【摘要】：隨著IEC61850標(biāo)準(zhǔn)的不斷完善,智能變電站對(duì)時(shí)鐘源精度和穩(wěn)定性的要求越來(lái)越高。本文以智能變電站為應(yīng)用背景,根據(jù)GPS與晶振的誤差互補(bǔ)特性,提出了滿足智能變電站時(shí)鐘同步精度要求的高精度時(shí)鐘設(shè)計(jì)方案。 論文首先研究了GPS時(shí)鐘與晶振時(shí)鐘誤差特性,并對(duì)GPS時(shí)鐘與晶振時(shí)鐘的秒脈沖時(shí)間間隔進(jìn)行分析,論證了該時(shí)間間隔為GPS時(shí)鐘與晶振時(shí)鐘誤差之和；然后,對(duì)實(shí)驗(yàn)采集的秒脈沖時(shí)間間隔曲線進(jìn)行傅立葉分析,從而確定采用小波濾波+RBF神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)的高精度時(shí)鐘算法,并完成對(duì)高精度時(shí)鐘的總體結(jié)構(gòu)和各模塊的設(shè)計(jì)；接著,采用MATLAB軟件對(duì)小波濾波算法、RBF網(wǎng)絡(luò)預(yù)測(cè)算法以及組合算法進(jìn)行仿真驗(yàn)證,結(jié)果表明本文高精度時(shí)鐘算法能夠很好地濾除GPS時(shí)鐘的隨機(jī)誤差,并實(shí)現(xiàn)對(duì)晶振時(shí)鐘誤差的精確預(yù)測(cè)。 論文最后還論述了本文高精度時(shí)鐘的軟硬件實(shí)現(xiàn)過(guò)程,其中包括Compact-RIO平臺(tái)的開(kāi)發(fā)和IRIG-B碼解析板卡的研制兩個(gè)部分。采用銣原子鐘裝置對(duì)本文所設(shè)計(jì)的高精度時(shí)鐘進(jìn)行性能測(cè)試,測(cè)試結(jié)果表明該高精度時(shí)鐘輸出的秒脈沖精確性高、穩(wěn)定性好,能夠滿足智能變電站時(shí)鐘精度的要求。
[Abstract]:With the improvement of IEC61850 standard, the precision and stability of clock source are required more and more in intelligent substation. Based on the application background of intelligent substation and the complementary error between GPS and crystal oscillator, a high precision clock design scheme for intelligent substation clock synchronization accuracy is proposed in this paper. Firstly, the error characteristics of GPS clock and crystal oscillator clock are studied, and the second pulse time interval between GPS clock and crystal oscillator clock is analyzed. It is proved that the time interval is the sum of GPS clock and crystal oscillator clock error. Then, the time-interval curve of second pulse is analyzed by Fourier analysis, and the high-precision clock algorithm predicted by wavelet filter RBF neural network is determined, and the overall structure of high-precision clock and the design of each module are completed. Then, the wavelet filtering algorithm, the RBF network prediction algorithm and the combination algorithm are simulated by MATLAB software. The results show that the high precision clock algorithm in this paper can filter the random error of GPS clock very well. The accurate prediction of clock error is realized. At the end of the paper, the software and hardware implementation of high precision clock is discussed, including the development of Compact-RIO platform and the development of IRIG-B code analysis board. The performance of the high precision clock designed in this paper is tested by using rubidium atomic clock device. The test results show that the clock output of this high precision clock has high accuracy and good stability, and it can meet the requirements of clock precision in intelligent substation.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM63;TM76

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本文編號(hào)：2323552