數位測距電驛研製與測試

Implementation and Testing of Digital Distance Relays

廖俊達(Jyun-Da Liao)

指導教授 ： 劉志文

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2005年)

https://doi.org/10.6342/NTU.2005.00320

摘要

本研究利用現今已商業化量產的(digital signal process)DSP晶片，配合數位測距電驛演算法理論，實現一數位式測距保護電驛。當線路瞬間故障，在裝設電驛的母線端所量得之電壓信號含有大量的雜訊，電流則有直流偏移值(DC Offset)，此會嚴重影響電驛判斷的速度及正確性。為了達到高速動作的要求，數位電驛必須快速的從含有雜訊的輸入訊號中，獲得計算所需的電壓及電流的基本波信號。本論文藉由德州儀器所生產的TMS320VC33 DSP數位訊號處理器將數位餘弦濾波器(COSFilter)加以實現，並加以模擬及驗證，實現一數位測距電驛。

關鍵字

數位測距電驛 ； DSP

並列摘要

This paper capitalizes the commercialized production of DSP (digital signal process)chip， and make use of digital distance algorithm to realize digital distance relays. When a fault occurs on line during operation， the signals of voltage and current would be severely distorted. These signals may contain decaying dc components. It could seriously influence the judgment and accuracy of relays. For the purpose of achieving the goal of fast response， relays have to quickly obtain the fundamental signals of voltage and current from the input signal containing noise.
This paper accomplishes COSFilter by TMS320VC33 DSP，simulation and verify to realize the digital distance relays.

並列關鍵字

digital distance rekays ； 數位訊號處理

參考文獻

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[3] T.S. Sidhu， D. S. Ghotra， and M. S. Sachdev， “A Fast Distance Relay Using Adaptive

[4] Tarlochan S. Sidhu， Daljit S. Ghotra， and Mohindar S. Sachdev， “An Adaptive Distance Relay and its Performance Comparison With Fixed Data Window Distance Relay”， IEEE Trans. on power delivery， vol. 17， NO. 3， JULY 2002.

[5] G.Benmouyal， “Removal of DC-Offset in Current Waveforms Using Digital Mimic

P. M. Anderson， Power System Protection， McGraw-Hill， 1999.