【摘要】：隨著科技的進步和社會的發(fā)展,各類行業(yè)對電力系統(tǒng)的依賴程度日漸增加,電網(wǎng)規(guī)模不斷擴大。由于人為破壞或自然不可抗拒力等原因,電網(wǎng)故障引起大規(guī)模停電事故的概率亦有所增加,將造成供電質(zhì)量的下降,甚至損壞電氣設備等后果。顯而易見,亟需一套比較完備的故障診斷系統(tǒng),為電力人員分析決策提供可靠的技術(shù)支持,減少故障的蔓延,保證優(yōu)質(zhì)穩(wěn)定的電能供應。首先,在現(xiàn)有的研究成果前提下,研究了基于時序顏色Petri網(wǎng)的故障診斷方法,并完善了模型,通過時序公式充分利用遠后備保護信息,使其即使在主保護信息缺失的情況下仍可繼續(xù)進行故障診斷。同時用軟件MATLAB編程實現(xiàn)診斷過程以確定故障元件。然后,通過將與或樹元素融入到顏色Petri網(wǎng)中,利用與或樹突出的容錯性及邏輯表達能力和顏色Petri網(wǎng)的折疊功能,形成二者優(yōu)點結(jié)合的診斷模型,不僅診斷過程比較簡單,具有較好的處理不完備信息的能力,而且具有規(guī)模較小、簡易清晰的優(yōu)勢,可避免組合爆炸,通用性和適應性較好。最后,利用仿真軟件MATLAB GUI對故障診斷進行了界面的設計與實現(xiàn),并用算例進行驗證。通過MATLAB GUI將系統(tǒng)的拓撲結(jié)構(gòu)圖與故障診斷功能集成到一起,既可以形象地展現(xiàn)出系統(tǒng)各元件的連接關(guān)系,又可以使用戶清晰地看到故障信息和診斷結(jié)果,方便操作與分析、增強了人機互動。
[Abstract]:With the progress of science and technology and the development of society, the dependence of various industries on power system is increasing day by day, and the scale of power grid is expanding. As a result of artificial destruction or natural irresistible force, the probability of large-scale power outages caused by power grid failures has also increased, which will lead to the decline of power supply quality and even the damage of electrical equipment and other consequences. It is obvious that there is an urgent need for a complete fault diagnosis system to provide reliable technical support for the analysis and decision of power personnel, to reduce the spread of the fault and to ensure the high quality and stable power supply. First of all, based on the existing research results, the fault diagnosis method based on temporal color Petri nets is studied, and the model is improved, and the remote backup protection information is fully utilized by time series formula. The fault diagnosis can be continued even if the primary protection information is missing. At the same time, the software MATLAB is used to realize the diagnosis process to determine the fault components. Then, by integrating the and or tree elements into the color Petri net, using the fault tolerance and logic expression ability of the and or tree and the folding function of the color Petri net, the diagnostic model combining the advantages of the two is formed, and the diagnosis process is not only simple, but also simple. It has the ability to deal with incomplete information, and has the advantages of small scale, simple and clear, can avoid combination explosion, good versatility and adaptability. Finally, the interface of fault diagnosis is designed and implemented by using the simulation software MATLAB GUI, and an example is used to verify it. By integrating the topological structure diagram of the system with the function of fault diagnosis through MATLAB GUI, the connection relationship of each component of the system can be displayed vividly, and the user can see the fault information and diagnosis result clearly, which is convenient for operation and analysis. Enhanced man-machine interaction.
【學位授予單位】：山東科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM711

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