【摘要】：低壓電力線通信系統(tǒng)具有成本低、分布廣、接入簡單等特點,在電力信息傳輸網(wǎng)絡中有極其重要的應用前景,是近年來學者研究的主要問題。G3-PLC標準能夠?qū)崿F(xiàn)數(shù)據(jù)信息高效且穩(wěn)定的傳輸,利用FPGA(Field Programmable Gate Array)設計靈活,開發(fā)周期短以及特有的并行處理方式等特點實現(xiàn)低壓電力線通信,能夠有效的提高算法效率和傳輸速率,解決現(xiàn)有系統(tǒng)集成度低、擴展性差、價格昂貴等問題。論文研究分析了低壓電力線信道的傳輸特性,著重闡述了低壓電力線信道的阻抗特性、多徑衰落特性和環(huán)境噪聲,根據(jù)其信道特性建立了低壓電力線信道模型,并依據(jù)G3-PL標準的相關規(guī)定確定本系統(tǒng)的結構組成和設計目標參數(shù)。然后利用Altera FPGA平臺實現(xiàn)OFDM調(diào)制解調(diào),在Quartus II開發(fā)環(huán)境下利用Verilog語言進行了程序設計及時序和仿真驗證,使用SignalTap II邏輯分析儀捕獲OFDM系統(tǒng)實時信號,驗證了調(diào)制解調(diào)模塊設計的正確性和有效性。論文分析了電力線耦合模塊的設計要求和技術指標,使用TI公司的AFE031芯片設計了系統(tǒng)的外圍電路,包括模擬前端電路和耦合變壓器設計,同時在simulink平臺下對設計電路進行仿真。仿真結果表明所設計的電路滿足系統(tǒng)的要求,為后續(xù)在電力線中實際通信和測試提供了平臺。
[Abstract]:Low-voltage power line communication system has the characteristics of low cost, wide distribution, simple access and so on. It has an extremely important application prospect in electric power information transmission network. In recent years, G3-PLC standard can realize the efficient and stable transmission of data information, make use of the characteristics of flexible design of FPGA (Field Programmable Gate Array), short development period and special parallel processing mode to realize low-voltage power line communication. It can effectively improve the efficiency and transmission rate of the algorithm, and solve the problems of low integration, poor expansibility, high price and so on. In this paper, the transmission characteristics of low voltage power line channel are studied and analyzed. The impedance characteristic, multipath fading characteristic and environmental noise of low voltage power line channel are expounded. According to its channel characteristics, a low voltage power line channel model is established. And according to the relevant provisions of the G3-PL standard, the structure of the system and design objective parameters are determined. Then the OFDM modulation and demodulation is realized by using Altera FPGA platform. Under the Quartus II development environment, the program design, timing and simulation verification are carried out by Verilog language, and the real time signal of OFDM system is captured by SignalTap II logic analyzer. The correctness and validity of modulation and demodulation module design are verified. The design requirements and technical specifications of the power line coupling module are analyzed in this paper. The peripheral circuits of the system are designed by using the AFE031 chip of TI, including the analog front-end circuit and the coupling transformer design. At the same time, the design circuit is simulated under the simulink platform. The simulation results show that the designed circuit meets the requirements of the system and provides a platform for subsequent practical communication and testing in the power line.
【學位授予單位】：貴州大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN913.6
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本文編號：2281328