NDLI: The distributing characteristics of sediment deposited on pin-type grading electrodes in inner cooling circuit of HV converter valve

Content Provider	IEEE Xplore Digital Library
Author	Chenxing Wang Xuezhong Liu Xianrong Wang Ning Liu Xiuying Jiao Yijiang Tan
Copyright Year	2015
Description	Author affiliation: China XD Group, Xi'an XD Power Syst. Co., Ltd., Xi'an, China (Ning Liu; Xiuying Jiao; Yijiang Tan) \|\| State Key Lab. of Electr. Insulation & Power Equip., Xi'an Jiaotong Univ., Xi'an, China (Chenxing Wang; Xuezhong Liu; Xianrong Wang)
Abstract	Inorganic sediments frequently deposit on the pin-type grading electrodes installed in the inner cooling circuits for high voltage converter valves. This investigation focuses on the distributing characteristics of deposited sediments. Field data have been collected from three ±500kV converter stations. Sediment distributions corresponding to different valve tower structures are summarized. The relationships between sediment thickness and electrode locations in both horizontal and vertical components of converter valve are analyzed. The chemical compositions of field-collected sediment samples are analyzed by means of energy dispersive spectrometer (EDS). Electrical insulating properties of the samples are measured. The results indicate that the deposition degree of the sediment is mainly dominated by the electrical current through the pin-type grading electrode. The electronegative sediment particles tend to deposit on the grading electrodes with positive polarity. The deposited sediment is mainly composed of aluminum oxide compounds and may impact the uniform effect of the grading electrode.
Starting Page	24
Ending Page	28
File Size	1038381
Page Count	5
File Format	PDF
ISBN	9781479973521
e-ISBN	9781479973545
DOI	10.1109/ICACACT.2014.7223592
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sediments Power measurement Valves Chemicals HVDC transmission Electric potential sediment converter valve inner cooling system grading electrode
Content Type	Text
Resource Type	Article

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