地磁感應(yīng)電流對(duì)變壓器影響的仿真研究 

易成星，楊偉 
(南京理工大學(xué) 自動(dòng)化學(xué)院，江蘇 南京 210094) 
 

摘 要： 太陽(yáng)風(fēng)引發(fā)地磁暴時(shí)會(huì)在電網(wǎng)中產(chǎn)生地磁感應(yīng)電流(Geomagnetically Induced Currents，GIC)，準(zhǔn)直流特性的GIC 會(huì)導(dǎo)致變壓器產(chǎn)生直流偏磁。闡述了GIC 的產(chǎn)生原理，根據(jù)零序磁通的磁路情況分析了不同鐵芯結(jié)構(gòu)變壓器受GIC 影響的大小程度?；贛ATLAB-SIMULINK 仿真軟件建立了三相三柱式變壓器和三相組式變壓器的直流偏磁模型，通過(guò)對(duì)比兩種變壓器在GIC 作用下的勵(lì)磁電流、磁鏈和諧波階次來(lái)對(duì)比分析不同鐵芯結(jié)構(gòu)受GIC 影響的程度。仿真結(jié)果表明，零序磁通回路磁阻小的鐵芯結(jié)構(gòu)變壓器更易受到GIC 的影響，產(chǎn)生明顯的直流偏磁，勵(lì)磁電流含有各階次諧波，對(duì)電網(wǎng)的安全穩(wěn)定運(yùn)行帶來(lái)一定的影響。
關(guān)鍵詞： 地磁感應(yīng)電流；太陽(yáng)風(fēng)；鐵芯結(jié)構(gòu)；變壓器；直流偏磁；諧波
中圖分類號(hào)：TM411+.2 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2015)01-0016-05

Simulation Study About the Influence of Geomagnetically Induced Currents on Transformer 

YI Cheng-xing, YANG Wei 
（School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China） 
 

Abstract: Geomagnetic storms triggered by solar wind can cause geomagnetically induced currents（GIC）in power grid, and GIC with quasi-direct current will make transformer produce DC biasing magnetism. Description was made to generation principle of GIC, and analysis was made to the extent of the impact of GIC on transformer with different core structure according to magnetic circuit of zero sequence flux. The models of three-limb core form transformer and three single-phase cores with DC flux shift were built in simulink of Matlab. By the comparison of excitation current, flux linkage and harmonic orders of the two different transformers under the influence of GIC, the results show that the transformer with low reluctance of zero sequence flux is vulnerable to GIC. In this case, GIC causes apparent DC flux shift and excitation current has each order harmonic, which poses a threat to the safe and stable operation of the power grid.
Key words: geomagnetically induced currents; solar wind; iron core structure; transformer; DC biasing magnetism; harmonic

參考文獻(xiàn)
[1] 高玉芬. 強(qiáng)烈地磁擾動(dòng)的危害[J]. 國(guó)際地震動(dòng)態(tài)，2005(11)：6-9.
[2] 王開(kāi)讓，林雋，劉連光，等.由對(duì)地全暈狀日冕物質(zhì)拋射誘發(fā)的地磁感應(yīng)電流統(tǒng)計(jì)研究[J].天文學(xué)報(bào)，2012，53(1)：9-27. [3] 張燕秉，劉連光，張清明，等. 基于PSCAD/EMTDC的電網(wǎng)GIC 影響仿真分析[J]. 華北電力技術(shù)，2004(6)：10-13.
[4] 張冰，劉連光，肖湘寧.地磁感應(yīng)電流對(duì)變壓器振動(dòng)、噪聲的影響[J].高電壓技術(shù)，2009，35(4)：900-904.
[5] 劉連光，劉春明，張冰.磁暴對(duì)我國(guó)特高壓電網(wǎng)的影響研究[J].電網(wǎng)技術(shù)，2009，33(11)：1-5.
[6] 鄒明.電網(wǎng)GIC水平評(píng)估軟件的設(shè)計(jì)與開(kāi)發(fā)[D].北京：華北電力大學(xué)，2011．
[7] 董霞. 變壓器直流偏磁研究[D]. 濟(jì)南：山東大學(xué)，2013.
[8] 程建.基于PSCAD軟件的阻抗匹配平衡變壓器仿真研究[J].電工電氣，2011(1)：13-16.
[9] 鄭濤，陳佩璐，毛安瀾，等.地磁感應(yīng)電流作用下的CT飽和特性及其引起的變壓器差動(dòng)保護(hù)誤動(dòng)[J].電網(wǎng)技術(shù)，2014，38(2)：520-525.
[10] 薛向黨，尤一鳴. 地磁感應(yīng)電流對(duì)電力變壓器危害的研究[J]. 電力系統(tǒng)及其自動(dòng)化學(xué)報(bào)，1999，11(2)：13-19.
[11] 馬曉冰，Ian J Ferguson，孔祥儒，等. 地磁感應(yīng)電流(GIC)的作用與評(píng)估[J]. 地球物理學(xué)報(bào)，2006，48(6)：1282-1287.
[12] Price P R.Geomagnetically induced current effects on transformers[J].IEEE Transactions on Power Delivery, 2002, 17(4)：1002-1008.
[13] Marti L, Rezaei-Zare A, Narang A.Simulation of transformer hotspot heating due to geomagnetically induced currents[J].IEEE Transactions on Power Delivery, 2013, 28(1)：320-327.