本文選題：行波測(cè)距 + 雷電定位系統(tǒng)��； 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：高壓輸電線路往往擔(dān)負(fù)著很大的輸送電能任務(wù),跨域大,距離長(zhǎng),地形復(fù)雜。統(tǒng)計(jì)數(shù)據(jù)表明,雷擊跳閘一直是影響線路安全穩(wěn)定運(yùn)行的最主要因素,因此,準(zhǔn)確獲得線路故障位置,正確判斷雷擊故障類(lèi)型,有利于快速查找故障點(diǎn),減輕巡線工作量,針對(duì)性地改進(jìn)線路防雷,減少線路雷擊跳閘率,提高輸電可靠性。行波測(cè)距技術(shù)有助于快速、準(zhǔn)確地確定線路故障位置,但行波波頭捕捉易受干擾、可靠性差,測(cè)距結(jié)果不穩(wěn)定、離度大,對(duì)不同性質(zhì)的故障適應(yīng)性不強(qiáng),自動(dòng)化分析程度低等缺陷進(jìn)一步暴露,亟待深入研究和解決。雷電定位系統(tǒng)可測(cè)量雷擊的位置與時(shí)間,對(duì)于輸電線路的防雷具有重要意義,然而由于它測(cè)量精度受地形影響較大,因此,雷電定位系統(tǒng)無(wú)法準(zhǔn)確判斷雷擊是否擊中輸電線路或桿塔。目前,現(xiàn)場(chǎng)運(yùn)維人員得到行波測(cè)距結(jié)果后通過(guò)WEB查詢(xún)雷電定位系統(tǒng)雷擊數(shù)據(jù),根據(jù)查詢(xún)結(jié)果及經(jīng)驗(yàn)判斷故障是否為雷擊故障。這種方法其主觀性太強(qiáng)且忽略了電氣量故障數(shù)據(jù)的波形特征,此方法得出的結(jié)論的可信度較低,不能準(zhǔn)確判別雷擊故障與非雷擊故障。因此,深入分析并提取二者數(shù)據(jù)中的有效信息、探索二者的結(jié)合方式以及得出準(zhǔn)確的故障類(lèi)型判據(jù),將有助于判別雷擊故障和非雷擊故障。
[Abstract]:High-voltage transmission lines often shoulder the task of transmitting electric energy, cross-domain large, long distance, complex terrain. The statistical data show that lightning tripping has always been the most important factor affecting the safe and stable operation of the line. Therefore, obtaining the fault location of the line accurately and correctly judging the type of the lightning strike fault can help to find the fault point quickly and reduce the work load of the line patrol. The lightning protection of transmission line is improved, the lightning tripping rate is reduced, and the transmission reliability is improved. Traveling wave location technology is helpful to determine the fault location of line quickly and accurately, but the traveling wave head capture is easy to be disturbed, the reliability is poor, the location result is unstable, the degree of deviation is large, and the fault adaptability to different properties is not strong. The low degree of automation analysis and other defects further exposed, need to be further studied and resolved. The location and time of lightning strike can be measured by lightning location system, which is of great significance to the lightning protection of transmission line. However, the accuracy of lightning location is greatly affected by the topography. Lightning location system can not accurately determine whether lightning strikes transmission lines or tower. At present, after the operator gets the traveling wave location result, the lightning strike data of the lightning location system is queried by the Web, and the lightning strike fault is judged according to the query result and experience. This method is too subjective and neglects the waveform characteristics of electrical fault data. The conclusion of this method is not reliable and can not accurately distinguish the lightning fault from the non-lightning fault. Therefore, it is helpful to analyze and extract the effective information from the two data, to explore the combination of the two and to obtain the accurate criterion of the fault type, which will help to distinguish the lightning strike fault from the non-lightning strike fault.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM863

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