本文選題：振蕩中心 + 動(dòng)態(tài)遷移　； 參考：《電網(wǎng)技術(shù)》2014年01期

【摘要】：基于計(jì)及阻抗不均的等值兩機(jī)系統(tǒng)模型,采用向量圖和數(shù)值計(jì)算相結(jié)合方法研究了線路阻抗不均導(dǎo)致振蕩中心偏移的規(guī)律。定義兩機(jī)系統(tǒng)總阻抗模值的中點(diǎn)為系統(tǒng)中心。在系統(tǒng)功角由0?360?擺周期中,系統(tǒng)阻抗角不等可導(dǎo)致振蕩中心動(dòng)態(tài)遷移:當(dāng)系統(tǒng)中心落在聯(lián)絡(luò)線上時(shí),振蕩中心僅在聯(lián)絡(luò)線內(nèi)部動(dòng)態(tài)遷移。當(dāng)系統(tǒng)中心落在聯(lián)絡(luò)線任側(cè)系統(tǒng)等值阻抗上時(shí),存在兩種遷移規(guī)律,是僅在聯(lián)絡(luò)上動(dòng)態(tài)遷移,二是振蕩中心在聯(lián)絡(luò)線和系統(tǒng)中心所在的聯(lián)絡(luò)線側(cè)等值阻抗上動(dòng)態(tài)遷移。系統(tǒng)失步中心位置(振蕩周期內(nèi)電壓過零點(diǎn))不受阻抗不均的影響,不影響失步中心位置的定位,但失步中心并非只在系統(tǒng)功角擺至180?時(shí)出現(xiàn)。
[Abstract]:Based on the equivalent two-machine system model with unequal impedance, the law of oscillation center offset caused by line impedance imbalance is studied by using vector diagram and numerical calculation. The midpoint of the total impedance modulus of the two-machine system is defined as the center of the system. At the power angle of the system from 0 to 360? During the pendulum period, the dynamic migration of the oscillation center can be caused by the difference of impedance angle: when the center of the system falls on the tie-line, the oscillation center moves only within the tie-line. When the system center falls on the equivalent impedance of the tie-line system, there are two kinds of migration laws, that is, the dynamic migration of the oscillation center is only in connection, and the other is the dynamic migration of the oscillation center on the equivalent impedance of the tie-line and the tie-line side in which the system center is located. The position of the out-of-step center (voltage crossing point in the oscillation cycle) is not affected by the uneven impedance, and does not affect the location of the out-of-step center, but the out-of-step center is not only placed at the power angle of the system to 180? Appear when.
【作者單位】： 南京南瑞集團(tuán)公司(國(guó)網(wǎng)電力科學(xué)研究院);
【基金】：國(guó)家電網(wǎng)公司重大專項(xiàng)資助項(xiàng)目(S G C C-MPLG003-031-2012)~~
【分類號(hào)】：TM712

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本文編號(hào)：2014276