摘要
论文根据大型机组的故障特点，结合相关的国标和部标，制定了对大型机组故障录波的基本要求，对录波量、录波时间等重要技术指标作了规定。
研制了大型机组故障录波的硬件系统结构——数据采样和处理机与分析机二级结构。开发了16位16通道同时采样高速A／D卡，解决了数据采集中高精度、高速度的难题。
论证了大型机组故障录波启动判据算法，因录波数据中含有谐波分量，基于单一频率的各种算法不能采用，选择了全周波富氏算法，但其计算量太大，提出的全周波富氏递推算法精度高、计算量小。
详细研究了发电机定子绕组匝间和相间短路的电气关系，理论计算和实用计算方法。采用发电机自感抗和互感抗的分析计算，自感抗和负感抗的计算非常复杂，本文采用了利用发电机常用参数的实用计算作为机组故障诊断的理论基础。在此基础上，首次提出用录波数据对定子绕组匝间短路和相间短路进行故障诊断，确定故障点在定子绕组上的相别和匝数α，有创新、有实用价值。
录波装置样机已在贵州金沙电厂12.5万瓦机组上投入生产运行，效果良好。
In this thesis, the basic requirement and hardwar system strUCtUr of large-sized
generator fault recorder are presented according to the fault feat[lf of large-sized genebor.
A l6 bits Mi board H l6 chaxmels high speed synchronous saxnPling is developed. A
new recursive DFT algorithIn is submitted, and the problem of high accuray and SPeed are
solved.
The electrical relation of Phase-phase and intris fault of generator stator windngs is
studied in detal. Based on the result, the fault diagnostication according to fault record
data and locating the fault position of Staor wtndings are put forwar for the first time, it is
innovative and practical.
The fault recorder based on the thesis has been successfully produced, and it is
operating and working well.
引文
[1] 王维俭等，大型机组继电保护理论基础．北京：水利电力出版社，1989．
[2] 高景德，王祥衍，李发海．交流电机及其系统的分析．北京：清华大学出版社，1993．
[3] Megahed A I, Malik O P. Synchronous Generator Internal Fault Computation and Experimental Verification IEE Proceedings Generation Transmission and Distribution 1798, 145(5).
[4] 许宪章．交流电机的绕组理论．北京：机械工业出版社，1985．
[5] 贺益康．交流电机的计算机仿真．北京：科学出版社，1990．
[6] 屠黎明等．基于绕组函数的凸极同步电机电感参数计算．电力系统自动化，2000，4．
[7] 周德贵，巩北宇．同步发电机运行技术与实践．北京：中国电力出版社，1995．
[8] 王维俭．电气主设备继电保护原理及应用．北京：中国电力出版社，1996．
[9] 张旭东．不同原理的发电机失磁保护误动分析与改进．电力系统自动化，2001，6．
[10] 王维俭，刘俊宏．大型发电机中性点接地方式选择．电网技术，1995第2期．
[11] 王维剑，刘俊宏．大型发电机中性点接地方式与定子接地保护灵敏度关系的分 析计算．电力自动化设备，1995，第3期．
[12] 李振华，王维俭．单元件发电机内部短路保护的研究．电力自动化设备，1994，第2期．
[13] 史世文．大机组继电保护，北京：水利电力出版社，1987．
[14] Roemish W R, Wall E T. A. New synchronous Generator Out-of-step Relay Scheme IEEE PAS. 1985, 104(3).
[15] Taylor CW, etc A New Ont-of-step with Rate of Change of Apparent Resistance Augmentation IEEE PAS, 1983, 102(3).
