https://scholars.lib.ntu.edu.tw/handle/123456789/176012
標題: | 高性能輸電線保護電驛系統的設計(2/2) | 作者: | 江昭皚 | 關鍵字: | 數位保護;全球衛星定位系統;同步相量量測 器;輸電線保護;保護電驛 | 公開日期: | 31-七月-2004 | 出版社: | 臺北市:國立臺灣大學生物產業機電工程學系暨研究所 | 摘要: | 本計畫提出以同步相量量測為基礎之輸電線適應 保護技術,其保護功能包括故障偵測、故障方向鑑別、故障 型態判別及故障定位等。本技術藉由線路雙端同步量測、線 路之分佈式模型及模態轉換理論,推導出線路故障偵測及定 位指標,其中故障偵測指標乃由兩個複數相量所構成,由此 二相量之相角差,可完成內、外部故障區域之判別。而利用 模態故障偵測指標則可完成故障型態判別之工作。本文所提 電驛技術可應用於換位與無換位型線路之保護。本技術並結 合線路參數線上估測法以確保其性能,達成適應性保護之目 的。經由EMTP 大量之模擬測試,顯示於各種不同之系統及 故障狀態下,本保護電驛技術均具有快速之電驛響應性能及 高準確度之故障定位結果。模擬測試結果亦證明本電驛技術 不受CT 飽和及CCVT 暫態之影響。針對可靠度、安全性及 靈敏度而言,本技術均可有優越之響應性能。 This project presents an adaptive fault protection scheme for transmission lines using synchronized phasor measurements. The protective functions include fault detection, direction discrimination, classification and location. Both fault detection and fault location indices are derived by using twoterminal synchronized measurements incorporated with distributed line model and modal transformation theory. The fault detection index is composed of two complex phasors. The angle difference between the two phasors determines whether the fault is internal or external to the protected zone. The fault types can be classified by the modal fault detection index. The relaying scheme can be applied to protect transposed and untransposed lines. The proposed scheme also combines on-line parameter estimation to assure protection scheme performance and to achieve adaptive protection. Extensive EMTP simulation studies show that the proposed scheme provides a fast relay response and high accuracy in fault location under various system and fault conditions. The studies verify that the response of the proposed relaying scheme is unaffected by CT saturation and CCVT transients under internal and external faults. The proposed method responds very well with regard to dependability, security and sensitivity. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/10445 | 其他識別: | 922213E002030 | Rights: | 國立臺灣大學生物產業機電工程學系暨研究所 |
顯示於: | 生物機電工程學系 |
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922213E002030.pdf | 1.57 MB | Adobe PDF | 檢視/開啟 |
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