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
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