直流接地极精细大地模型的勘探与计算  

Exploration and Calculation of Very Fine Geodetic Model for DC Grounding Electrodes

作　　者：岳国良 穆永保[2] 贾志辉 闫柯柯[2] 奚涛 潘卓洪 YUE Guoliang;MU Yongbao;JIA Zhihui;YAN Keke;XI Tao;PAN Zhuohong(State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050000,China;State Grid Handan Electric Power Supply Company,Handan 056035,China;Anhui Zhengguang Electric Power Technology Company,Hefei 230088,China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China)

机构地区：[1]国网河北省电力有限公司,石家庄050000 [2]国网邯郸供电公司,邯郸056035 [3]安徽正广电电力技术有限公司,合肥230088 [4]华北电力大学河北省输变电设备安全防御重点实验室,保定071003

出　　处：《高电压技术》2021年第11期3901-3912,共12页High Voltage Engineering

基　　金：国家自然科学基金(51607129);国家电网公司科技项目(变压器中性点双重保护单元无源隔直装置的研发与应用)(SGHEHD00JXJS700612)。

摘　　要：目前直流接地极大地电阻率勘探在方法应用、数据解释和反演求解等方面还存在一些技术困难,增加了直流接地极的设计运行及其对周边环境的影响评估的不确定性。首先对比了5种地质学的勘探方法应用于精细大地电性勘探的技术特征,提出了使用考虑埋深的和基于传输线模型的线性滤波法解决水平层状直流接地极精细大地模型求解时存在理论难度高和算法复杂的问题,并给出了验证的算例。其次提出了一种四极法与可控源音频大地电磁法联合应用来校正静态效应的精细大地电性勘探方案。在磁法勘探反演目标函数中加入四极法反演取得浅层电性模型的约束条件,有效实施了某极址磁法勘探静态效应的校正案例,并分别通过电位拟合法和电测井法验证了有效性。应用结果表明:线性滤波法为精细大地模型提供了高精度的简捷求解手段,可作为复镜像法的有效补充。另外,引入四极法校正静态效应可以有效提高磁法勘探的测深和准确性,为精细大地参数的多方法联合勘探与反演提供了新思路。At present,there are still some technical difficulties in the application of methods,data interpretation and inversion in DC ground earth resistivity exploration,which give rise to a number of technical problems,and lead to the uncertainty in the evaluation of the design operation of DC grounding electrodes and their impact on the surrounding environment.The technical characteristics of five geologic exploration methods applied to fine geodetic electrical exploration are firstly compared,and the linear filtering considering the depth of burial and the transmission line model is proposed to solve the problem of high theoretical difficulty and complicated algorithm in solving the fine earth model of the horizontal layered DC grounding electrode,and a validated case is presented.Secondly,the four-point method and controlled-source audio geo-electromagnetic method are jointly applied to correct their static effects on fine geo-electric exploration scheme.The shallow electrical model by the four-point method is applied to the magnetic exploration inversion objective function so as to get the constraints of the model.For a DC grounding electrode site,the static effects of the magnetic method of exploration is corrected and validated by potential fitting method and electrical logging method,respectively.The application results show that the linear filtering method provides a high-precision and simple method for solving the fine geodetic model,and it can be used as an effective supplement to the complex image method.In addition,the introduction of the four-point method to correct the static effect can effectively improve the sounding and accuracy of magnetic exploration,which provides a new idea for multi-method joint exploration and inversion of fine geodetic parameters.

关 键 词：直流接地极 精细大地模型 线性滤波法 四极法 可控源音频大地电磁法 静态效应 

分 类 号：TM934.1[电气工程—电力电子与电力传动]