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題 名 | 應用閘控串聯電容器於彈性交流輸電系統穩定度=Application of Thyristor Controlled Series Capacitor for Flexible AC Transmission System Stability |
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作 者 | 呂俊鋒; 施能義; | 書刊名 | 中州學報 |
卷 期 | 19 2004.06[民93.06] |
頁 次 | 頁175-186 |
分類號 | 448.115 |
關鍵詞 | 彈性交流輸電系統; 閘控串聯電容器; 模態控制理論; 穩定度; Flexible AC transmission system; FACTS; Thyristor controlled series capacitor; TCSC; Modal control theorem; Stability; |
語 文 | 中文(Chinese) |
中文摘要 | 台灣電力系統由於地理環境與成本因素,新設電廠與輸電線路數量受限,如何於既有輸電線路上增加設施或修改控制器,以增加傳輸電力並改善系統動態響應,形成一重大課題。彈性交流輸電系統(flexible AC transmission systems, FACTS)設備,如閘控串聯電容器(thyristor controlled series capacitor, TCSC)、制動電阻、並聯電容電抗與靜態移相器等,被用來動態調整網路組態,以便加強系統靜態特性與暫態穩定度。 現代電力系統龐大且複雜,擾動常改變網路結構並導致非線性響應,本文採用閘控串聯電容器來增加電力系統動態穩定度,閘控串聯電容器之阻抗由輔助進相遲相控制器依電力系統頻率變化量來作調制,輔助控制器參數依據模態控制理論(modal control theorem)所發展出來的極點指定法(pole-assignment method)來決定。 茲因控制器係針對特定操作點設計,為探討控制器之強韌性(robustness)及適用範圍,針對系統在不同發電機輸出功率、端電壓、功率因數之低頻振盪模式與發電機特徵值將被驗證。數值模擬將確認所提控制方法適用於大訊號暫態穩定度並可增進電力傳輸容量。 |
英文摘要 | Because of geography and cost, the amount of new generator units and transmission lines are constrained in Taiwan power system. How to add some supplementary device or to modify controller in existing transmission system to extend their loading levels and to improve the dynamic response of power system is important. Flexible AC transmission system (FACTS) devices, such as thyristor controlled series capacitors (TCSC), braking resistors, shunt capacitors reactors, and phase shifters, are used for dynamically adjusting the network configuration to enhance steady-state performance as well as transient stability. Modern power system are large and complex. Disturbance typically change the network topology and result in nonlinear system response. The TCSC is employed to improve the stability of power system in this paper. An auxiliary lead-lag controller is employed to control the impedance of TCSC according to generator speed deviation. The gains of the proposed auxiliary controller are determined by a pole assignment method based on the modal control theorem. Since the controller is designed under a prespecified operating point, it is worth to observe and survey the sensitivity of closed loop eigenvalues with respect to varied loading conditions, different power factors, and terminal voltage. It has been examined that the TCSC with the lead-lag auxiliary controller can ensure good damping for the power system under various operating points. A numerical simulation has verified that the proposed control is highly successful for large-signal transient stability and to improve electric power transmission loadability. |
本系統中英文摘要資訊取自各篇刊載內容。