(3.236.214.19) 您好!臺灣時間:2021/05/06 20:20
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:陳嘉鴻
研究生(外文):Chya-Hung Chen
論文名稱:比流器飽和偵測與飽和電流修正技術之研究
論文名稱(外文):Research on Techniques for Detection of Current Transformer Saturation and Correction of Saturation Current
指導教授:林穎宏林穎宏引用關係
學位類別:碩士
校院名稱:長榮大學
系所名稱:經營管理研究所
學門:商業及管理學門
學類:企業管理學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:74
中文關鍵詞:指數衰減直流成份比流器飽和偵測比流器飽和電流修正數位保護電驛
外文關鍵詞:Exponentially decaying DC offsetDetection of CT SaturationCorrection of CT Saturation CurrentDigital Protection Relay
相關次數:
  • 被引用被引用:1
  • 點閱點閱:337
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
電力系統之輸電線故障電流常含有大量指數衰減直流成份,易造成比流器飽和而引起二次側電流扭曲,進而使數位保護電驛誤動作或動作延遲。本文提出比流器飽和偵測技術與飽和電流修正技術,在比流器飽和偵測技術中,根據比流器二次側電流於飽和開始與結束時皆有一明顯之轉折點,使用離散小波轉換以萃取特徵進而判定比流器飽和。對於所提出之比流器飽和電流修正技術,其藉由比流器無飽和時之二次側電流取樣值以估測故障電流之數學模型參數,可於比流器飽和時以波形合成方式產生電流波形以修正飽和電流。本文利用Matlab/Simulink模擬器以驗證所提出之演算法,模擬結果顯示所提演算法可正確判定比流器飽和,且可大幅降低因比流器飽和所造成之電流誤差。
The fault currents caused by transmission line faults in power system contain considerable exponentially decaying DC offset. Moreover, the CT tends to saturation due to DC offset, and the secondary current is distorted when saturation occurs. Such saturation current gives rise to mal-operation or delayed trip in digital protection relays. In this thesis, techniques for detection of CT saturation and correction for saturation current are proposed. Due to the obvious inflection points of secondary current at start and end of CT saturation, the proposed detection technique applies discrete wavelet transform to extract the features and then identifies the CT saturation. For the correction technique, the samples of unsaturated secondary current are used to estimate the parameters of mathematic model of fault current. Furthermore, the estimated parameters are utilized to synthesize the current waveform for correcting the saturated current. In this thesis, Matlab/Simulink simulator is used to verify the proposed algorithm. Simulation results show that the proposed algorithms are effective to identify CT saturation and the error of secondary current caused by CT staturation reduces significantly.
摘要 I
Abstract II
目錄 III
圖目錄 V
表目錄 X
第一章 緒論 1
第一節 研究背景與動機 1
第二節 文獻回顧 3
第三節 研究貢獻 5
第四節 論文內容概述 6
第二章 比流器飽和偵測與飽和電流修正技術 7
第一節 前言 7
第二節 比流器介紹 9
一、 比流器的構造 10
二、 比流器的等效電路 11
三、 比流器的標準 13
四、 比流器模型之測試 13
第三節 比流器飽和偵測演算法 18
一、 小波轉換介紹 18
二、 比流器飽和偵測 25
第四節 比流器飽和電流修正演算法 29
一、 最小誤差平方法與波型合成介紹 29
二、 比流器飽和電流修正 30
第三章 演算法模擬驗證結果 36
第一節 模擬驗證環境介紹 36
第二節 模擬驗證結果 38
一、 模擬案例:A相接地故障(故障投入角= ; ) 38
二、 模擬案例:A相接地故障(考慮二次側有一低通濾波器) 43
三、 模擬案例:A相接地故障(故障投入角= ; )47
四、 模擬案例:A相接地故障(故障投入角= ; )51
五、 模擬案例:A相接地故障(故障投入角= ; )55
六、 模擬案例:三相短路故障(故障投入角= ; ) 59
七、 模擬案例:A相接地故障(故障投入角= ; ) 63
八、 模擬案例:A相接地故障(故障投入角= ; ) 67
第四章 結論與未來研究方向 71
參考文獻 72
[1]陳壽孫、羅靜儀、石金福、楊金石、蒲冠志,『電力系統分析-輸配電學』,新文京開發出版,民國九十三年。
[2]陳清山,『基於同步量測及適應性濾波技術之輸電線數位保護電驛與故障定位演算法之設計』,國立台灣大學電機工程研究所博士論文,民國九十二年。
[3]M. S. Sachdev (Coordinator), Advancements in Microprocessor-based Protection and Communication, IEEE Tutorial Course Text, 97TP120-0,1997.
[4]Working Group F-8 of the Relay Input Sources Subcommittee of the IEEE Power System Relaying Committee, "Digital Simulator Performance Requirements for Relay Testing," IEEE Transactions on Power Delivery, Vol-l3, No. 1, January 1998, pp. 78-84.
[5]IEEE C37.111-l996, "IEEE Standard Format for Transient Data Exchange (COMTRADE) for Power Systems", 1996.
[6]李宏任,『實用保護電驛(修訂版)』,全華科技圖書,民國八十九年。
[7]An IEEE Power System Relay Committee Report, “Gapped Core Current Transformer Characteristics and Performance,” IEEE Transactions on Power Delivery, Vol. 5, No. 4, November 1990, pp. 1732-1740.
[8]Vincent Molcrette, Jean-Luc Kotny, Jean-Paul Swan and Jean-Francois Brudny, “Reduction of Inrush Current in Single-phase Transformer Using Virtual Air Gap Technique,” IEEE Transactions on Magnetics, Vol. 34, No. 4, July 1998, pp.1192-1194.
[9]A. G. Phadke and J. S. Thorp, Computer Relaying for Power Systems, Research Studies Press Ltd., 1988, pp. 185–186.
[10]Y. C. Kang, S. H. Ok, S. H. Kang, “A CT Saturation Detection Algoruthm,” IEEE Transactions on Power Delivery, Vol. 19, No. 1, Jan. 2004, pp. 78–85.
[11]Y. C. Kang, J. K. Park, S. H. Kang, A. T. John and R. K. Aggarwal, “An algorithm for compensation the secondary current of current transformer,” IEEE Transactions on Power Delivery, Vol. 12, Jan. 1997, pp. 116–124.
[12]T. Bunyagul, P. Crossley and P. Gale, “ Overcurrent protection using signals derived from saturated measurement CTs,” IEEE Power Engineering Society Summer Meeting, Vancouver, BC, Canada, July, 2001.
[13]C. F., “An impedance-based CT saturation detection algorithm for bas-bar differential protection,” IEEE Transactions on Power Delivery, Vol. 16, Oct. 2001, pp. 468–472.
[14]M. Poliak, N. Kolibas, “Computation of Current Transformer Transient Performance,” IEEE Transactions on Power Delivery, Vol. 3, No. 4, October1988, pp. 1816-1822.
[15]D. O’Kelly, “Calculation of the Transient Performance of Protective Current Transformers Including Core Hysteresis,” IEEE Proceedings-C, Vol. 139, No. 5,September 1992, pp. 455-460.
[16]Luis G. Perez, Alfred J. Flechsig, Jack L. Meador, Zoran obradovic, “Training an Artificial Neural Network to Discriminate Between Magnetizing Inrush and Faults,” IEEE Transactions on Power System, Vol. 9, No. 1, 1994, pp. 434-441.
[17]H. S. Bronzeado, P. B. Brongan, R. Yacamini, “Harmonic analysis of transient currents during sympathetic interaction,” IEEE Transactions on Power System, Vol. 11, No. 4, 1996, pp. 2051-2056.
[18]Norman T. Stringer, “The Effect of DC Offset on Current-Operated Relays,” IEEE Transactions on Industry Applications, Vol. 34, No. 1, January 1998, pp. 30-34.
[19]劉建志,『諧波對比流器及變壓器用之差動電驛的影響分析』,中原大學電機工程研究所碩士論文,民國八十七年。
[20]L.Satish, “Short-time Fourier and Wavelet Transforms for Fault Detection in Power Transformers During Impulse Tests,” IEE Proceedings-Science Measurement Technology, Vol. 145, No. 2, March 1998, pp. 77-84.
[21]W.A. Wilkinson and M.D. Cox, "Discrete Wavelet Analysis of Power System Transients," IEEE Transactions on Power System, Vol. 11, No. 4, pp. 2038-2044, November 1996.


[22]L. Angrisani, P. Daponte, D. Apuzzo, A. Testa, " A Measurement Method Based on the Wavelet Transforms for Power Quality Analysis," IEEE Transactions on Power Delivery, Vol. 13, No. 4, pp. 990-998, October 1998.
[23]O. Xu, A. Refsum, R.Watson, “Application of External Compensation to Current Transformers,” IEE Proceedings -Measurement Technology, Vol. 143, No. 2, March 1996, pp. 147-150.
[24]A. T. Johns, “An Algorithm for Compensation Secondary Currents of Current Transformers,” IEEE Transactions on Power Delivery, Vol. 12, No.1, January 1997, pp.116-124.
[25]Nicola Locci and Carlo Muscas, “A Digital Compensation Method for Improving Current Transformer Accuracy,” IEEE Transactions on Power Delivery, Vol. 15, No.4, October 2000, pp.1104-1109.
[26]Nicola Locci and Carlo Muscas, “Hysteresis and eddy Currents Compensation in Current Transformer,” IEEE Transactions on Power Delivery, Vol. 16, No.2, April 2001, pp.154-159.
[27]Jiuping Pan, Khoi Vu and Yi Hu, “An Efficient Compensation Algorithm forCurrent Transformer Saturation Effects, ” IEEE Transactions on Power Delivery, Vol. 19, No. 4, October 2004, pp. 1623-1628.
[28]”Requirement for instrument transformer”, IEEE Std C37.110-1996.
[29]”IEEE Guide for the Application of Current Transformers Used for Protective Relaying Purposes,” IEEE Std C37.110-1996.
[30]李宏任,『電機設備保護(修訂版)』,全華科技圖書,民國八十七年。
[31]林義讓、林清樺,『電機設備保護』,全華科技圖書,民國七十九年。
[32]Y. C. Kang, U. J. Lim, S. H. Kang and P. A. Crossley, “Compensation of the distortion in the secondary current caused by saturation and remanence in a CT,” IEEE Transactions on Power Delivery, Vol.19, No. 4, Oct. 2004, pp. 1642-1649.
[33]N. Weyrich, Gregory T. Warhola, ”Wavelet Shrinkage and Generalized Cross Validation for Image Denoising,” IEEE Transactions on Image Processing, Vol. 7, No. 1, January1998, pp.82-90.
[34]Misiti, M., Misiti, Y., Oppenheim, G., and Poggi, J. M., 1996,” Wavelet Toolbox: For Use with Matlab,” pp.4-21~4-22.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