國立臺灣大學電機工程學系暨研究所劉志文2006-07-252018-07-062006-07-252018-07-062000-07-31http://ntur.lib.ntu.edu.tw//handle/246246/7743本文提出一種以同步相量量測單元為基礎之超高壓雙 迴路輸電線適應保護電驛。將匯流排兩端量測所得之同步電 壓與電流相量經由模態轉換來解耦合，推導出故障偵測及定 位等兩個指標。利用這兩個指標M 與D 完成輸電線保護 電驛設計。本文利用參數評估演算法，來克服線路參數不確 定性對故障定位及偵測性能之影響。最後，利用EMTP/ATP 作了大量之故障模擬，故障定位準確度達99.9%。此外，本 保護電驛之響應時間非常快速，對於大部份之故障皆可維持 在6毫秒左右。本文所提出之保護電驛技術其安全性與可靠 度分別達99.99%與98.36%。This paper presents an adaptive relay for EHV doublecircuit transmission lines based on Phasor Measurement Units (PMUs). Decoupling the synchronized voltage and current phasors by modal transformation, two novel and composite fault discrimination and location indices are derived. The proposed relay scheme utilizing indices M and D is described. To overcome the effects of line parameter uncertainties on the performance of the fault location and discrimination, a line parameter estimation algorithm is also developed. Extensive simulation studies using EMTP/ATP have verified that the accuracy of fault location estimation achieved can be even up to 99.9 % for most simulated cases. The designed relay is very fast and response time almost remained well within 6 milliseconds for most fault events. The security and reliability of the proposed relaying scheme can achieve even up to 99.99 % and 98.36 %, respectively.application/pdf94431 bytesapplication/pdfzh-TW國立臺灣大學電機工程學系暨研究所同步相量量測單元保護電驛故障定位Phasor Measurement Unit (PMU)Protection RelayFault Locationreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/7743/1/892212E002083.pdf