本文選題：配電系統(tǒng) + 載波通信　； 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：智能配電網(wǎng)作為智能電網(wǎng)的重要組成部分,是堅(jiān)強(qiáng)智能電網(wǎng)的基石。中壓配電網(wǎng)電力線載波通信的實(shí)現(xiàn),對(duì)于完善更靈活、更簡潔的智能配電網(wǎng)具有重要的實(shí)際應(yīng)用價(jià)值。本文基于OFDM技術(shù)開展配電系統(tǒng)載波通信網(wǎng)絡(luò)應(yīng)用研究,內(nèi)容如下:(1)設(shè)計(jì)了一套基于OFDM技術(shù)的中壓電力線載波通信裝置,包括硬件電路設(shè)計(jì)、程序設(shè)計(jì)以及配套軟件開發(fā)。在實(shí)際測試應(yīng)用過程中,根據(jù)測試中發(fā)現(xiàn)的問題,對(duì)硬件裝置進(jìn)行了3次改進(jìn),完善了裝置性能。(2)通過對(duì)中壓電力線載波信道的分析以及實(shí)際現(xiàn)場測試,得出提升中壓電力線載波通信裝置性能的兩條有效途徑:減小載波信號(hào)衰減、規(guī)避載波信道頻率選擇性衰落凹點(diǎn)。在實(shí)際應(yīng)用中,實(shí)現(xiàn)耦合裝置與載波通信裝置的阻抗匹配對(duì)減小載波信號(hào)衰減具有重要作用。在載波裝置中端接一精密數(shù)字可調(diào)電阻,根據(jù)實(shí)際耦合裝置參數(shù),通過MCU控制單元調(diào)節(jié)精密數(shù)字可調(diào)電阻的數(shù)值,實(shí)現(xiàn)阻抗匹配,減少了信號(hào)衰減。同時(shí),為有效規(guī)避載波信道頻率選擇性衰落凹點(diǎn),提出了中壓電力線載波通信自適應(yīng)最優(yōu)子信道選擇算法,動(dòng)態(tài)調(diào)整載波子信道,實(shí)現(xiàn)最優(yōu)分配,并將算法程序嵌入到載波通信裝置,實(shí)測效果良好。(3)針對(duì)實(shí)際中壓配電線路通信節(jié)點(diǎn)眾多,配電網(wǎng)絡(luò)復(fù)雜,且對(duì)通信網(wǎng)絡(luò)后期擴(kuò)展性要求較高等問題,提出了先組建星型載波通信網(wǎng),進(jìn)而構(gòu)建樹形載波通信網(wǎng),逐級(jí)擴(kuò)展,最終實(shí)現(xiàn)通信節(jié)點(diǎn)全覆蓋的靈活組網(wǎng)方式。最終用自主設(shè)計(jì)的中壓電力線載波通信裝置在實(shí)際配電線路上掛網(wǎng)測試,通信效果較為理想。
[Abstract]:As an important part of smart grid, smart distribution network is the cornerstone of strong smart grid. The realization of power line carrier communication in medium voltage distribution network has important practical application value for perfecting more flexible and succinct intelligent distribution network. In this paper, the carrier communication network application of distribution system based on OFDM technology is studied. The contents are as follows: 1) A set of medium voltage power line carrier communication device based on OFDM technology is designed, including hardware circuit design, program design and supporting software development. In the course of practical testing and application, according to the problems found in the test, the hardware device has been improved three times, and the performance of the device has been improved by the analysis of the medium voltage power line carrier channel and the actual field test. Two effective ways to improve the performance of medium voltage power line carrier communication device are obtained: reducing the attenuation of carrier signal and avoiding the frequency selective fading concave of carrier channel. In practical applications, the impedance matching between the coupling device and the carrier communication device plays an important role in reducing the attenuation of the carrier signal. A precise digital adjustable resistor is connected in the carrier device. According to the actual coupling device parameters, the numerical value of the precision digital adjustable resistance is adjusted by the MCU control unit to achieve impedance matching and reduce the signal attenuation. At the same time, in order to avoid frequency selective fading concave of carrier channel effectively, an adaptive optimal subchannel selection algorithm for medium voltage power line carrier communication is proposed to dynamically adjust the carrier subchannel to achieve optimal allocation. The algorithm program is embedded into the carrier communication device, and the measured results are good. Aiming at the problems such as the number of communication nodes in the actual medium voltage distribution line, the complexity of the distribution network, and the high demand for the later expansibility of the communication network, etc. First, the star carrier communication network is constructed, and then the tree-shaped carrier communication network is constructed, which can be extended step by step, and finally, the flexible network with full coverage of communication nodes is realized. Finally, the medium voltage power line carrier communication device designed by ourselves is used to test the actual distribution line, and the communication effect is satisfactory.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM73;TN913.6

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本文編號(hào)：1977910