本文選題：振蕩中心 + 動(dòng)態(tài)遷移　； 參考：《電力系統(tǒng)自動(dòng)化》2014年20期

【摘要】：基于三機(jī)等值系統(tǒng),研究了多頻振蕩下失步振蕩中心的特性及其變化規(guī)律。在同一失穩(wěn)模式下,機(jī)組不同調(diào)導(dǎo)致振蕩中心向不同調(diào)側(cè)偏移,不同調(diào)越明顯,偏移量越大。多頻失步振蕩過(guò)程中,同一個(gè)時(shí)刻僅有一個(gè)斷面由于機(jī)組振蕩導(dǎo)致電壓為零,為系統(tǒng)失步振蕩中心。失步振蕩中心出現(xiàn)時(shí),所在線路兩側(cè)等值兩機(jī)系統(tǒng)功角擺開(kāi)180°。系統(tǒng)阻抗參數(shù)決定了系統(tǒng)振蕩中心最大遷移范圍,在確定阻抗參數(shù)情況下,三機(jī)系統(tǒng)功角變化趨勢(shì)決定了振蕩中心遷移方向。傳統(tǒng)基于就地信息的解列判據(jù)難以適應(yīng)多頻振蕩下的失步場(chǎng)景,通過(guò)線路兩側(cè)相位差擺開(kāi)180°的判據(jù),可準(zhǔn)確定位多頻振蕩下失步振蕩中心出現(xiàn)時(shí)刻及其位置。
[Abstract]:Based on the three-machine equivalent system, the characteristics and variation of out-of-step oscillation center under multi-frequency oscillation are studied. Under the same unstable mode, the oscillation center is shifted to different side adjustment due to different adjustment, and the more obvious the different modulation is, the bigger the migration is. In the process of multi-frequency out-of-step oscillation, only one section at the same time is the center of out-of-step oscillation because the voltage is zero due to unit oscillation. When the center of out-of-step oscillation appears, the power angle of the equivalent two-machine system on both sides of the line is tilted 180 擄. The maximum migration range of the oscillation center is determined by the system impedance parameters. When the impedance parameter is determined, the direction of the oscillation center migration is determined by the variation trend of the power angle of the three-machine system. The traditional decoupling criterion based on local information is difficult to adapt to the out-of-step scene under multi-frequency oscillation. By tilting 180 擄of phase difference on both sides of the line, the time and position of the center of out-of-step oscillation under multi-frequency oscillation can be accurately located.
【作者單位】： 國(guó)電南瑞科技股份有限公司;南京理工大學(xué)自動(dòng)化學(xué)院;武漢大學(xué)電氣工程學(xué)院;
【基金】：國(guó)家電網(wǎng)公司大電網(wǎng)重大專(zhuān)項(xiàng)資助項(xiàng)目(SGCC-MPLG003-2012)~~
【分類(lèi)號(hào)】：TM712

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本文編號(hào)：1895824