TITLE:
Study of Lightning Damage Risk Assessment Method for Power Grid
AUTHORS:
Xiaolan Li, Jiahong Chen, Chun Zhao, Shanqiang Gu
KEYWORDS:
Power Grid; Lightning Damage Risk Assessment; Analytic Hierarchy Process; Lightning Stroke Trip-out Rate; Power Supply Reliability; Transmission Line
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
21,
2013
ABSTRACT: Based on the idea of risk evaluation, the existing
lightning damage risk assessment methods are reviewed and summarized in this
paper. And the power grid lightning damage risk assessment system is
established on the basis of lightning flashover risk evaluation methodology for
transmission lines, and adopts the improved Analytic Hierarchy Process as the
core algorithm. It can comprehensively evaluate the risk for transmission lines
of regional grid, various sections of a line and each tower of the section,
considering much more impact factors, including the running time of line, importance of grades, equipment
damage, and the success rate of lightning stroke reclosing and so on. According to the calculation results of the risk assessment of the
analytic hierarchy process and lightning flashover risk evaluation, the
principles and methods of grade classification for power grid lightning damage
risk map are studied, and give typical examples in the paper. It can describe the
lightning withstanding ability much more scientifically and provide important
references for the manage department of power system.