本文選題：電暈電流脈沖　切入點：時域特性　出處：《華北電力大學(xué)(北京)》2017年博士論文

【摘要】：高壓交流及直流輸電線路同走廊架設(shè)是一種節(jié)約土地資源、提高走廊輸電容量的有效方法。隨之而來的是新的電磁環(huán)境問題,其中很重要的一方面是由輸電線路電暈放電產(chǎn)生的無線電干擾問題。論文針對該新型輸電方式下的無線電干擾的源頭,即電暈電流脈沖,研究了鄰近交直流導(dǎo)線影響下的電暈電流脈沖時域特性。圍繞電暈電流脈沖時域特性,同時對電暈電流脈沖的測量方法、無線電干擾接收機(jī)的準(zhǔn)峰值響應(yīng)特性、電暈電流脈沖與地面離子流波形的關(guān)系等方面開展了相關(guān)的研究。本文的研究成果可以為交直流并行線路下的無線電干擾預(yù)測和分析提供有益的參考。首先,對比研究了兩種低電位下的電暈電流脈沖測量方法。基于室內(nèi)小型電暈籠,分別從試驗導(dǎo)線側(cè)以及籠體側(cè)測量獲得了相應(yīng)的電暈電流脈沖波形。對兩種測量方式下的電暈電流脈沖波形進(jìn)行了對比,并獲得了匹配電阻對電暈電流脈沖波形的影響規(guī)律。針對兩種測量方法下的電暈電流脈沖傳播過程分別建立了電路模型和傳輸線模型,并驗證了模型的有效性�；诮⒌哪Ｐ蛯煞N測量方法進(jìn)行了系統(tǒng)的對比和分析,明確了兩種測量方法之間的關(guān)聯(lián)關(guān)系。其次,基于搭建的電暈籠實驗平臺,對交直流并行導(dǎo)線下的正負(fù)極性直流電暈電流脈沖以及交流電暈電流脈沖的時域特性進(jìn)行了系統(tǒng)地研究。分別對電暈電流脈沖的分布模式、波形參數(shù)、重復(fù)頻率、起始特性、二次脈沖的時間間隔、脈沖峰值的分布以及其它效應(yīng)進(jìn)行了分析,獲得了交直流并行導(dǎo)線下的電暈電流脈沖時域特性。同時基于電暈放電的離子云模型,分析和推導(dǎo)了鄰近的交流導(dǎo)線對負(fù)極性電暈電流脈沖時間間隔的調(diào)制效應(yīng)。最后,鑒于本文試驗中觀測到的交直流導(dǎo)線并行時會明顯影響電暈電流脈沖分布模式與重復(fù)頻率的現(xiàn)象,建立了準(zhǔn)峰值檢波模式下的EMI接收機(jī)數(shù)值模型,分析了電暈電流脈沖分布模式、峰值、重復(fù)頻率等參數(shù)的變化對接收機(jī)準(zhǔn)峰值檢波結(jié)果的影響規(guī)律。與此同時,為了建立電暈電流脈沖與地面離子流之間的關(guān)系,開展了線板電極下電暈電流脈沖與離子流時域波形的同步測量試驗,發(fā)現(xiàn)了電暈電流脈沖與地面離子流波形之間的關(guān)聯(lián)關(guān)系,并提出了一種基于電暈電流脈沖計算地面離子流的方法。
[Abstract]:The erection of HVAC and HVDC transmission lines with the same corridor is an effective method to save land resources and increase the transmission capacity of the corridor. One of the most important aspects is the radio interference caused by corona discharge of transmission lines. In this paper, the source of the radio interference under the new transmission mode, namely, the corona current pulse, is discussed. The time domain characteristics of corona current pulses under the influence of adjacent AC / DC conductors are studied. The time domain characteristics of corona current pulses, the measurement method of corona current pulses and the quasi-peak response characteristics of radio interference receivers are also studied. The relationship between corona current pulse and surface ion current waveform has been studied. The research results in this paper can provide a useful reference for the prediction and analysis of radio interference in AC / DC parallel lines. Two methods for measuring corona current pulse at low potential are compared. The corona current pulse waveforms are obtained from the test conductor side and the cage side respectively. The corona current pulse waveforms under the two measuring methods are compared. The effect of matching resistance on corona current pulse waveform is obtained. The circuit model and transmission line model are established for the two measurement methods. The validity of the model is verified. The comparison and analysis of the two measuring methods are carried out systematically based on the established model, and the relationship between the two measuring methods is clarified. Secondly, based on the corona cage experimental platform, the corona cage experimental platform is built. The time domain characteristics of positive and negative DC current pulse and AC corona current pulse are systematically studied. The distribution mode, waveform parameters, repetition rate and initial characteristics of corona current pulse are studied respectively. The time interval of the second pulse, the distribution of the pulse peak and other effects are analyzed, and the time domain characteristics of the corona current pulse under the AC / DC parallel conductor are obtained. At the same time, based on the ion cloud model of the corona discharge, the time domain characteristic of the corona current pulse is obtained. The modulation effect of adjacent AC conductors on the pulse interval of negative corona current is analyzed and deduced. Finally, In view of the phenomenon that the parallelism of AC / DC conductors observed in this paper will obviously affect the distribution mode and repetition rate of corona current pulses, a numerical model of EMI receiver in quasi-peak detection mode is established. The influence of the parameters of corona current pulse distribution mode, peak value and repetition rate on the quasi peak detection results of the receiver is analyzed. At the same time, in order to establish the relationship between the corona current pulse and the surface ion current, The synchronous measurement of corona current pulse and ion current waveform in time domain under wire plate electrode is carried out. The correlation between corona current pulse and surface ion current waveform is found. A method for calculating surface ion current based on corona current pulse is proposed.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：TM75

