本文關(guān)鍵詞： 變壓器保護(hù) 定值計(jì)算 保護(hù)調(diào)試 電力系統(tǒng)　出處：《中國(guó)海洋大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：在電力系統(tǒng)中，變電站是電力系統(tǒng)中的重要組成元素。而在變電站中，變壓器又是這個(gè)元素中的核心單元，所以變壓器能否正常、穩(wěn)定運(yùn)行直接關(guān)系到整個(gè)電力系統(tǒng)的穩(wěn)定。目前隨著社會(huì)用電量的不斷增加，變壓器的容量也隨之不斷增大，為了保證變壓器的正常穩(wěn)定運(yùn)行，，我們對(duì)變壓器保護(hù)有了更高的要求。 變壓器保護(hù)是保護(hù)電力變壓器安全和防止電力系統(tǒng)長(zhǎng)時(shí)間大面積停電的最基本、最重要、最有效的技術(shù)手段。許多實(shí)例表明，變壓器保護(hù)裝置一旦不能正確動(dòng)作，就會(huì)擴(kuò)大事故，釀成嚴(yán)重后果。因此，加強(qiáng)變壓器的保護(hù)設(shè)計(jì)、定值整定和保護(hù)調(diào)試，是保證變壓器本體安全以及電網(wǎng)安全的重要工作。本文就以110kV馮家變電站為例，來(lái)研究一個(gè)常規(guī)降壓變電站變壓器保護(hù)。 本課題的研究?jī)?nèi)容是設(shè)計(jì)一個(gè)常規(guī)110kV降壓變電站變壓器保護(hù)系統(tǒng)。系統(tǒng)包括以下幾部分：作為變壓器主保護(hù)的變壓器非電量保護(hù)和差動(dòng)保護(hù)的設(shè)計(jì)、整定和調(diào)試，以及作為變壓器后備保護(hù)的變壓器過(guò)流、接地保護(hù)的設(shè)計(jì)、整定和調(diào)試。其中作為變壓器主保護(hù)的差動(dòng)保護(hù)是本文研究的重點(diǎn)內(nèi)容。差動(dòng)保護(hù)由差動(dòng)速斷保護(hù)和比率差動(dòng)保護(hù)組成，主要反應(yīng)變壓器內(nèi)部、外部故障，作為變壓器的電氣量主保護(hù)，其性能直接決定變壓器保護(hù)的性能。差動(dòng)保護(hù)的章節(jié)中首先對(duì)現(xiàn)有的變壓器差動(dòng)保護(hù)基本原理和動(dòng)作原理做了簡(jiǎn)單介紹，其次重點(diǎn)分析了正常狀態(tài)下產(chǎn)生不平衡電流的原因以及消除正常不平衡電流的辦法，最后詳細(xì)講解了變壓器差動(dòng)保護(hù)定值的整定規(guī)則和差動(dòng)保護(hù)的調(diào)試方法。
[Abstract]:In power system, substation is an important element in power system. In substation, transformer is the core unit of this element, so whether the transformer is normal or not, The stable operation is directly related to the stability of the whole power system. At present, with the increasing of the power consumption, the capacity of the transformer is also increasing. In order to ensure the normal and stable operation of the transformer, We have higher requirements for transformer protection. Transformer protection is the most basic, important and effective technical means to protect power transformer safety and prevent power system from power system power outages for a long time. Many examples show that once transformer protection device can not be operated correctly, Therefore, it is important to strengthen transformer protection design, value setting and protection debugging to ensure transformer body safety and power network safety. This paper takes 110 kV Fengjia substation as an example. To study the transformer protection of a conventional substation. The research content of this subject is to design a conventional 110 kV transformer protection system in step-down substation. The system includes the following parts: the design, setting and debugging of transformer non-electric protection and differential protection as main protection of transformer, As well as the design of transformer overcurrent and earthing protection as transformer backup protection, The differential protection, which is used as the main protection of transformer, is the main content of this paper. The differential protection is composed of differential protection and ratio differential protection, which mainly reflects the internal and external faults of transformer. As the main electrical protection of transformer, its performance directly determines the performance of transformer protection. In the chapter of differential protection, the basic principle and operation principle of transformer differential protection are introduced briefly. Secondly, the causes of unbalance current under normal condition and the method to eliminate the unbalance current are analyzed. Finally, the setting rules of transformer differential protection and the debugging method of differential protection are explained in detail.
【學(xué)位授予單位】：中國(guó)海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM63;TM774

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本文編號(hào)：1501933