Monte-Carlo-based simulation and investigation of 230 kV transmission lines outage due to lightning

Abstract

Here, using the probabilistic evaluation based on the Monte Carlo method, back-flashover rate and shielding failure flashover rate of 230 kV overhead transmission lines in the western regions of Iran are evaluated. To such an aim, first, the number of thunderstorm days per year is collected from the reported weather information in order to determine the ground flash density. Then, using MRU-200 equipment, the tower-footing resistance of several towers is measured. Matlab® software is used in order to produce lightning surges considering its probabilistic nature and randomly distribution on the ground to evaluate striking distance based on the geometric model. Then, calculated parameters are transferred to EMTP-RV software by establishing a link to perform the transient simulation and report the results for modelled 230 kV transmission line. Finally, considering IEEE-1243 standard, it is shown that due to high ground flash density, using 230 kV tower with one shield wire is not sufficient to protect the line against lightning phenomena.

Keywords

• thunderstorms
• power transmission protection
• flashover
• lightning protection
• power overhead lines
• emtp
• monte carlo methods
• shielding
• poles and towers
• power transmission reliability
• matlab
• power system simulation
• probability
• ieee standards
• transmission lines outage
• probabilistic evaluation
• monte carlo method
• back-flashover rate
• shielding failure flashover rate
• overhead transmission lines
• thunderstorm
• weather information
• tower-footing resistance
• voltage 230.0 kv
• ieee-1243 standard
• iran
• western regions
• ground flash density
• transient simulation
• emtp-rv software
• geometric model
• probabilistic nature
• lightning surges
• matlab software