發(fā)布時(shí)間：2018-06-04 03:55

  本文選題：并聯(lián)電抗器 + 三相跳閘��； 參考：《電力自動(dòng)化設(shè)備》2017年05期

【摘要】：利用瞬時(shí)性和永久性故障時(shí)故障端口的邊界條件,由相模變換得到了時(shí)域和復(fù)頻域的復(fù)合模網(wǎng)絡(luò),進(jìn)而分析得到了并聯(lián)電抗器模電流中的低頻振蕩頻率。理論分析及仿真表明:在兩側(cè)全跳閘之前,并聯(lián)電抗器模電流中存在工頻分量;兩側(cè)均跳閘后,工頻分量消失。此后,若該故障為永久性,并聯(lián)電抗器模電流的振蕩頻率與故障類型有關(guān),可能不存在低頻成分,或者含有1種甚至2種低頻成分;若該故障為瞬時(shí)性且故障點(diǎn)已熄弧,并聯(lián)電抗器各模電流僅含1種低頻成分;不同故障性質(zhì)下的振蕩頻率基本不受故障位置和過渡電阻的影響。該分析結(jié)果可用于構(gòu)造基于并聯(lián)電抗器模電流頻率特性的三相重合閘故障性質(zhì)識(shí)別判據(jù)。
[Abstract]:By using the boundary conditions of fault ports in transient and permanent faults, the complex mode networks in time domain and complex frequency domain are obtained by phase mode transformation, and the low frequency oscillation frequency in mode current of parallel reactor is analyzed. Theoretical analysis and simulation show that there are power frequency components in the mode current of the parallel reactor before the full tripping on both sides and the power frequency component disappears after both sides tripping. Thereafter, if the fault is permanent, the oscillation frequency of the mode current of the parallel reactor is related to the type of fault, and there may be no low-frequency component, or one or two low-frequency components; if the fault is transient and the fault point is extinguished, Each mode current of parallel reactor contains only one kind of low frequency component, and the oscillation frequency under different fault properties is not affected by fault location and transition resistance. The results can be used to construct the fault identification criterion of three-phase reclosing based on the mode current frequency characteristics of parallel reactor.
【作者單位】： 西安交通大學(xué)電氣工程學(xué)院;許繼集團(tuán)有限公司;
【基金】：國家電網(wǎng)公司科技項(xiàng)目(SGTYHT/14-JS-188)~~
【分類號(hào)】：TM75

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本文編號(hào)：1975783