【摘要】：相同感應(yīng)地電場(chǎng)作用下,不同電壓等級(jí)輸電線路的地磁感應(yīng)電流(geomagnetically induced currents,GIC)大小不同,以往的GIC計(jì)算集中在電網(wǎng)最高電壓等級(jí)線路,通常忽略其他電壓等級(jí)線路的GIC。交流特高壓電網(wǎng)建設(shè)使我國(guó)電網(wǎng)增加了1 000 kV電壓等級(jí),綜合考慮線路長(zhǎng)度、單位阻值等GIC影響因素,準(zhǔn)確計(jì)算包括500 kV超高壓及1 000 kV特高壓的多電壓等級(jí)電網(wǎng)的GIC是重要研究課題。以我國(guó)多電壓等級(jí)電網(wǎng)(三華電網(wǎng))為例,分別考慮1 000 kV單電壓等級(jí)網(wǎng)絡(luò)(稱電網(wǎng)1)和500、1 000 kV雙電壓等級(jí)網(wǎng)絡(luò)(稱電網(wǎng)2),建立了電網(wǎng)1及電網(wǎng)2的全節(jié)點(diǎn)GIC模型并提出了多電壓等級(jí)電網(wǎng)的GIC算法,計(jì)算了兩種感應(yīng)地電場(chǎng)情況下電網(wǎng)1及電網(wǎng)2的GIC,比較了兩種情況下電網(wǎng)1及電網(wǎng)2的GIC計(jì)算結(jié)果。計(jì)算結(jié)果表明,500 kV超高壓電網(wǎng)的GIC對(duì)1 000 kV特高壓變電站的GIC水平有較大的影響,在多電壓等級(jí)電網(wǎng)的GIC計(jì)算中,不能只計(jì)算最高電壓等級(jí)電網(wǎng)的GIC,而忽略次級(jí)高壓電網(wǎng)GIC的影響。
[Abstract]:Under the same inductive geoelectric field, the magnitude of geomagnetic induced current (geomagnetically induced) of transmission lines with different voltage levels is different. In the past, the calculation of GIC was concentrated on the highest voltage level lines of the power network, and the GICs of other voltage-level lines were usually ignored. The construction of AC UHV power network has increased the voltage grade of 1 000 kV in China's power network, considering the GIC influence factors such as line length, unit resistance and so on. It is an important research topic to calculate accurately the GIC of multi-voltage power network including 500kV UHV and 1000 kV UHV. Take our country's multi-voltage power grid (Sanhua Power Network) as an example, Considering 1 000 kV single voltage grade network (1) and 500 1 000 kV double voltage level network (2) respectively, the full-node GIC model of power network 1 and 2 is established, and the GIC algorithm of multi-voltage grade network is proposed. The GICs of power grid 1 and grid 2 under two kinds of induced geoelectric field are calculated, and the GIC results of grid 1 and power grid 2 are compared. The calculation results show that the GIC of 500kV UHV network has a great influence on the GIC level of 1 000 kV UHV substation, and in the GIC calculation of multi-voltage grade power network, We can't only calculate the GICs of the highest voltage level grid, but ignore the influence of the GIC of the secondary high voltage power network.
【作者單位】： 新能源電力系統(tǒng)國(guó)家重點(diǎn)實(shí)驗(yàn)室(華北電力大學(xué));
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51177045) 國(guó)家863高技術(shù)基金項(xiàng)目(2012AA121005) 國(guó)家科技部國(guó)際合作計(jì)劃項(xiàng)目(2010DFA64680)~~
【分類號(hào)】：TM744

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本文編號(hào)：2149461