[16] 李玉梅等．三次谐波式定子接地保护几个问题的探讨．电力自动化设备，1993第1期．
[17] 王维俭等．岩滩电站SF302．5-80／17000发电机内部短路计算及保护灵敏度分析．电力自动化设备，1990，第1期．
[18] 张龙照等．同步电机定子绕组内部故障规律探讨．电工技术学报，1991，第1期．
[19] 屠黎明等．发电机定子绕组内部故障分析方法．电力系统自动化，2001，21．
[20] 伍叶凯．发电机定子匝间短路保护方案的研究．电网技术，1998，9．
[21] 贾志东等．发电机定子主绝缘老化特征的研究．电网技术，2000，4．
[22] 屠黎明等．汽轮发电机内部故障回路电气参数的计算方法．电力系统自动化，2001，16．
[23] 王祥衍．发电机内部短路分析研究最新进展． 电力系统自动化， 1999，23(11)：10～12．
[24] 侯煦光，杨顺义．汽轮发电机定子绕组开焊故障的计算分析，电站设备自动化， 1981(3)：6～18．
[25] 王维俭．大型汽轮发电机内部短路保护的定值分析．继电器，1980(4)。
[26] Rhudy R G, Snively H D, White J C. Performance of Synchronous Machines Operating with Unbalanced Armature Windings. IEEE Trans on EC, 1988, 3(2): 391～397.
[27] Fudeh H R, Ong C M. Modeling and Analysis of Induction Machines Containing Space Harmonics, Part Ⅰ, Ⅱ,Ⅲ. IEEE Trans on PAS, 1983, 102(8): 2608～2628.
[28] Megahed A I, Malik O P. Synchronous Generator Internal Fault Computation and Experimental Verification. IEE Proceedings—Generation, Transmission and Distribution, 1998, 145(5): 604～610.
[29] Nyamusa T A, Demerdash N A. Transient Analysis of Partial Armature Short-Circuit in an Electronically Commutated Permanent Magnet Motor System Using an Integrated Nonlinear Magnetic Field-Network Model. In: IEEE/PES Winter Meeting. New York (USA): 1986.
[30] Davat B, Ren Z, Lajoie-Mazenc M. The Movement in Field Modeling. IEEE Trans on Magnetics, 1985, 21(6): 2296～2298.
[31] 屠黎明．同步发电机定子绕组内部故障分析方法及其应用的研究：[博士学位论文]．南京：东南大学，1999．
[32] Kulig T S, Buchley G W, Lambtecht D, et al. A New Approach to Determine Transient Winding and Damper Currents in Case of Internal and External Faults and Abnormal Operation, Part Ⅰ: Fundamentals. In: IEEE/PES Winter Meeting. New Orleans (USA): 1986.
[33] A. G, Phadke, A Microlomputer Based Symmetrical Component Distance Relay, 1979 Power Indusiry Computer Application Sconference.
[34] M. S. Sachdev, M. A. Baribeav, A New Alcorithm for Digital Impedance Relay, IEEE Pas Vol-98, No. 6, 1979.
[35] A. G. Phadky Fellow, A New Measurement Technique for Tracking Voltage Phasor, Localsystem Freqency, and Rate of Change of Frequency, IEEE Transations on Power Apparatus and Systems, Vol. Pas. 102, No,5, May 1983.
[36] G. Missout, P. Girard, Measurement of Bus Voltage Angle Between Montreal and Sepi-iles, IEEE Trans on Pas, March/April 1980, PP. 536-539.
[37] E. Oran Brigham, The Fast Fourier Tranform (Book), Prentice Hall, 1974.
[38] A. G. Phadke, M. Ibrahim, T. Hlibka, Fundamental Basis for Distance Relaying With Symmetrical Components, IEEE Trans. on Pas, Vol, Pas 98, No.2, PP635-648, March/April 1977.
[39] Mask S T. TWACS: A power line Communication technology for power distribution Network control and monitoring 1986 Tpwrd-1; 66-72.
[40] Storer, James A. Data Compression; Method and Theory. Computer Science press, 1988.
[41] D. S. Ornstein and B. Weiss, Entropy and data compression Schemes, IEEE Trans 1T-39(2), 520-524(1993).
[42] 吴乐南．数据压缩的原理与应用．电子工业出版社，1995．
[43] 戴善荣．数据压缩．西安电子科技大学，1989．
[44] Kulig T S, Buckley G W, Lambrecht D, et al. A New Approach to Determine Transient Generator Winding and Damper Currents in Cases of Internal and External Faults and Abnormal Operation (Ⅲ) Results. IEEE, 1990, EC-3: 70～78.
[45] Toliyat H A, Lipo T A. Transient Analysis of Cage Induction Machines Under Stator, Rotor Bar and End Ring Faults. IEEE, 1995, EC: 241～247.