本文選題：換相失敗及恢復(fù)過程 + 送受端系統(tǒng)��； 參考：《高電壓技術(shù)》2017年07期

【摘要】：直流換相失敗過程中與送受端系統(tǒng)交換的無功功率大幅變化,表現(xiàn)為對(duì)系統(tǒng)不利的"無功沖擊負(fù)荷"特性,亟需對(duì)直流換相失敗過程中的送受端暫態(tài)無功特性開展深入研究。為此,首先給出了直流穩(wěn)態(tài)運(yùn)行和暫態(tài)過程中的送受端無功方程,然后分別分析了換相失敗期間和恢復(fù)過程中直流送端和受端的暫態(tài)無功特性,最后在此基礎(chǔ)上研究了直流控制系統(tǒng)參數(shù)對(duì)暫態(tài)無功特性的影響,并通過直流等值系統(tǒng)算例進(jìn)行了驗(yàn)證。研究結(jié)果表明,換相失敗期間,直流從受端系統(tǒng)吸收一定的無功功率,同時(shí)對(duì)送端系統(tǒng)先吸收大量的無功功率、再發(fā)出大量的無功功率;換相失敗恢復(fù)過程中,直流對(duì)受端系統(tǒng)通常先發(fā)出大量的無功功率、再吸收一定的無功功率,同時(shí)從送端系統(tǒng)吸收一定的無功功率。通過優(yōu)化直流低壓限流環(huán)節(jié)、換相失敗預(yù)測(cè)、電流控制器等重要控制參數(shù),可以減小換相失敗過程中直流與送受端系統(tǒng)交換的最大無功功率。
[Abstract]:During the process of DC commutation failure, the exchange of reactive power between DC commutation failure and receiving terminal system is greatly changed, which is unfavorable to the system. It is urgent to study the transient reactive power characteristics of the receiving terminal in the process of DC commutation failure. For this reason, the reactive power equations of the receiving end in the steady operation and transient process of DC are given, and the transient reactive power characteristics of the DC terminal and the receiver during the commutation failure and recovery are analyzed, respectively. Finally, the influence of DC control system parameters on transient reactive power characteristics is studied and verified by an example of DC equivalent system. The results show that during commutation failure, DC absorbs a certain amount of reactive power from the receiving system, at the same time, it absorbs a large amount of reactive power first and then emits a large amount of reactive power. The DC / receiver system usually emits a large amount of reactive power first, then absorbs a certain amount of reactive power, and at the same time absorbs a certain amount of reactive power from the terminal system. By optimizing the low voltage DC current limiting link, commutation failure prediction, current controller and other important control parameters, the maximum reactive power exchange between DC and receiving terminal system can be reduced in the process of commutation failure.
【作者單位】： 中國電力科學(xué)研究院;
【基金】：國家電網(wǎng)公司科技項(xiàng)目(XT71 16 046) 國家重點(diǎn)研發(fā)計(jì)劃(2016YFB0900805)~~
【分類號(hào)】：TM721.1

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本文編號(hào)：2053402