Electromagnetic analysis of lightning surge response of interconnected wind turbine grounding system

Author

Ahmed, Md Raju ; Ishii, Masaru

Author_Institution

Inst. of Ind. Sci., Univ. of Tokyo, Tokyo, Japan

fYear

2011

fDate

3-7 Oct. 2011

Firstpage

226

Lastpage

231

Abstract

IEC TR61400-24 [1] suggests interconnection of the grounding system of wind turbines to achieve low steady-state resistance, however, the transient behavior during a lightning strike to the interconnected wind turbine grounding system remains to be discussed. This paper investigates the influence of interconnection on the lightning surge response of wind turbine grounding system. Two different numerical methods, Numerical Electromagnetics Code (NEC-4) based on Method of Moments (MoM), and Virtual Surge Test Lab (VSTL) based on Finite Difference Time Domain (FDTD) method are used for electromagnetic analysis of lightning surge response of wind turbine grounding system. Comparison of results using NEC-4 and VSTL are made to clarify the usefulness of these methods for transient analysis of a large grounding system. The influences of resistivity of soil and front time of lightning impulse current, on the response of interconnected wind turbine grounding system are analyzed.

Keywords

earthing; finite difference time-domain analysis; lightning protection; method of moments; power system interconnection; surge protection; wind turbines; FDTD method; IEC TR61400-24; MoM; NEC-4; VSTL; electromagnetic analysis; finite difference time domain method; interconnected wind turbine grounding system; lightning impulse current; lightning strike; lightning surge response; method of moment; numerical electromagnetics code; numerical method; virtual surge test lab; Conductivity; Grounding; Lightning; Soil; Voltage measurement; Wind turbines; Wires; FDTD method; MoM; NEC-4; VSTL; Wind turbine grounding; interconnected grounding system; numerical electromagnetic analysis; transient response;

fLanguage

English

Publisher

ieee

Conference_Titel

Lightning Protection (XI SIPDA), 2011 International Symposium on

Conference_Location

Fortaleza

Print_ISBN

978-1-4577-1898-4

Type

conf

DOI

10.1109/SIPDA.2011.6088443

Filename

6088443