摘要 1
第一章緒論 6
1.1選題的目的和意義 6
1.2變壓器保護(hù)的要求及特點(diǎn) 6
1.2.1變壓器保護(hù)的要求 6
1.2.2計(jì)算機(jī)變壓器保護(hù)的特點(diǎn) 7
1.3變壓器保護(hù)原理的分析 8
1.4國(guó)內(nèi)外研究綜述 9
1.5變壓器保護(hù)存在的主要問(wèn)題 10
第二章變壓器保護(hù)的基本常識(shí) 12
2.1變壓器模型 12
2.1.1雙繞組單相變壓器 12
2.1.2YN，d連接的變壓器 13
2.2變壓器的故障 15
2.3變壓器保護(hù)運(yùn)用比例制動(dòng)電流差動(dòng)保護(hù)需要解決下面幾個(gè)問(wèn)題 17
第三章勵(lì)磁涌流判據(jù)的研究現(xiàn)狀 19
3.1當(dāng)前得到實(shí)際應(yīng)用的勵(lì)磁涌流判據(jù) 19
3.2 尚處于實(shí)驗(yàn)階段的涌流判據(jù) 20
3.3磁涌流判據(jù)的發(fā)展方向 24
第四章勵(lì)磁涌流判據(jù)的提出 26
4.1單相變壓器勵(lì)磁涌流分析 26
4.2三相變壓器勵(lì)磁涌流分析 28
4.3勵(lì)磁涌流分析總結(jié) 30
第五章涌流判據(jù)數(shù)字仿真 32
5.1仿真過(guò)程介紹 32
5.2仿真模型建立 33
5.3保護(hù)算法 33
5.3.1傅氏算法 34
5.3.2差分濾波 35
5.3.3電壓電流幅值算法 36
5.3.4正序分量濾波算法 37
5.3.5傅氏功率算法 38
5.4仿真圖形 38
5.4.1變壓器勵(lì)磁涌流仿真 38
5.4.2變壓器故障仿真 39
5.5仿真結(jié)論 44
第六章微機(jī)保護(hù)裝置的硬件電路原理 45
6.1硬件裝置概述 45
6.2保護(hù)模塊軟件設(shè)計(jì) 46
6.2.1保外RAM自檢有兩種方法 46
6.2.2保護(hù)CPU采樣中斷子程序 48
6.2.3故障處理子程序 50
第七章提高微機(jī)保護(hù)裝置可靠性的措施 52
7.1微機(jī)保護(hù)裝置的硬件抗干擾措施 52
7.2微機(jī)保護(hù)裝置的軟件抗干擾措施 53
7.2.1利用軟件循環(huán)自檢檢查微機(jī)系統(tǒng)的硬件故障 53
7.2.2數(shù)據(jù)采集系統(tǒng)的檢查 54
7.2.3其他軟件抗干擾措施 54
第八章主要參考文獻(xiàn)與資料獲得情況 55

摘要
本文針對(duì)現(xiàn)有變壓器繼電保護(hù)裝置在實(shí)現(xiàn)方法和工作原理上存在的缺陷，考慮間斷角和二次諧波制動(dòng)原理，提出一種新的正序有功功率差的勵(lì)磁涌流判據(jù)，改進(jìn)了變壓器微機(jī)保護(hù)算法，對(duì)單相和三相變壓器進(jìn)行了具體勵(lì)磁涌流的分析。建立了變壓器勵(lì)磁涌流判據(jù)數(shù)字仿真模型和故障仿真模型，針對(duì)變壓器不同故障狀態(tài)進(jìn)行仿真分析，結(jié)果表明，本文提出的勵(lì)磁涌流判據(jù)能夠有效判定空載合閘和故障恢復(fù)后合閘時(shí)發(fā)生的勵(lì)磁涌流，且具有較高的靈敏度。開(kāi)發(fā)研制了變壓器微機(jī)保護(hù)裝置并進(jìn)行了試驗(yàn)。試驗(yàn)結(jié)果驗(yàn)證了所提判據(jù)的正確性和整體保護(hù)方案的可行性。

關(guān)鍵詞：變壓器保護(hù)，勵(lì)磁涌流，二次諧波制動(dòng)，間斷角，微機(jī)保護(hù)裝置

Abstract
This text aims at the tiny machine transformer protection proceeded the thorough research combined to do the creative result.Aim at the current transformer to protect after the electricity existent in realizing method with working principle of blemish, put forward to flow out to flow to judge with the excitation for the very first time according to with interrupted the Cape, two times wave system moves the principle combines adoption two principles to method that constitute and realize, develop to research to manufacture the protection equip to combine proceeding experiment.Experimenting the result verifies an accuracy for lifting principle with protect the possibility of the project of the whole.The main contents of the thesis is as follows:
1、 speak the protective meaning in tiny machine in transformer first, then again systematically protective development in tiny machine in transformer in overview history with present condition.
2、 say the model that said the basic common sense in transformer with the breakdown that transformer exsits.
3、 spoke first the current excitation flow out to flow the application that judge according to in actually, then analyze to be placed in to experiment the stage flow out to flow to judge according to, put forward later on the excitation excitation flow out the concrete development direction that flow judges according to.
4、 proceeded to the transformer the concrete excitation flow out the analysis that flow, including single mutually with three mutually transformer.
5、according to ex- the analysis of several chapters, this chapter flows out to flow to judge to the transformer excitation to imitate according to the arithmetic figure the true reallying break down to imitate with the transformer.And analyze in imitate truely of a few and familiar half wave with a calculate way, the other party face judge the method proceeded the point the analysis, design protection software.
6、 this main according to above the analysis on the principle, proceed the in a specific way tiny machine hardware is last with the software how to realizes in a specific way.Put forward finally at increase the tiny machine protection equip the some dependable and last measure.

Key words： the excitation flows out to flow; two times wave system moves: Interrupted the Cape: Tiny machine protection Device