373 0

Analysis of Transient Behavior of Mixed High Voltage DC Transmission Line Under Lightning Strikes

Title
Analysis of Transient Behavior of Mixed High Voltage DC Transmission Line Under Lightning Strikes
Author
이방욱
Keywords
DC cable; dielectric breakdown; HVDC transmission; insulation coordination; insulator flashover; lightning overvoltage; negative lightning strokes; parametric analysis; PSCAD/EMTDC; sheath grounding
Issue Date
2018-12
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE ACCESS, v. 7, Page. 7194-7205
Abstract
Growing urbanization coupled with increased power demands have led to increasing use of mixed power transmission lines with sections of overhead lines (OHL) and underground cables. Due to differences in surge impedance of cables and OHL, voltage surges experience re ections and refractions at their boundaries which make the transient behavior of mixed high voltage direct current (HVDC) line quite peculiar. Lightning strikes on overhead sections of lines induce voltage surges that travel along OHL and enter the cable section. Lightning overvoltage can cause OHL insulators to ashover and stress cable insulation or cause its permanent breakdown. In this paper, we simulated a fast front model of a mixed HVDC transmission line using an electromagnetic transient simulation program (PSCAD) to analyze its transient behavior under a lightning strike. The leader progression model has been used to predict the dielectric performance of OHL insulators. It has been shown that transition towers adjacent to the cable section are much less vulnerable to ashover than subsequent towers. The length of a riser section (connecting OHL and cable) and tower footing impedance have shown to signi cantly in uence the ashover performance of OHL insulators. In addition, the length of cable segments and sheath grounding impedance has been found to in uence cable overvoltage. This paper can be used to evaluate the insulation coordination and overvoltage protection requirements for a mixed HVDC transmission line.
URI
https://ieeexplore.ieee.org/abstract/document/8590704https://repository.hanyang.ac.kr/handle/20.500.11754/99210
ISSN
2169-3536
DOI
10.1109/ACCESS.2018.2889828
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE