INSULATION COORDINATION STUDY OF LIGHT ELECTRIFIED RAILWAY SYSTEM - ANALYSIS OF LIGHTNING OVERVOLTAGES (original) (raw)

INSULATION COORDINATION STUDY OF LIGHT ELECTRIFIED RAILWAY SYSTEM - ANALYSIS OF LIGHTNING OVERVOLTAGES

2018, INSULATION COORDINATION STUDY OF LIGHT ELECTRIFIED RAILWAY SYSTEM - ANALYSIS OF LIGHTNING OVERVOLTAGES

INSULATION COORDINATION STUDY OF LIGHT ELECTRIFIED RAILWAY SYSTEM - ANALYSIS OF LIGHTNING OVERVOLTAGES. Lightning overvoltages is known to be one of the primary problems in high Keraunic areas producing line outage rates. Lightning overvoltages are one of the most severe problems that affect the power distribution system of electrified railways. For this reason, insulation coordination is a requirement of the uttermost importance in power system design, relying on assessment and control of overvoltage stresses with adequate protective devices, contributing to reliability of equipment and system performance. Lightning usually causes temporary faults on the power distribution system of electrified railways. The evaluation of the effect of surge arresters during lightning stroke events and estimate calculations of transient phenomena using in ATP-EMTP software; in order to estimate practical solutions for a lightning protection design, it’s necessary to implement electromagnetic transient models of the system and perform simulations of the transient process. ATP-EMTP is used for modeling and simulation. The resultant overvoltages are related to possible surge arrester protective schemes and railways power system BIL's "basic impulse level (BIL)."