研究生: |
陳淯星 Yu-Hsing Chen |
---|---|
論文名稱: |
以脈衝換相閘流體為基礎之固態轉供開關 A Solid-State Transfer Switch Based on Impulse-Commutated Thyristors |
指導教授: |
鄭博泰
Po-Tai Cheng |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
電機資訊學院 - 電機工程學系 Department of Electrical Engineering |
論文出版年: | 2004 |
畢業學年度: | 92 |
語文別: | 中文 |
論文頁數: | 120 |
中文關鍵詞: | 固態轉供開關 、閘流體 、電壓驟降 |
外文關鍵詞: | static transfer switch, thyristor, voltage sag |
相關次數: | 點閱:3 下載:0 |
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近年來電壓驟降已成為非常重要的電力品質議題。電壓驟降事故經常導致敏感性負載因欠電壓而停機,連帶使製程無預警中斷造成財務上嚴重損失。在台灣,許多科學園區相繼成立。每逢電力中斷或電壓驟降均使得這些製造廠蒙受巨大的損失,其損失金額可高達數十至數百萬美元。為了提供較佳的電力品質與供電可靠度,愈來越多的電力公司針對科學園區內之製造廠均有提供雙饋線供電。以半導體技術所製作之閘流體元件(thyristor)為基礎,所建構的固態轉供開關(static transfer switch,STS),能應用於雙饋線供電系統保護敏感性負載,避免負載因電壓驟降而跳機造成製程上的損失。傳統固態轉供開關之饋線轉移程序礙於閘流體元件之電氣特性與故障環境,其轉移程序所需之執行時間需耗費四分之一個市電週期以上。本論文提出一諧振換相電路用以改良傳統固態轉供開關其饋線轉移時間過長之問題。此一改良式固態轉供開關經證明能大幅縮短饋線轉移時間,並且提供更完善的保護策略能將電壓驟降對敏感性負載的影響降至最低。本論文所提出之改良式固態轉供開關已經由電磁暫態模擬程式(electro-magnetic transient program,EMTP),與實驗室之實測數據驗證其可行性。
In the recent years, voltage sags have become a very important power quality issue. Voltage sags often interrupt the manufacturing process and result in significant losses. In the high-tech industry parks of Taiwan, Manufacturers can lose up to a million US dollars for each voltage sags. To improve the power quality and reliability, more and more utility companies provide dual power feeders to these high-tech manufacturers. The static transfer switch (STS) based on thyristors can utilize the dual power feeders to protect sensitive loads against voltage sags. Conventional STS may require more than a quarter cycle to complete the transfer process depending on the load condition. In this thesis, an improved STS with resonant commutator circuit is proposed. The proposed system can greatly shorten the transfer time and provide better protection against voltage sags. Computer simulations and laboratory test results are presented to validate the performance of the proposed STS system.
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