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(shí)間：2018-09-05 10:54
【摘要】：地磁擾動(dòng)會(huì)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(chǎng)的作用下,高電壓等級(jí)輸電線路的GIC較大,準(zhǔn)確計(jì)算超高壓電網(wǎng)的GIC具有重要意義。以我國(guó)新疆2020年規(guī)劃電網(wǎng)為例,只考慮750k V電壓等級(jí),建立了電網(wǎng)的GIC計(jì)算模型,分析了均勻地電場(chǎng)作用下規(guī)劃電網(wǎng)中GIC的分布規(guī)律和方向敏感性,計(jì)算并分析了電網(wǎng)電阻參數(shù)對(duì)GIC的影響。利用2004年11月7日至8日的磁暴監(jiān)測(cè)數(shù)據(jù),評(píng)估了強(qiáng)磁暴作用下電網(wǎng)的GIC水平。計(jì)算結(jié)果表明,電網(wǎng)拓?fù)浣Y(jié)構(gòu)、感應(yīng)地電場(chǎng)方向及電網(wǎng)參數(shù)對(duì)線路及變電站GIC影響較大,在1V/km的均勻場(chǎng)作用下,且末、布爾津等變電站會(huì)出現(xiàn)超過(guò)200A的GIC,個(gè)別線路GIC超過(guò)300A。輸電線路電阻變化對(duì)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(chǎng)變化率具有時(shí)間一致性,與所選事件強(qiáng)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(guó)網(wǎng)新疆電力設(shè)計(jì)院;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016 YFC 0800100)~~
【分類號(hào)】：TM72
本文編號(hào)：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(guó)網(wǎng)新疆電力設(shè)計(jì)院;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016 YFC 0800100)~~
【分類號(hào)】：TM72
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