【摘要】：智能電網(wǎng)的快速發(fā)展對電網(wǎng)的智能化提出更高的要求,快速定位故障并排除故障在該系統(tǒng)中占有越來越多的分量,變得越來越重要。本課題研究的基于北斗衛(wèi)星系統(tǒng)的電網(wǎng)故障行波定位系統(tǒng)的研究,應(yīng)用北斗衛(wèi)星的授時及短報文通信的功能,為故障行波定位精準授時,及實時通信的兩大重要環(huán)節(jié)提供了十分安全及穩(wěn)定可靠的保障。論文首先分析了北斗衛(wèi)星的授時及短報文通信原理,在此基礎(chǔ)上,提出了采用北斗單、雙向冗余授時方式的方法；同時對比分析了不同衛(wèi)星授時的編碼特性,特別地,采用碼分多址結(jié)合擴頻通信的應(yīng)用,降低了北斗信息傳遞過程中誤碼率。通過對衛(wèi)星授時及晶振授時特性的分析,提出了基于全數(shù)字鎖相環(huán)的高精度授時系統(tǒng),建立了新型高精度授時的模型,并對此進行仿真驗證,證實該系統(tǒng)對時鐘授時精度的提高具有明顯的作用；同時,創(chuàng)新性地將北斗短報文衛(wèi)星通信應(yīng)用到故障行波定位系統(tǒng)中,提出了一套北斗通信的流程,機制,詳細分析了北斗通信信息傳遞的結(jié)構(gòu),并對其幀結(jié)構(gòu)及內(nèi)容進行了詳細地闡述,搭建了基于北斗系統(tǒng)的故障行波定位并提出了降低誤碼率的創(chuàng)新性機制。在文章的最后,對系統(tǒng)的硬件結(jié)構(gòu)進行了詳細說明,并通過實驗進行了驗證。理論分析和實驗結(jié)果表明,該系統(tǒng)實現(xiàn)了對故障行波定位裝置的高精度授時,通信的能力能夠滿足裝置對于信息通信的要求,提升了電網(wǎng)的智能化水平。該項成果為我國電網(wǎng)自主性平臺的搭建奠定了堅實的理論及技術(shù)基礎(chǔ)。
[Abstract]:With the rapid development of smart grid, it is more and more important to quickly locate faults and eliminate faults in the system. Based on the Beidou satellite system, the paper studies the fault traveling wave location system of the power network, and applies the functions of the Beidou satellite's time service and short message communication to accurately serve the fault traveling wave location. And two important links of real-time communication provide a very safe and reliable guarantee. Based on the analysis of the principle of Beidou satellite's time service and short message communication, the method of using Beidou single and bi-directional redundant timing method is put forward, and the coding characteristics of different satellites are compared and analyzed, especially in this paper. Code division multiple access (CDMA) combined with spread spectrum communication is used to reduce the bit error rate (BER) in Beidou information transmission process. By analyzing the characteristics of satellite timing and crystal oscillator timing, a high precision timing system based on all-digital phase-locked loop is proposed, and a new model of high-precision timing is established and verified by simulation. It is proved that the system has obvious effect on the improvement of clock timing accuracy, and at the same time, the Beidou short message satellite communication is creatively applied to the fault traveling wave location system, and a set of flow chart and mechanism of Beidou communication are put forward. The structure of Beidou communication information transmission is analyzed in detail, and its frame structure and content are expounded in detail. The fault traveling wave location based on Beidou system is built and an innovative mechanism to reduce the bit error rate is put forward. At the end of the paper, the hardware structure of the system is explained in detail and verified by experiments. The theoretical analysis and experimental results show that the system achieves high precision timing service for fault traveling wave location device, and the communication ability can meet the requirements of information communication of the device and improve the intelligent level of power grid. This achievement has laid a solid theoretical and technical foundation for the construction of autonomous power grid platform in China.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM76;TN967.1

【參考文獻】

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本文編號：2125379