基于極化敏感陣列的電纜故障精確定位技術(shù)
發(fā)布時(shí)間：2019-06-21 03:27
【摘要】：現(xiàn)代社會(huì)中各行各業(yè)對(duì)電能的依賴越來(lái)越大,潛在的電纜故障隱患隨時(shí)可能對(duì)社會(huì)和國(guó)家造成嚴(yán)重的危害。因此,如何在故障發(fā)生后高效快速、精確地找到故障原因與位置并及時(shí)修復(fù)電纜故障,是一個(gè)亟待解決的難題。本論文開展對(duì)電力電纜的故障精確定位技術(shù)的研究,提出基于極化敏感陣列的電纜故障精確定位技術(shù)。論文通過(guò)查閱大量文獻(xiàn)資料闡述了電力電纜產(chǎn)生故障的原因與故障的種類,針對(duì)不同的故障類型,制定故障檢測(cè)的大致步驟流程:確定電纜出現(xiàn)故障相位、對(duì)電纜故障點(diǎn)位置進(jìn)行粗測(cè)預(yù)定位和精確定位。首先分析現(xiàn)行精確定位方法存在的問(wèn)題,在結(jié)合此方法的基礎(chǔ)上引入基于極化敏感陣列的精確定位方法。然后針對(duì)故障精確定位過(guò)程中由高能沖擊信號(hào)發(fā)生器對(duì)故障點(diǎn)進(jìn)行有效沖擊放電,產(chǎn)生出的電磁信號(hào)展開討論。給出了基于極化敏感陣列情況下的進(jìn)行參數(shù)估計(jì)方法,利用空間按一定幾何結(jié)構(gòu)分布的偶極子組或磁環(huán)組估計(jì)故障源所產(chǎn)生的電磁矢量信號(hào)的全部電場(chǎng)分量和磁場(chǎng)分量。結(jié)合電纜故障放電信號(hào)的數(shù)學(xué)模型與極化敏感陣列的陣列流形,分析和改進(jìn)傳統(tǒng)DOA估計(jì)算法,實(shí)現(xiàn)了近場(chǎng)故障點(diǎn)方位信息和位置距離信息的精確估計(jì)。利用經(jīng)典改進(jìn)ESPRIT算法估計(jì)近場(chǎng)源,通過(guò)增加一個(gè)COLD二維矢量天線(Co-centered Orthogonal Loop and Dipole),有效的解決了因?yàn)榻鼒?chǎng)源效應(yīng)而引起的角度近似問(wèn)題。最后,通過(guò)計(jì)算機(jī)MATLAB驗(yàn)證仿真,從理論上論證了該算法的有效性。結(jié)合MATLAB仿真獲得的數(shù)據(jù)進(jìn)行分析,可以得到DOA對(duì)故障源估計(jì)的參數(shù)信息,通過(guò)方位角度和距離信息確定電纜故障的精確位置。仿真結(jié)果表明基于極化敏感陣列的電力電纜精確定位技術(shù)可以快速高效地實(shí)現(xiàn)高阻故障定位,與傳統(tǒng)的電纜故障精確定位技術(shù)相比較具有顯著的優(yōu)勢(shì),在很大程度上解決了現(xiàn)行精確定位方法存在的問(wèn)題,實(shí)現(xiàn)了故障精確定位的智能化。
[Abstract]:In modern society, all kinds of industries rely more and more on electric energy, and the potential hidden trouble of cable fault may cause serious harm to society and country at any time. Therefore, how to find the cause and location of the fault efficiently and quickly after the fault occurs and repair the cable fault in time is an urgent problem to be solved. In this paper, the accurate fault location technology of power cable is studied, and the cable fault accurate location technology based on polarization sensitive array is proposed. In this paper, the causes and types of power cable faults are expounded by consulting a large number of literature. According to different fault types, the general step flow of fault detection is worked out: determining the fault phase of cable, rough prediction and accurate positioning of cable fault point location. Firstly, the existing problems of the current accurate positioning method are analyzed, and the accurate positioning method based on polarization sensitive array is introduced on the basis of this method. Then the electromagnetic signal produced by the high energy shock signal generator is discussed in the process of accurate fault location. In this paper, a parameter estimation method based on polarization sensitive array is presented. The electric field and magnetic field components of the electromagnetic vector signal generated by the fault source are estimated by using the dipole group or magnetic ring group distributed according to a certain geometric structure in space. Combined with the mathematical model of cable fault discharge signal and the array manifolds of polarization sensitive array, the traditional DOA estimation algorithm is analyzed and improved, and the accurate estimation of azimuth information and position distance information of near field fault point is realized. The classical improved ESPRIT algorithm is used to estimate the near-field source, and an COLD two-dimensional vector antenna (Co-centered Orthogonal Loop and Dipole),) is added to effectively solve the problem of angle approximation caused by the near-field source effect. Finally, the effectiveness of the algorithm is demonstrated theoretically by computer MATLAB verification and simulation. Combined with the data obtained by MATLAB simulation, the parameter information of fault source estimation by DOA can be obtained, and the accurate position of cable fault can be determined by azimuth angle and distance information. The simulation results show that the power cable accurate location technology based on polarization sensitive array can realize high resistance fault location quickly and efficiently. Compared with the traditional cable fault accurate location technology, it has remarkable advantages, solves the problems existing in the current accurate location method to a great extent, and realizes the intelligent fault accurate location.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM75
