摘要
直流输电入地电流路径具有较大的穿透深度,其电阻率测量难度较大,针对此,提出一种直流输电入地电流路径的大范围电阻率的混合测量与反演方法,该方法通过联合应用四极法和大地电磁法,可以更有效地测量覆盖地表到地下上百公里深度的大地电阻率。在测量数据的反演处理方面,提出嵌入局部共轭梯度搜索的人工蜂群全局优化反演方法,该方法在全局型优化的方法上集成了局部共轭梯度搜索,是目前较高效的混合反演方案。算例证明所提方法具有较高的测量和反演精度。
Earth current path of direct current( D C) transmission has large penetration depth,which causes great difficulty in measuring its resistivity. T herefore,this paper presents a kind of hybrid measurement and inversion method for a wide range of resistivity of earth current path of D C transmission which is to combine four-electrode method and magneto-telluric method to measure earth resistivity of hundreds of kilometers depth covering fromthe surface to the underground. In the aspect of inversion of measuring data,it presents a global optimization inversion method of artificial bee algorithmembedded with conjugate gradient local search which is to integrate partial conjugate gradient local search on the basis of global optimization method.T his inversion method is a high efficient hybrid inversion proposal at present. Examples prove high measurement and inversion precision of proposed methods.
出处
《广东电力》
2017年第9期97-103,共7页
Guangdong Electric Power
基金
中国南方电网有限责任公司科技项目(GDKJXM 00000009)
关键词
大地电阻率测量
四极法
大地电磁法
反演
共轭梯度蜂群算法
earth resistivity measurement
four-electrode method
magneto-telluric method
inversion
artificial bee algorithm with conjugate gradient local search
