NDLI: Experimental study on lighting shielding performance of “b500 kV HVDC transmission lines

Content Provider	IEEE Xplore Digital Library
Author	He Junjia He Hengxin
Copyright Year	2009
Description	Author affiliation: Huazhong University of Science & technology (He Junjia; He Hengxin)
Abstract	This paper is to investigate the lightning shielding performance of the HVDC transmission line when taking the dc operation voltage into account. Firstly, the equivalency of the scale experiment is discussed from the following aspects: (a) the determination of test scale factor; (b) the electric field simulation of downward leader; (c) nominal field simulation of the HVDC transmission line. Secondly, a test circuit is established taking into account of the isolation of the dc charge circuit and surge generator. The exposure space distribution of the HVDC transmission line is obtained from a large amount discharge experiments. The total number of recorded discharge is over 7500 times. The competition between upward streamers originating from the grounded wire and polar conductor is observed by using the high-speed digital camera. Finally, the effectiveness mechanism of the dc operation voltage on the lightning shielding performance of HVDC transmission line is analyzed according to the recorded phenomenon. Based on the EGM conception, the qualitatively effect of the dc operation voltage is calculated. It reveals that the shielding failure flashover rate of the 500kV positive polar is 4.84 times than that not taking account of the dc operation voltage.
Starting Page	1
Ending Page	1
File Size	264303
Page Count	1
File Format	PDF
ISBN	9781424442416
ISSN	19449925
DOI	10.1109/PES.2009.5275779
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-26
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	HVDC transmission Voltage Circuit testing Lightning Circuit simulation Surges DC generators Wire Conductors Digital cameras
Content Type	Text
Resource Type	Article

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