Abstract：Research purposes:With the development of the electrified railways，lightning is one of the important factors which endangering safe and reliable operation of the traction substation. The lightning accident of the traction substation was occurred from time to time. In order to improve the traction substation’s lightning protection level，it is studied according to the lightning accident of a 220 kV traction substation. It’s a typical accident and the equipments of the traction substation are damaged seriously. This study aims to analyze the cause and the process of this accident based on the calculation of the lightning current amplitude，lightning overvoltage，arcing rate，and the short circuit current，give the strengthening measures of lightning protection to avoid the similar accident.
Research conclusions:(1)The direct lightning stroke will be led into the substation when the lightning strikes the
overhead return line if it’S lnstalled t00 high arid the arrester Wlll be destroyed if the Overhead feeder hne lsn’t installed
incoming protection line. (2)Some proposals can improve the substation’s lightning protection lever, such as installing
the incoming lightning protection line of the feeder, strengthening the grounding line，researching the bus一bar
protection relay，and so on.(3)The research results are mainly used for optimization program and design fields on the
traction substation lightning protection.
陈兴强. 牵引变电所防雷加强措施的研究[J]. 铁道工程学报, 2015, 32(6): 76-80.
CHEN Xing一qiang. Research on the Strengthening Measures of Lightning Protection for the
Traction Substation. 铁道工程学报, 2015, 32(6): 76-80.
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