【摘要】：干式空心并聯(lián)電抗器能起到提高遠(yuǎn)距離輸電線路傳輸能力,改善沿線電壓分布和減小系統(tǒng)過電壓等作用,在電力系統(tǒng)中占有重要的地位。近些年干式空心并聯(lián)電抗器經(jīng)常燒毀,相關(guān)研究表明,投切過電壓是主要原因之一,這種過電壓主要是一種在交流電壓的峰值處疊加脈沖振蕩的電壓波形,為了研究這種過電壓對(duì)干式空心并聯(lián)電抗器匝間絕緣的破壞性,首先需要研制出一套產(chǎn)生這種特殊過電壓波形的試驗(yàn)設(shè)備。本文應(yīng)用理論分析和仿真驗(yàn)證的方法對(duì)投切過程中出現(xiàn)的截流過電壓和復(fù)燃過電壓進(jìn)行了分析,給出了具體的電壓波形;為了模擬實(shí)際電抗器匝間絕緣,制作了干式空心并聯(lián)電抗器匝間絕緣試樣模型,通過試驗(yàn)研究分別確定了試樣在交流電壓和脈沖振蕩電壓下的擊穿電壓水平;以電路理論為基礎(chǔ),提出了一種并聯(lián)疊加電路和一種串聯(lián)疊加電路,分別對(duì)電路原理進(jìn)行了數(shù)學(xué)分析與仿真驗(yàn)證,確定了電路的具體參數(shù)。為了使脈沖振蕩電壓在交流電壓的峰值處疊加和球隙一秒鐘放電兩次,本文還設(shè)計(jì)了一套球隙放電控制電路,并用Altium Designer仿真軟件布線,將其制作成PCB電路板,通過試驗(yàn)驗(yàn)證了其可行性。在此基礎(chǔ)上,設(shè)計(jì)相關(guān)高壓部件和設(shè)備整體控制系統(tǒng),組建了一套高壓試驗(yàn)設(shè)備,用示波器觀察其產(chǎn)生的電壓波形。研究結(jié)果表明,截流過電壓是一種脈沖振蕩電壓波形,復(fù)燃過電壓是一種在交流電壓的峰值處疊加脈沖振蕩電壓波形;在交流電壓和脈沖振蕩電壓下干式空心并聯(lián)電抗器匝間絕緣試樣的擊穿電壓水平均為30k V;串聯(lián)疊加電路產(chǎn)生的疊加電壓波形與投切過電壓更接近,交流電壓和脈沖振蕩電壓也便于調(diào)節(jié);通過試驗(yàn)發(fā)現(xiàn)脈沖振蕩電壓在交流電壓的峰值附近實(shí)現(xiàn)了疊加,交流電壓和脈沖振蕩電壓都能在0~30k V范圍內(nèi)連續(xù)調(diào)節(jié),球隙一秒鐘放電兩次。最終證實(shí)本文提出的交流疊加脈沖振蕩電壓產(chǎn)生方法可行,該疊加設(shè)備可為后續(xù)干式空心并聯(lián)電抗器匝間絕緣擊穿試驗(yàn)研究打下基礎(chǔ)。
[Abstract]:The dry-type hollow parallel reactor plays an important role in the power system because it can improve the transmission capacity of long-distance transmission lines, improve the voltage distribution along the line and reduce the system overvoltage. In recent years, dry hollow shunt reactors often burn down. Related studies show that switching overvoltage is one of the main reasons, and this overvoltage is mainly a voltage waveform superimposing pulse oscillation at the peak of AC voltage. In order to study the damage of the overvoltage to the inter-turn insulation of the dry hollow parallel reactor, a set of test equipment to produce this special overvoltage waveform should be developed. In this paper, the method of theoretical analysis and simulation verification is used to analyze the overvoltage and reburning overvoltage in the switching process, and the specific voltage waveforms are given. In order to simulate the actual interturn insulation of reactor, a sample model of interturn insulation of dry hollow parallel reactor is made, and the breakdown voltage level of the sample under AC voltage and pulse oscillation voltage is determined by experimental study. Based on the circuit theory, a parallel superposition circuit and a series superposition circuit are proposed. The principle of the circuit is analyzed and verified by simulation, and the specific parameters of the circuit are determined. In order to stack the pulse oscillation voltage at the peak value of the AC voltage and discharge the spherical gap twice in one second, this paper also designs a control circuit of the ball-gap discharge. The circuit is wired by Altium Designer simulation software, and the circuit board is made into a PCB circuit board. The feasibility is verified by experiments. On this basis, the whole control system of related high voltage components and equipment is designed, and a set of high voltage test equipment is constructed. The voltage waveform generated by it is observed by oscilloscope. The results show that the cut-off overvoltage is a pulse oscillation voltage waveform, and the reburning overvoltage is a superimposed pulse oscillation voltage waveform at the peak value of the AC voltage. The breakdown voltage level of the interturn insulation sample of dry hollow parallel reactor is 30 kV under AC voltage and pulse oscillation voltage. The superposition voltage waveform generated by the series superposition circuit is closer to the switching overvoltage, and the AC voltage and the pulse oscillation voltage are also easy to adjust. It is found that the pulse oscillation voltage can be superimposed near the peak value of the AC voltage, the AC voltage and the pulse oscillation voltage can be adjusted continuously in the range of 0 ~ 30 kV, and the spherical gap is discharged twice a second. Finally, it is proved that the method proposed in this paper is feasible for the generation of AC superposition pulse oscillation voltage, and this superposition device can lay a foundation for the subsequent test study of inter-turn insulation breakdown of dry-type parallel reactor.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM83

