变压器微机保护设计.rar

摘要 1
第一章绪论 6
1.1选题的目的和意义 6
1.2变压器保护的要求及特点 6
1.2.1变压器保护的要求 6
1.2.2计算机变压器保护的特点 7
1.3变压器保护原理的分析 8
1.4国内外研究综述 9
1.5变压器保护存在的主要问题 10
第二章变压器保护的基本常识 12
2.1变压器模型 12
2.1.1双绕组单相变压器 12
2.1.2YN，d连接的变压器 13
2.2变压器的故障 15
2.3变压器保护运用比例制动电流差动保护需要解决下面几个问题 17
第三章励磁涌流判据的研究现状 19
3.1当前得到实际应用的励磁涌流判据 19
3.2 尚处于实验阶段的涌流判据 20
3.3磁涌流判据的发展方向 24
第四章励磁涌流判据的提出 26
4.1单相变压器励磁涌流分析 26
4.2三相变压器励磁涌流分析 28
4.3励磁涌流分析总结 30
第五章涌流判据数字仿真 32
5.1仿真过程介绍 32
5.2仿真模型建立 33
5.3保护算法 33
5.3.1傅氏算法 34
5.3.2差分滤波 35
5.3.3电压电流幅值算法 36
5.3.4正序分量滤波算法 37
5.3.5傅氏功率算法 38
5.4仿真图形 38
5.4.1变压器励磁涌流仿真 38
5.4.2变压器故障仿真 39
5.5仿真结论 44
第六章微机保护装置的硬件电路原理 45
6.1硬件装置概述 45
6.2保护模块软件设计 46
6.2.1保外RAM自检有两种方法 46
6.2.2保护CPU采样中断子程序 48
6.2.3故障处理子程序 50
第七章提高微机保护装置可靠性的措施 52
7.1微机保护装置的硬件抗干扰措施 52
7.2微机保护装置的软件抗干扰措施 53
7.2.1利用软件循环自检检查微机系统的硬件故障 53
7.2.2数据采集系统的检查 54
7.2.3其他软件抗干扰措施 54
第八章主要参考文献与资料获得情况 55

摘要
本文针对现有变压器继电保护装置在实现方法和工作原理上存在的缺陷，考虑间断角和二次谐波制动原理，提出一种新的正序有功功率差的励磁涌流判据，改进了变压器微机保护算法，对单相和三相变压器进行了具体励磁涌流的分析。建立了变压器励磁涌流判据数字仿真模型和故障仿真模型，针对变压器不同故障状态进行仿真分析，结果表明，本文提出的励磁涌流判据能够有效判定空载合闸和故障恢复后合闸时发生的励磁涌流，且具有较高的灵敏度。开发研制了变压器微机保护装置并进行了试验。试验结果验证了所提判据的正确性和整体保护方案的可行性。

关键词：变压器保护，励磁涌流，二次谐波制动，间断角，微机保护装置

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