥, 王泽忠. 基于有限元的电场区域分解法的广义极小残量迭代算法[J]. 电工技术学报, 2018, 33(2): 225-231.
Tao Ruixiang, Wang Zezhong.Generalized minimal residual iteration method for finite based domain decomposition technique for electric field problem[J]. Transactions of China Electrotechnical Society, 2018, 33(2): 225-231.
[10] 董树文, 李廷栋, 陈宣华, 等. 我国深部探测技术与实验研究进展综述[J]. 地球物理学报, 2012, 55(12): 3884-3901.
Dong Shuwen, Li Tingdong, Chen Xuanhua, et al.Progress of deep exploration in mainland China: A review[J]. Chinese Journal of Geophysics, 2012, 55(12): 3884-3901.
[11] 董树文, 李廷栋. Sino Probe—中国深部探测实验[J]. 地质学报, 2009, 83(7): 895-909.
Dong Shuwen, Li Tingdong.Sino Probe: the exploration of the deep interior beneath the Chinese continent[J]. Acta Geologica Sinica, 2009, 83(7): 895-909.
[12] 李晓军, 王长虹, 朱合华. Kriging插值方法在地层模型生成中的应用[J]. 岩土力学, 2009, 30(1): 157-162.
Li Xiaojun, Wang Changhong, Zhu Hehua, et al.Kriging interpolation and its application to generating stratum model[J]. Rock and Soil Mechanics, 2009, 30(1): 157-162.
[13] Oliver M A, Webster R.Kriging: a method of interpolation for geographical information systems[J]. International Journal of Geographical Information Science, 1990, 4(3): 313-332.
[14] Pang Su, Li Tianxuan, Wang Yengdong, et al.Spatial interpolation and sample size optimization for oil copper (Cu) investigation in cropland soil at county scale using Co-Kriging[J]. Agricultural Sciences in China, 2009, 8(11): 1369-1377.
[15] 闫东阳, 明冬萍. 基于自动多种子区域生长的遥感影像面向对象分割方法[J]. 工程科学学报, 2017, 39(11): 1735-1742.
Yan Dongyang, Ming Dongping.Object-oriented remote sensing image segmentation based on automatic multispeed region growing algorithm[J]. Chinese Journal of Engineering, 2017, 39(11): 1735-1742.
[16] 孔俊, 王佳男, 谷文祥, 等. 基于区域的自动种子区域生长法的彩色图像分割算法[J]. 东北师大学报(自然科学版), 2008, 40(4): 47-51.
Kong Jun, Wang Jianan, Gu Wenxiang, et al.Automatic SRG based region for color image segmentation[J]. Journal of Northeast Normal University(Natural Science Edition), 2008, 40(4): 47-51.
[17] Frank Y Shih, Cheng S X.Automatic seeded region growing for color image segmentation[J]. Image and Vision Computing, 2005, 30(23): 877-886.
[18] 程佩芬, 李崇涛, 傅闯, 等. 基于状态空间法的高压直流输电系统电磁暂态简化模型的解析算法[J].电工技术学报, 2019, 34(6): 1230-1239.
Cheng Peifen, Li Chuntao, Fu Chuang, et al.An analytic solution for simplified electromagnetic transient model of HVDC transmission system based on state space method[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1230-1239. |
|
|
|
2020, Vol. 35 
