高壓直流輸電用閥電抗器鐵芯損耗試驗研究
黃華,張翔,劉磊,方太勛,楊帆,鄭力
(南京南瑞繼保電氣有限公司,江蘇 南京 211102)
摘 要:換流閥運行時,閥電抗器僅在換流閥開通和關(guān)斷的暫態(tài)過程中承受電壓,且交替工作于不飽和、飽和兩種狀態(tài),因此無法直接引用傳統(tǒng)的鐵芯損耗計算公式進行鐵芯損耗計算,也就無法對閥電抗器的鐵芯設(shè)計進行校核?;阼F芯損耗發(fā)熱引起的溫升等效原則,在相同的電抗器進水溫度和相近的環(huán)境溫度下,分別設(shè)計了高頻和工頻工況下的鐵芯測溫試驗,根據(jù)工頻工況下測得的鐵芯溫升(對環(huán)溫),并利用高頻工況下試驗得到的鐵芯損耗和鐵芯溫升(對環(huán)溫)的關(guān)系曲線,得到工頻工況下的鐵芯損耗實際值,從而對閥電抗器鐵芯設(shè)計進行校核,確保在換流閥長期運行時不會閥電抗器出現(xiàn)異常發(fā)熱。
關(guān)鍵詞:換流閥;閥電抗器;鐵芯損耗;光纖測溫
中圖分類號:TM406 文獻標識碼:A 文章編號:1007-3175(2019)05-0049-04
Experimental Study on Iron Core Loss of Valve Reactor for HVDC Transmission
HUANG Hua, ZHANG Xiang, LIU Lei, FANG Tai-xun, YANG Fan, ZHENG Li
(NR Electric Co., Ltd, Nanjing 2111 02, China)
Abstract: The valve reactor only withstands the voltage in the transient process of valve opening and closing, and it alternatingly works in the unsaturated and saturated two states, so that the core loss calculation couldn’t directly quote the traditional core loss calculation formula and also could check the core design of the valve reactor. This paper designed the iron core temperature test under high frequency and power frequency conditions respectively based on the equivalent principle of temperature rise caused by iron core loss and heat, which was the same reactor inlet temperature and similar ambient temperature. According to the core temperature rise (on the temperature) measured under the power frequency conditions, the test under high frequency condition was utilized to get the relation curve of the iron core loss and the iron core temperature rise (for the ambient temperature) and the actual value of iron core loss under power frequency condition, so as to check the iron core design of valve reactor, and to ensure that the valve reactor does not appear abnormal heat when converter valve is in the long-term operation.
Key words: converter valve; valve reactor; iron core loss; fiber temperature measurement
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