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 姚德新;鄒應(yīng)全;蔣沛;;基于針-針電極直流高壓電暈放電暗電流測量大氣相對濕度的研究[J];傳感技術(shù)學(xué)報;2014年12期

2 朱正一;李銳海;王國利;陳燦;賈志東;關(guān)志成;;交直流復(fù)合電壓下電暈放電實驗研究(英文)[J];高電壓技術(shù);2012年08期

3 吳桂芳;袁春峰;陸家榆;鞠勇;趙錄興;楊勇;;特高壓直流線路與交流線路同走廊時混合電磁環(huán)境的計算[J];電網(wǎng)技術(shù);2010年02期

4 張峗;曾嶸;黎小林;羅兵;楊學(xué)昌;何金良;張波;;大氣中短空氣間隙流注放電過程數(shù)值仿真[J];中國電機(jī)工程學(xué)報;2008年28期

5 舒立春;宮林;蔣興良;胡琴;袁前飛;;水滴或污穢對導(dǎo)線電暈放電起始特性的影響[J];高電壓技術(shù);2008年04期

6 邊明遠(yuǎn),李克強(qiáng);基于雙指數(shù)模型的縱向附著系數(shù)計算模型[J];農(nóng)業(yè)機(jī)械學(xué)報;2005年05期

7 毛從光,郭曉強(qiáng),周輝,謝彥召;高空核電磁脈沖模擬波形的雙指數(shù)函數(shù)擬合法[J];強(qiáng)激光與粒子束;2004年03期

8 常衛(wèi)中,李施雄;交直流高壓輸電線路并行傳輸時的無線電干擾特性[J];電網(wǎng)技術(shù);1998年06期

相關(guān)博士學(xué)位論文 前4條

1 劉陽;高壓直流導(dǎo)線電暈電流脈沖的時域特性研究[D];華北電力大學(xué);2015年

2 伍飛飛;直流輸電線路電暈放電的微觀物理過程及離子流場分析[D];重慶大學(xué);2014年

3 劉澤輝;霧霾影響下的直流輸電線路離子流場分布及絕緣子污穢特性研究[D];重慶大學(xué);2014年

4 周象賢;高壓交直流并行線路離子流場的計算方法研究及其應(yīng)用[D];華北電力大學(xué);2013年

相關(guān)碩士學(xué)位論文 前3條

1 李倩;交直流混合輸電線路空間電場的研究[D];華中科技大學(xué);2011年

2 鄒楊;特高壓交直流并行輸電線路的無線電干擾問題研究[D];華北電力大學(xué);2011年

3 宮林;低氣壓下導(dǎo)線表面狀況對電暈放電起始特性影響的研究[D];重慶大學(xué);2008年

，

本文編號：1690539