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 盧翠珍;;基于多諧振蕩電路周期計(jì)算的分析[J];中國(guó)科技信息;2016年06期

2 高自偉;朱學(xué)成;張健;趙淼;楊飛;王永紅;;干式空心并聯(lián)電抗器切斷過電壓組合式保護(hù)[J];哈爾濱理工大學(xué)學(xué)報(bào);2015年04期

3 王華璽;葛少杰;董萬(wàn)光;侯憲法;;一起35 kV干式空心電抗器故障分析[J];電力電容器與無(wú)功補(bǔ)償;2014年05期

4 駱曉龍;張良;王永紅;聶洪巖;彭翔;陳偉;魏新勞;;干式空心電抗器匝間絕緣試驗(yàn)方法有效性分析[J];哈爾濱理工大學(xué)學(xué)報(bào);2014年01期

5 韓旭;段曉波;賈萌;張福民;周文;;補(bǔ)償電容器和串聯(lián)電抗器的故障分析及整改措施[J];電力電容器與無(wú)功補(bǔ)償;2013年05期

6 安韻竹;文習(xí)山;張婷婷;馬奎;王羽;陳小月;;SF_6斷路器預(yù)擊穿引起并聯(lián)電抗器合閘過電壓的原因及防護(hù)措施[J];高電壓技術(shù);2013年01期

7 徐林峰;林一峰;王永紅;魏新勞;陳慶國(guó);;干式空心電抗器匝間過電壓試驗(yàn)技術(shù)研究[J];高壓電器;2012年07期

8 江少成;戴瑞海;夏曉波;陳榮柱;季凌武;林琳;林堅(jiān);陳謝杰;張海龍;馬明;;干式空心電抗器匝間絕緣檢測(cè)原理及試驗(yàn)分析[J];高壓電器;2011年06期

9 趙紅玉;張曦;弋東方;弋戈;鄔楠;;引起電抗器故障的操作過電壓原因分析及解決方案[J];供用電;2010年04期

10 趙淑英;;高壓電網(wǎng)中并聯(lián)電抗器的應(yīng)用[J];云南電力技術(shù);2010年03期

相關(guān)碩士學(xué)位論文 前1條

1 宋喜平;脈沖振蕩電壓下電抗器匝間絕緣擊穿特性[D];哈爾濱理工大學(xué);2016年

，

本文編號(hào)：2386049