【正文】 電力變壓器 溫度 的在線監(jiān)測與診斷 摘要 伴隨著我國經(jīng)濟的快速發(fā)展，我國的電網(wǎng)運行水平也在不斷提高，電力變壓器是電力系統(tǒng)中最重要的、最昂貴的設(shè)備之一，它的可靠性直接關(guān)系到電網(wǎng)是否安全、高效、經(jīng)濟的運行。大部分變壓器壽命的終結(jié)是因為其喪失了應(yīng)有的絕緣能力，而影響絕緣能力的最主要因素是變壓器運行時的繞組溫度。如果變壓器運行時的繞組最熱點溫度過低，則變壓器的能力就沒有得到充分利用，減低了經(jīng)濟效益，而熱點溫度過高，不僅會影響變壓器使用壽命，還將對變壓器安全運行造成威脅。電力變壓器內(nèi)部屬于高電壓、強電磁場環(huán)境，對于變壓器 繞組溫度的監(jiān)測，光纖光柵傳感技術(shù)與傳統(tǒng)的電信號傳感技術(shù)相比具有無法比擬的優(yōu)勢，尤其是適于電力變壓器內(nèi)部的復(fù)雜電磁環(huán)境。 本論文研究分布式光纖傳感器的應(yīng)用系統(tǒng)，主要包括兩方面。首先，深入細致地分析研究了分布式光纖溫度傳感器系統(tǒng)的原理；分析目前世界上光纖測溫的先進技術(shù)以及科研成果，采用基于拉曼散射的反斯托克斯和斯托克斯光的光強比較技術(shù)，從空間和溫度分辨率入手，結(jié)合實際情況制定本系統(tǒng)的可行方法。其次對系統(tǒng)的每一部分都以物理公式的推導(dǎo)為基礎(chǔ)，以變使系統(tǒng)各部分的構(gòu)建達到最優(yōu)化；最終將復(fù)雜的系統(tǒng)分解為較為簡單的、有利于 我們用軟硬件實現(xiàn)的部分。其次，在系統(tǒng)原理明確的基礎(chǔ)上實現(xiàn)了該系統(tǒng)的光纖采樣及后面的軟件運算等部分，依據(jù)設(shè)計方案完成了試驗裝置，進行了試驗研究。 關(guān)鍵詞： 繞組熱點溫度；光纖光柵；在線監(jiān)測；分布式光纖傳感器；單片機 Power transformer online monitoring and diagnosis Abstract Along with the rapid development of economy in our country, the level of power grid operation in our country are also constantly improve, power system of power transformer is one of the most important and most expensive equipment, its reliability is directly related to the power grid is safe, efficient and economic operation. Most of the end of the transformer life because it lost its insulating ability, is the most important factors which affect the ability of the insulation transformer winding temperature at runtime. If transformer winding at runtime the hot spot temperature is too low, the ability of the transformer is underutilized, reduced economic efficiency, and the hot spot temperature is too high, will not only affect the service life of the transformer, will also pose a threat to the safe operation of the transformer. Power transformer internal belong to high voltage and strong electromagic environment, for the transformer winding temperature monitoring, fiber Bragg grating sensing technology pared with the traditional electrical sensor technology has inparable advantages, particularly suitable for power transformer internal plex electromagic environment. Application of distributed fiber optic sensor system are studied in this paper, mainly including two aspects. First of all, analyzed deeply and in detail the principle of distributed optical fiber temperature sensor system。 Analysis of the current optical fiber temperature measurement in the world advanced technology and scientific research, based on the anti stokes Raman scattering and stokes light intensity is more technology, from the perspective of the space resolution and temperature, bined with the actual situation make the feasible method of this system. Secondly the system each part based on the physical formula is derived, with variable to optimize the system each part of the building。 Will eventually be a plex system is deposed into relatively simple, is advantageous to the we use part of the hardware and software implementation. Second, clear the principles of system implemented on the basis of the system of optical fiber part such as sampling and the software behind the operation, according to the design pleted test rig, is researched. Keyword: Winding hot spot temperature。 Fiber Bragg grating。 Online monitoring。Distributed optical fiber sensor。 Single chip microputer 目錄 摘要 Ⅰ Abstract Ⅱ 第一章 緒 論 錯誤 !未定義書簽。 本論文的背景和意義 錯誤 !未定義書簽。 本論文的主要方法和研究進展 錯誤 !未定義書簽。 本論文的主要內(nèi)容 錯誤 !未定義書簽。 本論文的結(jié)構(gòu)安排 錯誤 !未定義書簽。 第二章 各章題序及標題小 2 號黑體 錯誤 !未定義書簽。 各節(jié)點一級題序及標題小 3 號黑體 錯誤 !未定義書簽。 各節(jié)的二級題序及標題 4 號黑體 錯誤 !未定義書簽。 頁眉、頁腳說明 錯誤 !未定義書簽。 段落、字體說明 錯誤 !未定義書簽。 公式、插圖和插表說明 錯誤 !未定義書簽。 結(jié)論