A Modeling Optimization for Numerical Analysis of GPR in Multi-Grounding Systems

다중 접지계 GPR 수치 해석을 위한 최적 모델링 기법

  • Lee, Jae-Bok (Electrical Environment & Transmission Group, Electric Power Research Lab, Korea Electrotechnology Research Institute) ;
  • Chang, Sug-Hun (Electrical Environment & Transmission Group, Electric Power Research Lab, Korea Electrotechnology Research Institute) ;
  • Myung, Sung-Ho (Electrical Environment & Transmission Group, Electric Power Research Lab, Korea Electrotechnology Research Institute) ;
  • Cho, Yeon-Gyu (Electrical Environment & Transmission Group, Electric Power Research Lab, Korea Electrotechnology Research Institute)
  • 이재복 (한국전기연구원 전력연구단, 전기환경송전연구그룹) ;
  • 장석훈 (한국전기연구원 전력연구단, 전기환경송전연구그룹) ;
  • 명성호 (한국전기연구원 전력연구단, 전기환경송전연구그룹) ;
  • 조연규 (한국전기연구원 전력연구단, 전기환경송전연구그룹)
  • Published : 2006.11.30

Abstract

This paper describes the numerical analysis techniques using the Combined Integration/Matrix Method to calculate ground potential rise which can be occurred in the various grounding systems. Combined Integration/Matrix Method is used to reduce the error and computation time with the analytical integration equation and the proper segmentaion of earth embedded conductor. To do it, optimal segmentaion method for the buried conductors is presented through error analysis which is capable of applying the practical scaled various grounding systems. The optimum length of segmented element is much co-related with the buried depth of grounding electrode and the maximum length of buried electrode. As a result, less 3 precent errors was obtained by proposed model. The proposed model is applied to verify an effect of multi-grounding problems which was aroused much controversy with separated or common grounding between the high power grounding system and low power grounding system such as signal and telecommunication grounding.

Keywords

GPR(Ground Potential Rise);Combined Integration/Matrix Method;Multi-Grounding System

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