新疆2020年規(guī)劃電網(wǎng)地磁感應(yīng)電流的分布規(guī)律及敏感性分析
發(fā)布時間：2018-09-05 10:54
【摘要】：地磁擾動會在高壓電網(wǎng)中誘發(fā)地磁感應(yīng)電流(geomagnetically induced currents,GIC)。在相同感應(yīng)地電場的作用下,高電壓等級輸電線路的GIC較大,準(zhǔn)確計算超高壓電網(wǎng)的GIC具有重要意義。以我國新疆2020年規(guī)劃電網(wǎng)為例,只考慮750k V電壓等級,建立了電網(wǎng)的GIC計算模型,分析了均勻地電場作用下規(guī)劃電網(wǎng)中GIC的分布規(guī)律和方向敏感性,計算并分析了電網(wǎng)電阻參數(shù)對GIC的影響。利用2004年11月7日至8日的磁暴監(jiān)測數(shù)據(jù),評估了強磁暴作用下電網(wǎng)的GIC水平。計算結(jié)果表明,電網(wǎng)拓?fù)浣Y(jié)構(gòu)、感應(yīng)地電場方向及電網(wǎng)參數(shù)對線路及變電站GIC影響較大,在1V/km的均勻場作用下,且末、布爾津等變電站會出現(xiàn)超過200A的GIC,個別線路GIC超過300A。輸電線路電阻變化對GIC影響程度遠(yuǎn)大于變壓器繞組電阻和接地電阻的影響程度。GIC與磁暴期間磁場變化率具有時間一致性,與所選事件強度相當(dāng)?shù)拇疟┳饔孟?變電站和線路GIC最高可達(dá)96A和184A。
[Abstract]:Geomagnetic disturbances can induce geomagnetic induced currents (geomagnetically induced currents,GIC) in high voltage power grids. Under the same inductive geoelectric field, the GIC of transmission lines with high voltage level is larger, so it is of great significance to calculate the GIC of EHV power grid accurately. Taking the planning power grid of Xinjiang in 2020 as an example, considering only 750 kV voltage level, the GIC calculation model of the power network is established, and the distribution law and direction sensitivity of GIC in the planning power network under the action of uniform geoelectric field are analyzed. The influence of grid resistance parameters on GIC is calculated and analyzed. Based on the geomagnetic storm monitoring data from November 7 to 8, 2004, the GIC level of power grid under the action of strong magnetic storm is evaluated. The results show that the topology, the direction of induced geoelectric field and the network parameters have great influence on the GIC of the lines and substations. Under the action of the uniform field of 1V/km, at the same time, some GIC, lines with GIC exceeding 300A will appear in the Bojin substations. The influence of transmission line resistance on GIC is much greater than that of transformer winding resistance and grounding resistance. Substation and line GIC up to 96A and 184A.
【作者單位】： 西安科技大學(xué)電氣與控制工程學(xué)院;國網(wǎng)新疆電力設(shè)計院;
【基金】：國家重點研發(fā)計劃項目(2016 YFC 0800100)~~
【分類號】：TM72
本文編號：2224052
[Abstract]:Geomagnetic disturbances can induce geomagnetic induced currents (geomagnetically induced currents,GIC) in high voltage power grids. Under the same inductive geoelectric field, the GIC of transmission lines with high voltage level is larger, so it is of great significance to calculate the GIC of EHV power grid accurately. Taking the planning power grid of Xinjiang in 2020 as an example, considering only 750 kV voltage level, the GIC calculation model of the power network is established, and the distribution law and direction sensitivity of GIC in the planning power network under the action of uniform geoelectric field are analyzed. The influence of grid resistance parameters on GIC is calculated and analyzed. Based on the geomagnetic storm monitoring data from November 7 to 8, 2004, the GIC level of power grid under the action of strong magnetic storm is evaluated. The results show that the topology, the direction of induced geoelectric field and the network parameters have great influence on the GIC of the lines and substations. Under the action of the uniform field of 1V/km, at the same time, some GIC, lines with GIC exceeding 300A will appear in the Bojin substations. The influence of transmission line resistance on GIC is much greater than that of transformer winding resistance and grounding resistance. Substation and line GIC up to 96A and 184A.
【作者單位】： 西安科技大學(xué)電氣與控制工程學(xué)院;國網(wǎng)新疆電力設(shè)計院;
【基金】：國家重點研發(fā)計劃項目(2016 YFC 0800100)~~
【分類號】：TM72
【相似文獻(xiàn)】
相關(guān)期刊論文 前1條
1 王竹南;;解析煤礦瓦斯發(fā)電廠并網(wǎng)對電網(wǎng)的影響[J];科技與企業(yè);2014年05期
，本文編號：2224052
本文鏈接：http://sikaile.net/kejilunwen/dianlidianqilunwen/2224052.html
最近更新
教材專著
