22.8kV架空線絕緣協調與保護協調之模擬

Simulation of Insulation Coordination and Protection Coordination for 22.8kV Overhead Line

楊文奇(Wen-Chi Yang)

指導教授 ： 陳士麟

中原大學/工學院/電機工程研究所/碩士(2014年)

https://doi.org/10.6840/cycu201400370

摘要

本研究針對台電22.8kV架空配電線路進行絕緣協調與保護協調模擬，評估運用現行22.8kV避雷器等過電壓保護設備參數以及修改現行過電流保護設備參數之可行性。
　　絕緣協調的研究步驟係針對台電22.8kV架空配電線路，建立模型與蒐集參數，據之進行雷突波模擬。模擬結果顯示：絕緣協調分析證實，國內18kV避雷器與架空地線之雷擊防護措施，可使22.8kV架空線路符合IEEE Std. C62.22所建議基本雷突波衝擊準位，且保護裕度大於20%之規定。
　　本文模擬三相故障與單相接地故障故障電流，保護協調的模擬結果證實可22.8kV架空饋線可作為沿用11.4kV架空饋線的過電流保護方式。模擬結果顯示為可行的保護協調作法，提供22.8kV架空配電線路上主、後衛保護的良好保護協調。

關鍵字

保護協調 ； 22.8kV架空線路 ； 絕緣協調 ； 雷擊模擬

並列摘要

The thesis aims at the analysis of insulation coordination and protection coordination for 22.8kV overhead line in Taiwan. The voltages of distribution feeders used in Taiwan are divided into 22.8kV and 11.4kV levels, while the installations are divided into overhead and underground power distribution which 22.8kV voltage level is only implemented on underground distribution lines. To improve the power supply capacity, to reduce line losses and to simplify the voltage level, Taiwan Power Company intends to increase the distribution feeder voltage rating from 11.4kV to 22.8kV level comprehensively. Therefore, this project which studies on the installation of 22.8kV level overhead lines is proposed.
The insulation coordination research focuses on the voltage of insulator that 11.4kV overhead line used in Taiwan. As for using Alternative Transients Program (ATP) to simulate the lightning surge, the thesis explains the modeling methods, parameters and the simulation results. Finally the thesis discusses the characteristics of overvoltage and evaluates the insulation coordination conditions of 22.8kV overhead lines according to simulation results.
The protection coordination research focuses on the evaluation of whether the criteria adopted for estimating the short circuit currents of the 22.8kV distribution line. As the results of simulation, the research propose the methods of protection practice of 22.8kV overhead distribution lines.

並列關鍵字

Protection Coordination ； Insulation Coordination ； Lightning Surge ； 22.8kV Overhead Line

參考文獻

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[10] 陳世榮，氧化鋅避雷器之維護及線上監測技術，中原大學電機系碩士論文，2005年。

[32]陳三木，架空輸電線路雷擊閃絡之防止對策，國立成功大學電機系碩士論文，2006年。

[1] A. Greenwood, Electrical Transients in Power System, Second Edition, 1991.