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題 名 | Damping Subsynchronous Oscillations by Static Reactive Power Compensators with Load Effect Considered=以靜態虛功率補償器抑制具負載效應之次同步共振 |
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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51-65 |
分類號 | 448.115 |
關鍵詞 | 次同步共振; 穩定度; 虛功率; 負載模型; Subsynchronous oscillation; Stability; Reactive power; Load model; |
語 文 | 英文(English) |
中文摘要 | 靜態虛功率補償器 (SVC) 已被廣泛應用於工業界以改善電壓突降、閃爍等虛功率供需不平衡所造成之現象,本文則利用 SVC 抑制串聯電容器之電力系統所造成之次同步共振 (SSR)。為了更詳細的探討電力系統穩定度,電力系統採用 IEEE 第二標準模型系統一,並考慮了由靜態負載與感應電動機群所形成之區域性負載,探討區域負載種類與位置對次同步共振穩定度之效應;模態速率(Modal Speed) 回授之輔助控制器提供 SVC 電壓控制電路所增加之阻尼控制訊號,模態速率回授控制機構使得 SVC 能針對特定模式 (Mode) 加強阻尼,而對其餘之模式幾乎沒有影響,而所需輔助控制器數目等於所欲控制之模式數量。控制器參數之設定,使用模態控制理論發展出來之極點指定法設計。經由特徵值分析與動態非線性模擬結果顯示:SVC 加上額外之輔助控制器,可成為提供電力系統抑制次同步共振,增加穩定度之有效方法;而負載位置比負載型式對系統穩定度更有影響;部分模態速率回授可以針對特定之振盪模式加以抑制,對其餘模式幾乎沒有影響,而完全模態速率回授則可以控制所有之模式。 |
英文摘要 | A static reactive power (VAR) compensator (SVC) is used to provide desired damping effect to repress subsynchronous oscillations of a power system with series capacitor compensation. The SVC can give instantaneous reactive power modulation during dynamic period according to system requirement and provide desired damping torque. In order to give a more detailed system model for stability investigation, local loads, which consist of a static load and a dynamic load, are included. The effects of load type and load position on the damping of torsional modes are examined. Auxiliary controllers with modal speed feedback are designed to give an additional damping signal to the SVC voltage control circuit. The modal speed feedback control scheme can let the SVC enhance the damping of one specific mode while almost do not affect the other modes. The number of auxiliary controllers is equal to the number of desired controlled modes. The gains of the auxiliary controllers are determined by a pole assignment method which is a systematic design technique. The IEEE Second Benchmark Model System 1 is employed for this study. Results from eigenvalue analysis and time domain simulations show that the SVC with auxiliary controllers can provide an effective method to repress subsynchronous oscillations. The effect of load position is more significant than that of load type. In the partial modal speed feedback control scheme, selected modes can be controlled while the other modes are almost unchanged. In the full modal speed feedback control scheme, all modes can be controlled. |
本系統中英文摘要資訊取自各篇刊載內容。