本文選題：配電網(wǎng) + 電纜故障定位��； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：隨著電纜的運(yùn)行負(fù)荷和時(shí)間的不斷增長以及應(yīng)用數(shù)量的持續(xù)增多等原因，電力系統(tǒng)中電纜的故障率也越來越高，因此成為影響供電部門正常供電的主要障礙之一。但是，就目前來看，仍然缺少適用范圍廣、實(shí)用性強(qiáng)的電纜故障定位方法。本文研究了現(xiàn)有的電纜故障定位技術(shù)，將各種主要定位理論的原理方法進(jìn)行對比分析，總結(jié)各種方法的適用范圍和優(yōu)缺點(diǎn)，并且在深入研究了行波法電纜故障定位的基礎(chǔ)上給出了一種基于脈沖注入法的電纜故障定位方法。該方法的原理為將高壓脈沖信號注入電纜故障相，故障點(diǎn)放電就會形成一個(gè)突跳電壓波，突跳電壓波傳回脈沖注入端并由信號接收電路接收，計(jì)算發(fā)送電壓波時(shí)間及反射回來時(shí)間的時(shí)間差，根據(jù)時(shí)間差可以計(jì)算出故障點(diǎn)位置。此方法定位設(shè)備簡單易操作，定位效果穩(wěn)定。該方法能否有效定位，高壓脈沖源的設(shè)計(jì)至關(guān)重要，本文提出了高壓脈沖源的設(shè)計(jì)方法，其優(yōu)點(diǎn)為注入脈沖寬度、周期皆為可調(diào)，可檢測多種故障類型，，并且可在電纜預(yù)定位及精確定位的多種定位方法原理中使用。文章給出了故障定位系統(tǒng)總體方案設(shè)計(jì)，并對其中高壓脈沖源以及信號接收電路的軟硬件設(shè)計(jì)進(jìn)行了詳細(xì)說明。設(shè)計(jì)了信號接收電路，完成了定位軟件的編寫。經(jīng)過理論分析及實(shí)驗(yàn)室電纜放電模擬實(shí)驗(yàn)，證明了設(shè)計(jì)中的高壓脈沖源故障定位的可行性，也說明應(yīng)用脈沖注入法在電纜故障定位中是切實(shí)可行的。
[Abstract]:With the continuous increase of the running load and time of the cable and the continuous increase of the number of applications, the failure rate of the cable in the power system becomes more and more high, so it becomes one of the main obstacles to the normal power supply in the power supply department. However, at present, there is still a lack of a wide range of practical cable fault location methods. In this paper, the existing cable fault location technology is studied, the principle and methods of various main positioning theories are compared and analyzed, and the applicable scope, advantages and disadvantages of these methods are summarized. A method of cable fault location based on pulse injection method is presented on the basis of in-depth study of traveling wave method for cable fault location. The principle of this method is that the high voltage pulse signal is injected into the fault phase of the cable, and the fault point discharge will form a sudden jump voltage wave, which is transmitted back to the pulse injection terminal and received by the signal receiving circuit. The time difference between the time of transmitting voltage wave and the time of reflection back can be calculated, and the location of fault point can be calculated according to the time difference. This method is simple and easy to operate, and the positioning effect is stable. The design of high voltage pulse source is very important to the effective location of this method. In this paper, the design method of high voltage pulse source is proposed. The advantages of this method are that the injection pulse width is adjustable, the period is adjustable, and a variety of fault types can be detected. And can be used in cable pre-positioning and accurate positioning of a variety of positioning principles. In this paper, the overall scheme of the fault location system is presented, and the hardware and software design of the high voltage pulse source and the signal receiving circuit are described in detail. The signal receiving circuit is designed, and the software of positioning is completed. Through theoretical analysis and simulation experiment of cable discharge in laboratory, the feasibility of fault location of high voltage pulse source in the design is proved, and the feasibility of applying pulse injection method in cable fault location is also proved.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM75

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 雷斌;淺析IGBT的門極驅(qū)動[J];電焊機(jī);2002年02期

2 魏書寧,龔仁喜,劉s

本文編號：1807173