【摘要】：繼電保護(hù)系統(tǒng)現(xiàn)在已經(jīng)成為了電力系統(tǒng)中不可或缺的一部分,一旦在電力系統(tǒng)的運(yùn)行過(guò)程中出現(xiàn)故障或異常狀況,繼電保護(hù)系統(tǒng)的重要性就會(huì)顯露無(wú)疑。現(xiàn)階段我國(guó)的電網(wǎng)和電廠(chǎng)的運(yùn)行狀態(tài)都伴隨著電力工業(yè)的飛速發(fā)展而同時(shí)發(fā)生著翻天覆地的變化,那么為了保障電力系統(tǒng)的安全可靠運(yùn)行,實(shí)現(xiàn)繼電保護(hù)的四項(xiàng)基本要求,就需要繼電保護(hù)專(zhuān)業(yè)的硬件技術(shù)和技術(shù)理論也同步提高。可以實(shí)現(xiàn)正確合理動(dòng)作的繼電保護(hù)裝置可以將事故消除在萌芽階段防止其進(jìn)一步擴(kuò)大,也能保護(hù)電氣一次設(shè)備的安全。作為發(fā)電廠(chǎng)內(nèi)最為重要的電氣主設(shè)備,發(fā)電機(jī)的結(jié)構(gòu)顯得十分復(fù)雜且造價(jià)高昂,所以對(duì)于配置在發(fā)電機(jī)中的相關(guān)保護(hù)配置也一直都是最為復(fù)雜的,只有通過(guò)合理的繼電保護(hù)整定計(jì)算和對(duì)保護(hù)系統(tǒng)的正確配置,才能提高發(fā)電機(jī)的安全運(yùn)行并在出現(xiàn)事故時(shí)將損失降到最低。隨著經(jīng)濟(jì)建設(shè)的發(fā)展,我國(guó)電網(wǎng)的單機(jī)裝機(jī)容量也在飛速增大,我國(guó)現(xiàn)階段存在于電力系統(tǒng)中的主力發(fā)電機(jī)組里600MW的燃煤機(jī)組依舊占據(jù)主導(dǎo)地位。因此,對(duì)于分析裝機(jī)容量為600WM的燃煤式火電廠(chǎng)中所配置的繼電保護(hù)裝置,總結(jié)在其中出現(xiàn)的問(wèn)題并給出修改建議,仍然具有普遍研究意義。本文以大唐國(guó)際王灘電廠(chǎng)在運(yùn)的兩臺(tái)600MW燃煤式火力發(fā)電廠(chǎng)做為研究主體,通過(guò)考察其電氣系統(tǒng)參數(shù)與配置情況,討論所涉及到的繼電保護(hù)相關(guān)內(nèi)容。在論文中會(huì)先從分析我國(guó)現(xiàn)行的火力發(fā)電廠(chǎng)中所使用的繼電保護(hù)系統(tǒng)現(xiàn)狀入手,了解并總結(jié)出火力發(fā)電廠(chǎng)中繼電保護(hù)專(zhuān)業(yè)的基本要求,尤其是關(guān)于發(fā)電機(jī)變壓器組和廠(chǎng)用電系統(tǒng)中對(duì)繼電保護(hù)系統(tǒng)的共性配置要求,然后結(jié)合王灘電廠(chǎng)的發(fā)變組系統(tǒng)和廠(chǎng)用電系統(tǒng)的時(shí)機(jī)特點(diǎn),依照相關(guān)繼電保護(hù)整定要求,討論所涉及到的各項(xiàng)保護(hù)的定值計(jì)算方法。最后通過(guò)對(duì)王灘電廠(chǎng)在實(shí)際運(yùn)行過(guò)程中發(fā)現(xiàn)的一些問(wèn)題,提出合理化建議,最后基于對(duì)一些難題的思考,對(duì)繼電保護(hù)技術(shù)的發(fā)展進(jìn)行一定的猜測(cè)和討論。
[Abstract]:The relay protection system has become an indispensable part of the power system. Once there are faults or abnormal conditions in the operation of the power system, the importance of the relay protection system will be revealed. At the present stage, the operation state of power grid and power plant in our country is accompanied by the rapid development of power industry and at the same time has undergone earth-shaking changes. In order to ensure the safe and reliable operation of the power system, the four basic requirements of relay protection are realized. The hardware technology and technical theory of relay protection need to be improved simultaneously. The relay protection device, which can realize the correct and reasonable operation, can prevent the accident from expanding further in the embryonic stage, and can also protect the safety of the electrical primary equipment. As the most important electrical main equipment in the power plant, the structure of the generator is very complex and the cost is very high, so the configuration of the related protection in the generator has always been the most complex. Only through reasonable relay protection setting calculation and the correct configuration of the protection system can the safe operation of the generator be improved and the loss be reduced to the minimum in the event of accident. With the development of economic construction, the installed capacity of power grid in China is increasing rapidly, and the coal-fired units of 600MW still occupy the leading position in the main generating units of power system in our country at the present stage. Therefore, it is of general significance to analyze the relay protection devices in coal-fired power plants with installed capacity of 600WM, summarize the problems and give some suggestions for modification. This paper takes two 600MW coal-fired thermal power plants in operation of Datang International Wangtan Power Plant as the main research body, and discusses the relaying protection related to the electrical system parameters and configuration. In this paper, the author first analyzes the current situation of relay protection system used in thermal power plants in our country, and summarizes the basic requirements of relay protection in thermal power plants. Especially about the common configuration requirements of relay protection system in generator and transformer set and auxiliary power system, and then according to the relevant relay protection setting requirements according to the timing characteristics of generating and transformer group system and auxiliary power system in Wangtan Power Plant. The method of calculating the fixed value of each protection involved is discussed. Finally, through some problems found in the actual operation of Wangtan Power Plant, some reasonable suggestions are put forward. Finally, based on the consideration of some difficult problems, the development of relay protection technology is speculated and discussed.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM621;TM77

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本文編號(hào)：2201061