Light rail transit DC traction power system surge overvoltage protection

Paul, Dev

doi:10.1109/icps.2001.966516

Cited by 12 publications

(4 citation statements)

References 15 publications

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“…Grounding and bonding will aid in controlling negative influences such as electromagnetic interference and to achieve a suitable earth protection system. From the literature, authors [20][21][22][23] have exhaustively reported about the surge protection schemes employed for power distribution and the rail traction systems. Also IEEE standard [24] provides recommendations for the design and installation practices to be adopted for the grounding electronic, telecommunication and distributed computing systems, while [25] explains methods to be adopted for surge protection equipment used in low voltage telecommunication circuits.…”

Section: (Iii) System Ground For Exchangementioning

confidence: 99%

Protection of Digital Telecom Exchanges Against Lightning Surges and Earth Faults

Reddy

Verma

2015

IEEE Trans. on Ind. Applicat.

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Low power electronic devices used in digital telecom exchanges are vulnerable to surge voltages and currents primarily originating from natural lightning, or due to the direct interactions between electric power and telecommunication lines etc, causing the earth/ground potential rise, neutral potential rise and faults in the system. The fault currents may flow directly to telecom lines or through the equipment to the customer's premises causing adequate damage to the equipment and personnel safety. In wire line applications, analog or digital, central office, exchanges and subscriber sides have to be protected. Decisive protection and the protective methods have to be employed for proper functioning of the equipment under overvoltage/over current conditions. Present investigation reports some interesting results obtained on the recently developed high voltage high current protection cards used in digital telecom exchanges. The performance of protection cards both for the ring wave and hybrid wave surges are evaluated and presented. The surge generators required for the investigation are developed and fabricated in house as per the relevant telecom standards.

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Section: (Iii) System Ground For Exchangementioning

confidence: 99%

Protection of Digital Telecom Exchanges Against Lightning Surges and Earth Faults

Reddy

Verma

2015

IEEE Trans. on Ind. Applicat.

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“…Adopting the adjoint network method into the analysis of the traction network is a beneficial exploration. The research activity in area of electromagnetic transients in traction systems was rather limited [8][9][10][11][12]. The conducted emission propagate in the entire electrified railway systems, the complete frequency spectrum of which could start from DC and extremely low frequency to 1 MHz [13,14].…”

Section: Introductionmentioning

confidence: 99%

The Detailed Representation and Computation of the Traction Network and its Application to the Transient Analysis in Electrified Railways

Zhai

Wang

Ying

et al. 2021

IEEJ Transactions Elec Engng

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This paper intends to derive a detailed representation and attain a suitable computation method for the traction network. The transient analysis of the lossy multiconductor transmission lines (MTLs) is performed considering the electromagnetic characteristics of the rail track, which accounts for the frequency-dependent and distributed nature of the line parameters over the entire frequency range for the traction network. Due to the practical difficulty in wideband parameter determination and the complex layout for the traction power supply system, the model implemented has been validated by comparison to several field tests that are carried out on a real high speed railway line for the purpose of identifying possible power quality problem. The good high representation of the frequency-dependent parameter and the numerical solution will provide a reliable method for the transient analysis of the electrified railway. Afterwards, the transient calculation using vector fitting and modal decomposition is presented to evaluate how the emission is propagating along the MTLs of the electrified railways. Performing detailed and suitable analysis is necessary to determine the overvoltage conditions during the transients. The outcome of the analysis could be beneficial for the transient protection study in the electrified railway system.

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“…All of the abovementioned phenomena are of a paramount importance to protective relays whose operation can be affected by overvoltage or overcurrent occurrence. Although analyses of switching transients for power electrical systems were performed by other researches in the past [7][8][9][10][11][12][13][14][15], the research activity in area of electromagnetic transients in traction systems was rather limited [2,6,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%