【摘要】：在配電網(wǎng)自動化系統(tǒng)中,智能配變終端是滿足自動化需求不可或缺的配電網(wǎng)組件,它可以實時監(jiān)測和分析配電變壓器的工作情況,對于配電網(wǎng)的安全性、可靠性等方面都有著重大意義。隨著電力線載波通信方式的快速發(fā)展,使其在智能配電網(wǎng)通信中的優(yōu)勢變得越來越明顯,它作為一種物理強度大、覆蓋范圍廣、無需布線、成本少的特殊接入方式,正被廣泛應(yīng)用。由于電力線信道復雜的通信特性,在數(shù)據(jù)傳輸過程中,會有高誤碼率、低可靠性的現(xiàn)象存在,為此,本文采用了基于正交頻分復用技術(shù)的G3-PLC標準,它是面向智能電網(wǎng)的全球開放性協(xié)議,通過采取先進的信道編碼技術(shù)以及強大的糾錯編碼機制,保證信號在電力線信道中能夠進行強大的數(shù)據(jù)通信。本文首先概述了電力線通信的發(fā)展歷程,論述了窄帶電力線通信的發(fā)展現(xiàn)狀,著重介紹了智能配變終端的整體設(shè)計。其次,論述了OFDM技術(shù)的工作原理和關(guān)鍵技術(shù),詳細說明了G3-PLC標準的協(xié)議和幀結(jié)構(gòu)。隨后,借助TI公司的PLC開發(fā)板和軟件程序從物理層角度分析了信號在電力線復雜信道傳輸中的通信性能,為G3-PLC標準可以有效應(yīng)用在智能配變終端提供依據(jù)。最后,依據(jù)DLT/645規(guī)約,對基于G3-PLC標準的智能配變終端進行集中抄表測試。經(jīng)過大量測試表明,基于G3-PLC標準的智能配變終端低壓集中抄表性能優(yōu)良,具備低誤碼率、高可靠性的特點,所測得各項數(shù)據(jù)均符合要求,達到了預期的效果。
[Abstract]:In the distribution network automation system, intelligent distribution transformer terminal is an indispensable component of distribution network, which can monitor and analyze the working condition of distribution transformer in real time, and the security of distribution network. Reliability and other aspects are of great significance. With the rapid development of power line carrier communication mode, its advantages in smart distribution network communication become more and more obvious. It is a special access mode with large physical intensity, wide coverage, no wiring and low cost. Is being widely used. Because of the complex communication characteristics of power line channel, the phenomenon of high bit error rate and low reliability will exist in the process of data transmission. Therefore, the G3-PLC standard based on orthogonal frequency division multiplexing technology is adopted in this paper. It is a global open protocol for smart grid. By adopting advanced channel coding technology and powerful error-correcting coding mechanism, it ensures that the signal can carry out powerful data communication in the power line channel. In this paper, the development course of power line communication is summarized, the present situation of narrow band power line communication is discussed, and the whole design of intelligent distribution transformer terminal is introduced emphatically. Secondly, the working principle and key technology of OFDM technology are discussed, and the protocol and frame structure of G3-PLC standard are explained in detail. Then, with the help of TI's PLC development board and software program, the communication performance of signal in power line complex channel transmission is analyzed from the point of view of physical layer, which provides the basis for the effective application of G3-PLC standard in intelligent distribution transformer terminal. Finally, according to DLT/645 protocol, the intelligent distribution transformer terminal based on G3-PLC standard is tested by centralized meter reading. A large number of tests show that the intelligent distribution transformer terminal based on G3-PLC has excellent performance, low bit error rate and high reliability. All the measured data meet the requirements and achieve the desired results.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM76

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