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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 許源浴 | |
dc.contributor.author | Yi-Lin Chuang | en |
dc.contributor.author | 莊一麟 | zh_TW |
dc.date.accessioned | 2021-06-08T00:21:04Z | - |
dc.date.copyright | 2013-07-31 | |
dc.date.issued | 2013 | |
dc.date.submitted | 2013-07-23 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/17558 | - |
dc.description.abstract | 隨著風力發電機組總裝置容量的增加,世界各國紛紛制定新的風機併網規範,因應風力發電機組與電力系統互聯可能產生的問題;其中,與此併網問題密切相關的法規,乃風機之低電壓穿越能力,要求風機在擾動發生時能夠維持併網,並支持電網直到電壓恢復。
由於鼠籠式感應發電機構造簡單、可靠性高、維修成本較低,故廣泛被應用於風力發電機組,但是當系統發生故障時,其端電壓容易急遽下降,造成電磁轉矩衰減使發電機無法輸出電功率,由於故障期間發電機吸收機械功率大於輸出之電功率,將使轉子轉速不斷增加,導致過速保護啟動使之與市電解聯。為了使風機能在系統故障期間持續併網運轉,本論文利用動態電壓調整器,在系統發生短路故障時,穩定鼠籠式感應發電機之端電壓,使發電機可穩定輸出功率,避免轉子過速而與市電解聯。 本論文以MATLAB/Simulink/SimPowerSystems軟體,建立併網之鼠籠式感應發電機模型,模擬結果顯示,當系統發生三相短路故障時,動態電壓調整器可穩定鼠籠式感應發電機端電壓,確保發電機在系統故障期間穩定輸出電力,並能持續併網運轉,符合台電再生能源發電系統併聯技術要點中,風機低電壓持續運轉能力之規範。 | zh_TW |
dc.description.abstract | The increasing wind farm installations have forced utilities worldwide to develop new grid codes to integrate wind power generation into the grid. One of the highly related codes is the low voltage ride through (LVRT) capability of wind generators, which requests that wind turbines remain grid-connected and help support the system voltage following disturbances.
Squirrel-cage induction generators (SCIGs) have been extensively used in wind power generation due to their simple configuration, reliability, and low maintenance cost compared to other types of wind generators. However, when a fault takes place in the power system, its terminal voltage tends to dip dramatically, which leads to the decrease in SCIG’s output electric torque and thus hinders SCIG from generating electric power. Since the real power exported to the grid is significantly reduced during the fault while the input mechanical power from the wind turbine remains almost constant, the generator will accelerate during the short circuit event to mechanically store the energy excess. As the generator speed rises to a certain limit, over-speed protection will be triggered to disconnect the wind turbine from the grid to protect it from being damaged. In this thesis, a dynamic voltage regulator (DVR) is designed to regulate the terminal voltage of a SCIG during system fault so that SCIG has a stable real power output. Since the generator speed is stable, grid connection of the wind turbine during system fault can be ensured. This thesis uses MATLAB/Simulink/SimPowerSystems simulation tool to simulate the dynamic performance of a grid-connected SCIG. Simulation results indicate that SCIG compensated by the proposed DVR has a regulated terminal voltage and exports steady real power when there is a three-phase fault. Through computer simulations, it is convinced that the SCIG with DVR is able to remain connected to the grid during system fault and the LVRT requirement imposed by Taiwan Power Company can therefore be met. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T00:21:04Z (GMT). No. of bitstreams: 1 ntu-102-R00921017-1.pdf: 2326619 bytes, checksum: 63843749d536dcc9b20d3a3052d1f968 (MD5) Previous issue date: 2013 | en |
dc.description.tableofcontents | 口試委員會審定書 i
誌謝 ii 摘要 iii Abstract iv 目錄 vi 圖目錄 viii 表目錄 xii 第一章 緒論 1 1.1 研究背景與動機 1 1.2 文獻回顧 2 1.3 研究目的與方法 9 1.4 論文內容概述 9 第二章 風力感應發電機相關理論分析 11 2.1 風力發電原理 11 2.2 風力發電機種類 12 2.3 同步旋轉座標轉換 14 2.3.1 同步旋轉座標軸基本概念 14 2.3.2 同步旋轉座標軸轉換法 15 2.4 感應發電機數學模型 17 2.5 與市電併聯之感應發電機 19 第三章 風機低電壓穿越特性之規範與實現 21 3.1 風機低電壓持續運轉規範 21 3.2 低電壓穿越簡介 22 3.3 風機低電壓穿越之實現─利用彈性交流輸電系統 22 3.3.1 靜態同步補償器 23 3.3.2 動態電壓調整器 25 第四章 動態電壓調整器相關理論及設計 29 4.1 串聯補償器基本原理 29 4.1.1 增加傳輸功率 29 4.1.2 提升電壓穩定度 31 4.1.3 提升暫態穩定度 32 4.1.4 提供電力系統振盪阻尼 33 4.2 動態電壓調整器補償電壓相量分析 33 4.3 動態電壓調整器之實虛功分析 35 4.4 動態電壓調整器之控制架構設計 37 第五章 模擬結果與分析 43 5.1 前言 43 5.2 模擬架構與參數 44 5.3 風力感應發電機低電壓穿越特性模擬 45 5.3.1 輸電線長度對風機低電壓穿越特性的影響 47 5.3.2 以動態電壓調整器改善風機低電壓穿越能力 62 第六章 結論與未來研究方向 85 6.1 結論 85 6.2 未來研究方向 86 參考文獻 87 | |
dc.language.iso | zh-TW | |
dc.title | 以動態電壓調整器改善市電併聯之鼠籠式感應發電機低電壓穿越能力之研究 | zh_TW |
dc.title | LVRT Capability Improvement of a Grid-Connected Squirrel Cage Induction Generator by DVR | en |
dc.type | Thesis | |
dc.date.schoolyear | 101-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 張忠良,楊金石,劉添華 | |
dc.subject.keyword | 風力發電,低電壓穿越,感應發電機,動態電壓調整器, | zh_TW |
dc.subject.keyword | wind power generation,low voltage ride through,induction generator,dynamic voltage regulator, | en |
dc.relation.page | 88 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2013-07-23 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電機工程學研究所 | zh_TW |
顯示於系所單位: | 電機工程學系 |
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