開發圖形使用者介面電驛標置程式用於改善二次輸電網路過電流電驛保護協調設定

Developing a GUI Relay Setting Program to Improve the Protective Coordination Settings of Overcurrent Relays in Subtransmission Networks

陸茵(Ying Lu)

指導教授 ： 周至如 ； 高文秀

國立臺北科技大學/機電學院/機電科技研究所/博士(2010年)

摘要

本論文主要係藉由嚴謹有系統的分析設計步驟，實作偵測與排除曲線交叉技術以及縮短電驛動作時間技術，開發圖形使用者介面過電流電驛標置設定程式，供電驛工程人員快速解決實務上所遭遇到不易處理的保護協調問題，譬如上、下游協調曲線交叉、整體電驛動作時間過長等，用以替代傳統繁瑣費時之人工試誤解決方式。此外，本程式亦可作為電驛相關課程之教學輔助工具，使學生對過電流電驛保護協調的實際應用能有充分的了解。偵測與排除曲線交叉技術可令程式自動偵測上、下游協調曲線是否發生交叉，然後透過定點調整技術，針對發生交叉之電驛協調對之上游電驛，以不同的電流分接頭值計算該電驛新的標置值，使特性曲線能依原曲線上某一定點改變其位置及斜率，藉以解決協調曲線交叉之不當設定。縮短電驛動作時間技術可大幅縮短二次輸電網路系統保護電驛之整體動作時間，使昂貴的電力設備在故障發生時，不致因暴露在短路故障電流之時間過久而導致設備毀損的情形。

關鍵字

過電流電驛 ； 保護協調 ； 二次輸電網路

並列摘要

By employing the systematic analysis and design procedures, a GUI overcurrent relay setting program implementing the inspecting and eliminating curve intersection technique as well as the operating time reduction technique is developed to replace the traditional tedious and time-consuming trial-and-error manual process such that the protection engineers can use it to easily and effectively tackle the protective coordination problems encountered practically in subtransmission networks, such as curve intersection, and long operating time in coordination. In addition, this program is also suitable as an assistant tool for relay-related courses to enhance the students with better understanding in the application of the overcurrent relay coordination. The inspecting and eliminating curve intersection technique is first to inspect the curve intersection situation occurred in upstream and downstream coordinated overcurrent relay pairs, and then to solve the detected curve intersection problem with the fixed-point adjustment technique. The fixed-point adjustment technique will adjust the time dial setting of the backup relay of the target relay pair with different tap value in order that, passing through the selected point(i.e., fixed point), another curve with different slope and position can be acquired without any intersection appeared in the new curve and its corresponding primary one. With the operating time reduction technique, the overall operating time of relays coordinated in a subtransmission network can be significantly reduced such that they are able to respond in time in isolating the heavy short circuit fault before the fault current endangers the power equipments.

並列關鍵字

Overcurrent relay ； Protective coordination ； Subtransmision network

參考文獻

[1] P. E. Sutherland, “Protective Device Coordination in an Industrial Power System with Multiple Sources,” IEEE Transactions on Industry Applications, Vol. 33, No. 4, July/August 1997, pp.1096-1103.

[3] D. Birla, P. K. Maheshwari, and H. O. Gupta, “An Approach to Tackle the Threat of Sympathy Trips in Directional Overcurrent Relay Coordination,” IEEE Transactoions on Power Delivery, Vol. 22, No. 2, April 2007, pp.851-858.

[4] Jung-Hwan Oh, Sang-Yun Yun, Jae-Chul Kim, Il-Dong Kim, and Joon-Kee Ahn, “Evaluation method of transformer damage from auto-reclosing scheme in power distribution system,” IEEE Power Engineering Society, Summer meeting, Vol.2, 1999,. pp.774 – 779.

[8] General Electric Co., “Distribution Data Book,” Manual GET-1008L, General Electric Co., Schenectady, NY, 1972.

[16] Urdaneta A. J., Resterpo H., Sanchez J. and Fajardo J., “Coordination of Directional Overcurrent Relays Timing Using Linear Programming,” IEEE Transactions on Power Delivery, Vol. 11, No. 1, January 1996, pp.122-129.