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題 名 | Damping Subsynchronous Oscillations by a Superconducting Magnetic Energy Storage (SMES) Unit=以超導體儲能系統抑制次同步共振 |
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作 者 | 呂俊鋒; 吳啟瑞; | 書刊名 | 中州學報 |
卷 期 | 11 1998.07[民87.07] |
頁 次 | 頁67-82 |
分類號 | 448.2 |
關鍵詞 | 次同步共振; 超導體儲能系統; 穩定度; |
語 文 | 英文(English) |
中文摘要 | 本文基於超導體儲能系統 (SMES) 之應用,研究以其來抑制蒸氣渦輪發電機之次同步共振 (SSR)。此超導體儲能系統能於電力系統動態期間連續且同時謂制實功率與虛功率,使用發電機轉子轉速或模態速率作為回授訊號,SMES三種不同之控制機構被設計來增加扭矩模式的阻尼,並比較不同控制系統彼此之差異。本研究採用 IEEE 第二標準模型,由特徵值分析與動態時域模擬結果顯示:加入回授控制機構之 SMES 可以有效壓制次向步共振,在發電機轉子轉速回授控制機構下,可控制之共振模式依回授控制器之自由度而定;於部份模態速率回授控制機構下,可以任意選擇欲加以控制之共振模式,而幾乎不影響其它模式或特性;在全模態速率回授控制機構下,所有共振模式均可以加以控制。本研究同時肯定當系統兩條平行輸電線其中之一因維修或故障而無法輸電下,SMES 仍能保證電力系統之穩定。 |
英文摘要 | An approach for damping the subsynchronous oscillations of steam turbine generator, based on the application of a superconducting magnetic energy storage (SMES) unit, is presented. The unit can give simultaneous active and reactive power modulation to the power system during the dynamic period. Using generator rotor speed or modal speeds as feedback signals, three control schemes of the SMES are designed to increase the damping of torsional modes. A comparison is made between those different feedback control systems. The IEEE Second Benchmark Model is employed forth is study. The results from eigenvalue analysis and time domain simulation show that the SMES unit with a feedback control scheme can provide an effective method to repress the subsynchronous oscillations. In the generator rotor speed feedback control scheme, the number of the controlled modes depends on the degree of freedom of the feedback controller. In the partial modal speed feedback control scheme, selected modes can be arbitrarily controlled while the other modes are almost unchanged. In the full modal speed feedback control scheme, all modes can be controlled. The SMES unit also ensures a stable system when one of the parallel lines is out of service due to maintenance or component fault. |
本系統中英文摘要資訊取自各篇刊載內容。