NDLI: Secondary arc current of ultra-high voltage transmission line with a mixed voltage of 1000/500 kV on a single tower

Content Provider	IET Digital Library
Author	Sima, Wenxia Wang, Rong Yang, Ming Yang, Qing Yuan, Tao
Abstract	Among the ultra-high-voltage (UHV) grids in eastern China, the construction of multi-circuit transmission lines with mixed voltages on a single tower is a novel transmission technology that can significantly reduce line corridor coverage, maximise the use of tower height and significantly improve power transmission capacity per area. However, the electromagnetic interaction between lines is complicated and interferes with the secondary arc current. This study proposes a hybrid tower model that incorporates double-circuit transmission lines with alternating currents at 1000 and 500 kV. Its secondary arc current is investigated according to circuit analysis and EMTDC in consideration of the electromagnetic coupling effect, along with the influences of line length, compensation, phase sequence and transposition on the secondary arc current. Results show that a strong secondary arc current is generated for 1000 kV transmission lines in accordance with the UHV hybrid transmission project from Ximeng to Shanghai. This finding should be emphasised. Furthermore, the influence of quadruple-circuit line length on the secondary arc current depends on line voltage rating. Finally, this study presents several methods that may reduce the secondary arc current, such as transposing lines evenly and installing suitable neutral reactors.
Starting Page	686
Ending Page	693
Page Count	8
ISSN	17518687
Volume Number	9
e-ISSN	17518695
Issue Number	Issue 7, Apr (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/9/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2014.0415
Journal	IET Generation, Transmission & Distribution
Publisher Date	2015-03-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	China Circuit Analysis Connector Double-circuit Transmission Line Electromagnetic Coupling Effect Electromagnetic Interaction EMTDC Hybrid Tower Model Insulator Line Corridor Multicircuit Transmission Line Neutral Reactors Poles And Towers Power Grid Power Line Supports Power Transmission Capacity Power Transmission Line Quadruple-circuit Line Secondary Arc Current Shanghai Towers Transmission Technology UHV Grid UHV Hybrid Transmission Project Ultra-high Voltage Transmission Line Voltage 1000 KV Voltage 500 KV Ximeng
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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