本文選題：直流輸電　切入點(diǎn)：高壓直流輸電　出處：《上海交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著大交流系統(tǒng)間區(qū)域互聯(lián)的進(jìn)一步發(fā)展,遠(yuǎn)距離大容量輸電的需求逐漸增長。交流輸電系統(tǒng)存在非同步穩(wěn)定問題的缺陷,而采用電流源型換流器的高壓直流輸電技術(shù)是一種輸送功率大、能夠遠(yuǎn)距離實(shí)現(xiàn)系統(tǒng)互聯(lián)的優(yōu)秀輸電方式,因此其受到了越來越多的關(guān)注。直流輸電線路保護(hù)是高壓直流輸電工程控制保護(hù)系統(tǒng)的重要組成部分。為了進(jìn)一步地提高直流線路保護(hù)可靠性和速動(dòng)性等動(dòng)作性能,需要對其故障暫態(tài)做更詳盡地分析,并考慮直流故障、交流故障、雷擊以及換相失敗等因素對直流線路故障暫態(tài)的影響。本文研究緊緊地圍繞高壓直流輸電線路的故障暫態(tài)特性分析,內(nèi)容如下:(1)直流輸電系統(tǒng)的模型研究。給出交流系統(tǒng)、換流站設(shè)備、控制系統(tǒng)、直流輸電線路以及雷擊的建模方法,從工程實(shí)用角度完善直流系統(tǒng)的電磁暫態(tài)模型。(2)探討直流輸電線路故障時(shí)的暫態(tài)特性。探索影響直流輸電線路故障暫態(tài)特性的因素,研究雷擊直流線路、交流系統(tǒng)故障兩種故障情況下直流系統(tǒng)的電磁暫態(tài)特征,為繼電保護(hù)運(yùn)行提供技術(shù)支持。(3)探索直流輸電線路在換相失敗時(shí)的暫態(tài)特性。對換相失敗進(jìn)行詳細(xì)的電磁暫態(tài)仿真,分析發(fā)生換相失敗時(shí)高壓直流輸電線路的電磁暫態(tài)特性。最后對論文作了總結(jié),指出進(jìn)一步研究的方向。
[Abstract]:With the further development of regional interconnection among large AC systems, the demand for long distance and large capacity transmission is increasing gradually. The HVDC transmission technology with current source converter is an excellent transmission mode which can transmit large power and realize the interconnection of the system at a long distance. As a result, more and more attention has been paid to it. HVDC line protection is an important part of HVDC project control protection system. In order to further improve the operational performance of HVDC line protection, such as reliability and rapidity, etc. Need to do a more detailed analysis of its fault transient, and consider DC fault, AC fault, The effect of lightning stroke and commutation failure on the fault transient of HVDC transmission line is studied in this paper. The transient characteristics of HVDC transmission line are analyzed closely. The main contents are as follows: 1) the model of HVDC transmission system. The AC system is given. Modeling method of converter station equipment, control system, DC transmission line and lightning stroke, From the angle of engineering application, the electromagnetic transient model of DC system is improved. The transient characteristics of DC transmission line are discussed. The factors influencing the transient characteristics of DC transmission line are explored, and the lightning strike DC line is studied. The electromagnetic transient characteristics of DC system under two kinds of faults of AC system, which provide technical support for relay protection operation. (3) explore the transient characteristics of DC transmission line when commutation failure. The electromagnetic transient simulation of commutation failure is carried out in detail. The electromagnetic transient characteristics of HVDC transmission lines in the event of commutation failure are analyzed. Finally, the paper is summarized and the direction of further research is pointed out.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM75

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本文編號(hào)：1585311