本文選題：失步振蕩中心遷移　切入點(diǎn)：多重嚴(yán)重故障　出處：《電網(wǎng)技術(shù)》2017年01期 　論文類型：期刊論文

【摘要】：為減小失步振蕩中心遷移對(duì)系統(tǒng)解列的影響,基于兩機(jī)系統(tǒng)失步振蕩中心遷移的一般規(guī)律,研究了高頻切機(jī)措施引起的等效電抗及等效電動(dòng)勢(shì)變化,得到了切機(jī)后失步振蕩中心遷移的函數(shù)表達(dá)式。同時(shí)提出了切機(jī)后失步振蕩中心遷移的臨界曲線和臨界區(qū)域,得到了高頻切機(jī)措施影響失步振蕩中心遷移的規(guī)律。結(jié)合實(shí)際電網(wǎng)發(fā)生多重嚴(yán)重故障的案例,在失步振蕩過程中,高頻切機(jī)措施會(huì)使失步振蕩中心朝被切電源一側(cè)遷移,在進(jìn)行高頻切機(jī)時(shí),應(yīng)盡快切除穩(wěn)定性較差機(jī)組,避免孤立系統(tǒng)出現(xiàn)二次失步現(xiàn)象,有利于孤立系統(tǒng)快速恢復(fù)穩(wěn)定。仿真算例對(duì)工程實(shí)踐中增加預(yù)想故障類型,考慮第三道防線措施相互配合,和布置解列裝置安裝點(diǎn)具有指導(dǎo)意義。
[Abstract]:In order to reduce the influence of out-of-step oscillation center migration on the system decoupling, the equivalent reactance and equivalent electromotive force (EMF) caused by high-frequency cutting machine are studied based on the general law of out-of-step oscillation center migration in two-machine system. The functional expression of the migration of the out-of-step oscillation center after the cutting machine is obtained, and the critical curve and the critical region of the migration of the out-of-step oscillation center after the cutting machine are presented. The rule that high-frequency cutting measures affect the migration of out-of-step oscillation center is obtained. Combined with the case of multiple serious faults in actual power network, the high-frequency cutting measures will make the out-of-step oscillation center move to the side of the cut power supply in the process of out-of-step oscillation. In the process of high frequency cutting machine, the unit with poor stability should be removed as soon as possible, and the secondary out-of-step phenomenon of isolated system should be avoided, which is beneficial to the rapid restoration of stability of isolated system. It is of guiding significance to consider the coordination of the third line of defense and the arrangement of mounting points of the dismounting device.
【作者單位】： 華北電力大學(xué)電氣與電子工程學(xué)院;中國(guó)電力科學(xué)研究院;西北電力調(diào)度信息中心;國(guó)網(wǎng)山西省電力公司朔州供電公司;
【基金】：國(guó)家電網(wǎng)公司總部科技項(xiàng)目“川藏聯(lián)網(wǎng)及西北弱交流系統(tǒng)安全穩(wěn)定特性及控制技術(shù)研究”~~
【分類號(hào)】：TM712

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