China Safety Science Journal ›› 2020, Vol. 30 ›› Issue (2): 140-145.doi: 10.16265/j.cnki.issn1003-3033.2020.02.022

• Technology and engineering of disaster prevention and mitigation • Previous Articles     Next Articles

Protection measure against lightning overvoltage of oil and gas pipelines near transmission lines

HU Yuanchao1, LIU Le1, AN Yunzhu1, XIANG Zhen2, HUANG Tao3, LYU Qishen2   

  1. 1. Electrical and Electronic Engineering College, Shandong University of Technology, Zibo Shandong 255000, China;
    2. Shenzhen Power Supply Co., Ltd., Shenzhen Guangdong 518000, China;
    3. State Grid Jiangsu Power Engineering Consulting Limited Company, Nanjing Jiangsu 210000, China
  • Received:2019-11-15 Revised:2020-01-19 Online:2020-02-28 Published:2021-01-25

Abstract: In order to study influence of epitaxial ray structure of grounding grid on its drainage, protection measures were proposed to reduce overvoltage of oil and gas pipelines near transmission towers caused by the natural disaster of lightning. Firstly, lightning protection calculation software CDEGS was used to build a structural model of grounding grid and nearby pipelines. Then, influence of epitaxial rays in three states, namely approaching, deviating and parallel, on pipelines' potential was studied in conditions of different current amplitude, soil resistivity and pole tower and pipeline spacing, and variation law of pipeline overvoltage after adoption of continuation scheme was explored. The results show that influence of drainage capacity of epitaxial rays at three states on lightning overvoltage of pipelines shows different trends. After adoption of continuation scheme, the overvoltage is significantly reduced, therefore this scheme can be used as a protection measure against pipeline lightning overvoltage.

Key words: buried pipeline, grounding grid, structural optimization, lightning overvoltage, pipeline protection

CLC Number: