一起換流站極母線直流電壓測量異常原因分析
 

陳明佳，王靚，榮軍，盧雯興，黃聰，李順
（中國南方電網(wǎng)超高壓輸電公司柳州局，廣西 柳州 545026）
 

    摘 要：針對(duì)±500 kV 桂中換流站雙極先后出現(xiàn)極母線直流電壓測量異常的情況，從測量異?，F(xiàn)象入手結(jié)合直流電壓測量裝置原理，依據(jù)現(xiàn)場檢查結(jié)果初步確定了故障位置。通過現(xiàn)場復(fù)現(xiàn)式仿真實(shí)驗(yàn)，確定了故障原因?yàn)檫h(yuǎn)端模塊箱體接地不良造成其前級(jí)電路的電阻一端浮空，通過在遠(yuǎn)端模塊箱體增加屏蔽接地線等方法，消除了測量異常。
    關(guān)鍵詞：直流電壓測量裝置；遠(yuǎn)端模塊；屏蔽接地；復(fù)現(xiàn)式仿真實(shí)驗(yàn)
    中圖分類號(hào)：TM933.2     文獻(xiàn)標(biāo)識(shí)碼：B     文章編號(hào)：1007-3175(2017)04-0046-04
 

Analysis About Abnormal Pole Bus Direct Current Voltage Measurement in Convertor Station

 

CHEN Ming-jia, WANG Liang, RONG Jun, LU Wen-xing, HUANG Cong, LI Shun
（Liuzhou Bureau of China Southern Power Grid Extra High Voltage Power Transmission Company, Liuzhou 545026, China）
 

    Abstract: Aiming at the abnormal high fault condition of bus voltage UdL happened one after another in ±500 kV Guizhong Converter Station’s twin poles, starting from abnormal measurement and combining with the principle of direct current voltage measuring device, this paper preliminarily confirmed the fault location according to the onsite inspection results. The onsite reproduction simulation experiments show that the imperfect grounding of remote terminal unit box caused one end earth free of its preceding stage circuit resistance. The way to add shielding grounding etc. for remote terminal unit box could eliminate abnormal measurement.
    Key words: direct current voltage measuring device; remote terminal unit; shielding grounding; reproduction simulation experiment
 

參考文獻(xiàn)
[1] 歐開健. 電壓測量偏差對(duì)直流輸電系統(tǒng)影響仿真研究[J]. 南方電網(wǎng)技術(shù)，2008，2(1)：28-30.
[2] 國網(wǎng)運(yùn)行有限公司. 換流器及直流控制保護(hù)設(shè)備[M]. 北京：中國電力出版社，2009.