A novel mathematical modeling of grounding system buried in multilayer Earth

Author

Li, Zhong-Xin ; Chen, Weijiang ; Fan, Jian-Bin ; Lu, Jiayu

Author_Institution

Electr. Power Res. Inst. of China, Beijing, China

Volume

21

Issue

3

fYear

2006

fDate

7/1/2006 12:00:00 AM

Firstpage

1267

Lastpage

1272

Abstract

A novel mathematical model for accurately computing the currents flowing along the high-voltage ac substations´ grounding system and floating metallic conductors buried in the multilayer earth model has been developed in this paper. Not only the conductive effect of currents leaking into the soil, but also capacitive and inductive effects have been considered in this model. To accelerate the calculation, quasi-static complex image method and closed form of Green´s function were introduced into this model. The model is then implemented in a computer program, which can be used to calculate currents distribution of any configuration of the grounding system, and with or without floating metallic conductors under low-frequency harmonic performance.

Keywords

Green´s function methods; conductors (electric); earthing; substation protection; Green´s function; capacitive effect; conductive effect; floating metallic conductor; grounding system; high-voltage ac substation; inductive effect; multilayer earth; quasi-static complex image method; Acceleration; Conductors; Current distribution; Distributed computing; Green´s function methods; Grounding; Mathematical model; Nonhomogeneous media; Soil; Substations; Closed form of Green´s function; grounding system; moment methods; multilayer earth model; nodal analysis; odd harmonic wave; quasistatic complex image method;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2006.875857

Filename

1645164