TY - GEN
T1 - Lightning Impulse Protection for Grid-connected Solid-state Transformers
AU - Xu, Chunmeng
AU - Wei, Jia
AU - Zheng, Liran
AU - Han, Xiangyu
AU - Saeedifard, Maryam
AU - Kandula, Rajendra Prasad
AU - Kandasamy, Karthik
AU - Divan, Deepak
AU - Graber, Lukas
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/10/11
Y1 - 2020/10/11
N2 - A lightning protection scheme is designed and experimentally verified for protecting a 7.2 kV soft-switching solid-state transformer from lightning-induced overvoltage surges. The general design procedures of the lightning protection scheme as well as device selection guidelines are discussed in detail. A prototype has been constructed based on economical, off-the-shelf surge protective devices with unique choices of gapped metal-oxide varistors and air-core inductors. Lightning impulse tests have been performed to evaluate the lightning impulse protective level of the protection scheme, which also experimentally confirm a satisfactory protective ratio between the lightning protection scheme and the solid-state transformer according to the criteria of IEEE Std. C62.22. Working as an independent surge attenuator, the lightning protection scheme is able to protect various kinds of grid-connected converters and facilitate their field deployment in distribution systems.
AB - A lightning protection scheme is designed and experimentally verified for protecting a 7.2 kV soft-switching solid-state transformer from lightning-induced overvoltage surges. The general design procedures of the lightning protection scheme as well as device selection guidelines are discussed in detail. A prototype has been constructed based on economical, off-the-shelf surge protective devices with unique choices of gapped metal-oxide varistors and air-core inductors. Lightning impulse tests have been performed to evaluate the lightning impulse protective level of the protection scheme, which also experimentally confirm a satisfactory protective ratio between the lightning protection scheme and the solid-state transformer according to the criteria of IEEE Std. C62.22. Working as an independent surge attenuator, the lightning protection scheme is able to protect various kinds of grid-connected converters and facilitate their field deployment in distribution systems.
KW - Basic insulation level (BIL)
KW - insulation coordination
KW - lightning
KW - metal-oxide varistor (MOV)
KW - power electronic transformer (PET)
KW - solid state transformer (SST)
KW - surge protection
UR - http://www.scopus.com/inward/record.url?scp=85097154051&partnerID=8YFLogxK
U2 - 10.1109/ECCE44975.2020.9235738
DO - 10.1109/ECCE44975.2020.9235738
M3 - Conference contribution
AN - SCOPUS:85097154051
T3 - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
SP - 6057
EP - 6064
BT - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Y2 - 11 October 2020 through 15 October 2020
ER -