江昭皚2006-07-252018-07-102006-07-252018-07-102002-07-31http://ntur.lib.ntu.edu.tw//handle/246246/10432本計畫主要提出以同步相量量測器為基礎之換位與 無換位型雙迴路輸電線之保護技術。本技術乃利用線路之分 佈式模型與線路兩端之同步電壓及電流相量量測來完成。利 用特徵值/特徵向量理論，吾人可將線路間之互耦合效應予以 解耦，由此可推得故障偵測及定位指標。藉由此二指標之相 互配合，可以正確地辨別內部與外部故障。利用線上線路參 數評估，本技術可以對電力系統之故障有更正確之響應。基 於通盤考量可靠性、安全性與響應效能，本計畫利用統計與 最佳化觀念精巧地選擇故障偵測指標的臨界值設定。本計畫 亦探討比流器、比壓器與通信通道性能對此項保護技術的影 響。經由EMTP 大量之模擬測試，針對可靠度與安全性而 言，本技術可有優越及快速之動作，結果亦顯示本保護技術 幾乎不受各種電力系統及故障狀態之影響。This project proposes a PMU-based protection scheme for both transposed and untransposed parallel transmission lines. The development of the scheme is based on the distributed line model and the synchronized voltage and current phasor measurements at both ends of lines. By means of eigenvalue/eigenvector theory to decouple the mutual coupling effects between parallel lines, the fault detection and location indices are derived. The two proposed indices are used in coordination such that the internal and external fault events can be distinguished correctly. By on-line estimating the line parameters, the proposed scheme will respond more accurately to power system faults. Based on the concepts of statistics and optimization, an elaborate and subtle threshold setting set of the proposed fault detection/location indices is selected under equally taking the reliability, security and speed of the relaying scheme into consideration. The effects of the performance of CT, CVT, and communication channel on the designed relay are also included. Extensive simulation results using EMTP have verified that the proposed protection system responds well and fast with regard to dependability and security. The results show that the performance of the proposed scheme is almost independent of various system and fault conditions.application/pdf686610 bytesapplication/pdfzh-TW國立臺灣大學生物產業機電工程學系暨研究所數位保護同步相量量測器全球衛星定位系 統平行雙迴路輸電線reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/10432/1/902213E002146.pdf