新投運(yùn)1 000 kV特高壓并聯(lián)電抗器產(chǎn)生乙炔原因及改進(jìn)
喬振朋,趙澤方,姬彥洵,李爽,杜宇軒,王卓
(國網(wǎng)河南省電力公司直流中心,河南 鄭州 450007)
摘 要:對新投運(yùn)的 1 000 kV 特高壓并聯(lián)電抗器產(chǎn)生乙炔原因展開分析,并通過返廠解體檢查確認(rèn)乙炔產(chǎn)生原因?yàn)榇欧致方拥仄c接地線連接不可靠,造成磁分路接地不可靠,發(fā)生接觸性放電。提出了磁分路夾件側(cè)屏蔽管新的接地方式,由原有的屏蔽管與夾件接觸接地更改為屏蔽管與夾件可靠絕緣后用接地線連接,避免因振動(dòng)引起的接觸不可靠,為特高壓并聯(lián)電抗器生產(chǎn)、運(yùn)維檢修提供了參考。
關(guān)鍵詞: 特高壓;并聯(lián)電抗器;磁分路;接地
中圖分類號(hào):TM472 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2023)05-0029-07
Cause and Improvement of Acetylene Generation in the 1 000 kV UHV
Shunt Reactor Newly Put into Operation
QIAO Zhen-peng, ZHAO Ze-fang, JI Yan-xun, LI Shuang, DU Yu-xuan, WANG Zhuo
(State Grid Henan DC Center, Zhengzhou 450007, China)
Abstract: The paper first analyzes why the 1 000 kV UHV shunt reactor newly put into operation generates acetylene through disassembly inspection in the factory, and the cause of it is that the unreliable connection between the grounding strip and the grounding wire of the magnetic shunt leads to unreliable magnetic shunt grounding which makes contact discharge happen. Therefore, a new grounding mode of shielding pipes on the side of magnetic shunt clamps is proposed. It changes the grounding mode from the contact grounding between shielding pipes and clamps to using grounding wires to connect shielding pipes and clamps that have been insulated. This method can avoid unreliable contact caused by vibration,provide great reference for the production, operation and maintenance of UHV shunt reactors.
Key words: ultra high voltage; shunt reactor; magnetic shunt; grounding
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