【摘要】：隨著電力系統(tǒng)規(guī)模日益擴(kuò)大,輸電網(wǎng)絡(luò)結(jié)構(gòu)也愈加復(fù)雜,傳統(tǒng)的雙端行波故障測(cè)距方法將無(wú)法滿足輸電網(wǎng)絡(luò)故障測(cè)距準(zhǔn)確性和可靠性的要求。為此,論文以圖論為數(shù)學(xué)基礎(chǔ),提出了一種基于雙端行波法的多端輸電線路故障測(cè)距改進(jìn)算法,并通過(guò)仿真驗(yàn)證了該方法的可靠性和實(shí)用性。本文首先介紹了行波故障測(cè)距在國(guó)內(nèi)外的發(fā)展歷程和多端輸電線路故障測(cè)距的研究現(xiàn)狀。現(xiàn)有的基于小波變換的多端輸電線路故障測(cè)距算法和基于希爾伯特-黃變換的多端輸電線路故障測(cè)距算法都只能進(jìn)行傳統(tǒng)的雙端行波故障測(cè)距。當(dāng)其中一端行波故障測(cè)距裝置出現(xiàn)故障時(shí),就會(huì)造成故障測(cè)距失敗�；趫D論的網(wǎng)絡(luò)故障行波測(cè)距方法構(gòu)建測(cè)距網(wǎng)絡(luò),利用最短路徑算法,將復(fù)雜的多端輸電網(wǎng)絡(luò)簡(jiǎn)化成輻射型網(wǎng)絡(luò),并運(yùn)用數(shù)據(jù)加權(quán)融合技術(shù)對(duì)故障位置進(jìn)行測(cè)距。即使在行波裝置一端失信時(shí)也能獲得準(zhǔn)確的故障測(cè)距結(jié)果。但該算法在對(duì)故障測(cè)距結(jié)果進(jìn)行加權(quán)融合處理時(shí),只考慮了故障行波傳輸路徑上變電站對(duì)測(cè)距結(jié)果的作用,忽略了相鄰變電站的輸電線路傳輸距離對(duì)故障測(cè)距精度的影響。為了提高該算法的精度和可靠性,本文對(duì)這一算法進(jìn)行了改進(jìn),使算法精度更高,可靠性更強(qiáng)。最后,引入220kV輸電網(wǎng)故障實(shí)例,運(yùn)用Matlab建立仿真模型,并對(duì)以上三種測(cè)距方法進(jìn)行仿真分析。仿真結(jié)果表明,與傳統(tǒng)的小波變換法和HHT故障測(cè)距法相比,本文提出的改進(jìn)的基于雙端行波法的多端輸電線路故障測(cè)距方法具有較高的測(cè)距精度和可靠性。并且不受故障類型、部分節(jié)點(diǎn)記錄錯(cuò)誤時(shí)間的影響,適用于多端輸電線路故障測(cè)距。該研究成果將為下一步開(kāi)發(fā)應(yīng)用行波保護(hù)裝置奠定理論和技術(shù)基礎(chǔ)。
[Abstract]:With the increasing scale of power system and the complexity of transmission network structure, the traditional dual-terminal traveling wave fault location method will not meet the requirements of accuracy and reliability of fault location in transmission network. Therefore, based on graph theory, an improved fault location algorithm for multi-terminal transmission lines based on two-terminal traveling wave method is proposed, and the reliability and practicability of the method are verified by simulation. This paper first introduces the development of traveling wave fault location at home and abroad and the research status of multi-terminal transmission line fault location. The existing multi-terminal transmission line fault location algorithms based on wavelet transform and Hilbert-Huang transform can only carry out traditional two-terminal traveling wave fault location. When one end of the traveling wave fault location device failure, it will cause fault location failure. The fault location network is constructed based on graph theory. The complex multi-terminal transmission network is simplified into a radiative network by using the shortest path algorithm and the data weighted fusion technique is used to locate the fault location. Accurate fault location results can be obtained even when one end of the traveling wave device is discredited. However, in the weighted fusion of fault location results, the algorithm only considers the effect of substation on fault location result on the transmission path of fault traveling wave, and neglects the influence of transmission distance of transmission line of adjacent substation on fault location accuracy. In order to improve the accuracy and reliability of the algorithm, the algorithm is improved in this paper, which makes the algorithm more accurate and reliable. Finally, an example of fault in 220kV transmission network is introduced, and the simulation model is established by Matlab, and the above three fault location methods are simulated and analyzed. The simulation results show that compared with the traditional wavelet transform and HHT fault location method, the improved fault location method based on two-terminal traveling wave method has higher accuracy and reliability. And it is not affected by fault type, and some nodes record error time, so it is suitable for fault location of multi-terminal transmission line. The research results will lay a theoretical and technical foundation for the further development and application of traveling wave protection device.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM75

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉洪正;高厚磊;韓志駿;李超;鄒貴彬;陳學(xué)偉;;輸電線路加權(quán)數(shù)據(jù)融合故障測(cè)距算法研究[J];電力系統(tǒng)保護(hù)與控制;2014年15期

2 古斌;譚建成;唐偉斌;;基于相序變換的三相系統(tǒng)瞬時(shí)功率定義[J];電力系統(tǒng)保護(hù)與控制;2012年21期

3 蘇廣寧;張沛超;胡炎;嚴(yán)正;;基于多源信息的電網(wǎng)故障診斷新方法[J];電力系統(tǒng)自動(dòng)化;2012年01期

4 秦華錕;;高壓輸電線路故障測(cè)距算法綜述[J];企業(yè)科技與發(fā)展;2011年19期

5 王富勇;房海榮;;基于小波變換的新型輸電線路故障測(cè)距系統(tǒng)設(shè)計(jì)[J];電測(cè)與儀表;2009年04期

6 曾祥君;鄧豐;李澤文;李靈;楚湘輝;;基于信息融合的故障行波定位網(wǎng)絡(luò)算法[J];電力科學(xué)與技術(shù)學(xué)報(bào);2009年01期

7 李澤文;姚建剛;曾祥君;楚湘輝;鄧豐;;基于整個(gè)電網(wǎng)行波時(shí)差的故障定位方法[J];中國(guó)電機(jī)工程學(xué)報(bào);2009年04期

8 曾祥君;陳楠;李澤文;鄧豐;;基于網(wǎng)絡(luò)的故障行波定位算法[J];中國(guó)電機(jī)工程學(xué)報(bào);2008年31期

9 田書(shū);賈純純;馬超;;故障定位中小波基的選擇研究[J];煤礦機(jī)械;2008年09期

10 于桂音;陳平;徐丙垠;哈恒旭;;基于行波原理的優(yōu)化組合故障測(cè)距技術(shù)[J];繼電器;2008年09期

，

本文編號(hào)：2368179