本文編號(hào)：2503751
[Abstract]:In modern society, all kinds of industries rely more and more on electric energy, and the potential hidden trouble of cable fault may cause serious harm to society and country at any time. Therefore, how to find the cause and location of the fault efficiently and quickly after the fault occurs and repair the cable fault in time is an urgent problem to be solved. In this paper, the accurate fault location technology of power cable is studied, and the cable fault accurate location technology based on polarization sensitive array is proposed. In this paper, the causes and types of power cable faults are expounded by consulting a large number of literature. According to different fault types, the general step flow of fault detection is worked out: determining the fault phase of cable, rough prediction and accurate positioning of cable fault point location. Firstly, the existing problems of the current accurate positioning method are analyzed, and the accurate positioning method based on polarization sensitive array is introduced on the basis of this method. Then the electromagnetic signal produced by the high energy shock signal generator is discussed in the process of accurate fault location. In this paper, a parameter estimation method based on polarization sensitive array is presented. The electric field and magnetic field components of the electromagnetic vector signal generated by the fault source are estimated by using the dipole group or magnetic ring group distributed according to a certain geometric structure in space. Combined with the mathematical model of cable fault discharge signal and the array manifolds of polarization sensitive array, the traditional DOA estimation algorithm is analyzed and improved, and the accurate estimation of azimuth information and position distance information of near field fault point is realized. The classical improved ESPRIT algorithm is used to estimate the near-field source, and an COLD two-dimensional vector antenna (Co-centered Orthogonal Loop and Dipole),) is added to effectively solve the problem of angle approximation caused by the near-field source effect. Finally, the effectiveness of the algorithm is demonstrated theoretically by computer MATLAB verification and simulation. Combined with the data obtained by MATLAB simulation, the parameter information of fault source estimation by DOA can be obtained, and the accurate position of cable fault can be determined by azimuth angle and distance information. The simulation results show that the power cable accurate location technology based on polarization sensitive array can realize high resistance fault location quickly and efficiently. Compared with the traditional cable fault accurate location technology, it has remarkable advantages, solves the problems existing in the current accurate location method to a great extent, and realizes the intelligent fault accurate location.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM75
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 李新平;任常娥;馬志昆;周勇華;唐英波;;電纜局部放電測(cè)試中本體放電和干擾的識(shí)別及放電點(diǎn)的準(zhǔn)確定位[J];電線電纜;2007年03期
，本文編號(hào)：2503751
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