本文選題：特高壓交流變電站　切入點：直流偏磁　出處：《電網(wǎng)技術》2014年01期 　論文類型：期刊論文

【摘要】：研究了上海周邊7條超高壓與特高壓直流系統(tǒng)中有條或多條線路單極運行時,上海滬西等特高壓變電站和上海500 kV電網(wǎng)的直流偏磁情況。電磁仿真計算各交流變電站的地電位分布與中性點偏磁電流,結果表明:多條直流線路單極運行時條線路上的電流不會通過其他線路回流,特高壓變電站的直流電流在多條線路同時單極運行時的數(shù)值等于單條線路單極運行時的代數(shù)和,向家壩—上海、錦屏—蘇南、三峽—上海這3條線路單極運行時對滬西變電站的影響大,使特高壓變壓器中性點偏磁電流超過5 A,約2.4?的變壓器中性點串聯(lián)電阻可較好地抑制滬西特高壓變電站的直流偏磁電流。
[Abstract]:In this paper, the unipolar operation of seven UHV and UHV DC systems around Shanghai is studied. The DC magnetic bias of UHV substations and 500 kV power grids in Shanghai, Shanghai, Shanghai, and so on. Electromagnetic simulation is used to calculate the ground potential distribution and neutral bias current of each AC substation. The results show that the current on multiple DC lines is not reflux through other lines when unipolar operation, and the value of DC current in UHV substation is equal to the algebraic sum when unipolar operation of single line is achieved at the same time. Xiangjiaba-Shanghai, Jinping-Sunan, three Gorges-Shanghai-the three Gorges-Shanghai single pole operation of the three lines on the Huxi substation, so that the UHV transformer neutral point bias magnetic current more than 5 A, about 2.4? The transformer neutral point series resistance can restrain DC bias current of UHV substation.
【作者單位】： 電力傳輸與功率變換控制教育部重點實驗室(上海交通大學);上海市電力公司上海電力科學研究院;
【基金】：國家電網(wǎng)公司皖電東送工程單項研究專題—超、特高壓直流輸電系統(tǒng)的運行對特高壓交流系統(tǒng)的影響研究~~
【分類號】：TM862;TM63

【參考文獻】

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本文編號：1635886