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研究生:張志忠
研究生(外文):Chih-Chung Chang
論文名稱:通霄電廠發電機穩定度測試與評估
論文名稱(外文):Test and Assessment of Stability for Generators in the Tong-Shiao Generation Station
指導教授:吳啟瑞吳啟瑞引用關係
指導教授(外文):Chi-Jui Wu
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電機工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
論文頁數:110
中文關鍵詞:靜態穩定度動態穩定度勵磁系統現場量測
外文關鍵詞:static stabilitydynamic stabilityexcitation systemfield measurement
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由於通霄電廠靜態勵磁式發電機曾經因為轄區內電弧爐運轉時引起的電壓閃爍而造成跳機事故,後來經由調整勵磁系統參數已經能正常運轉,而本文則要測試與評估這些發電機受電壓閃爍干擾時是否已有足夠的穩定度。首先長時間量測發電機受到電壓閃爍干擾下的輸出反應,並檢查變化範圍是否均在發電機的額定容量之內。其次評估電廠中兩種勵磁系統發電機的動態穩定度,評估方法利用頻域之頻率響應和時域之步階響應。頻率響應法由發電機的數學模型得到轉移函數,畫出波德圖以求出穩定度評估指標值。步階響應法為實際在勵磁系統加入步階輸入訊號,再分別量測發電機在無載及滿載時的輸出響應,並由輸出波形判斷穩定度程度。最後建立通霄電廠與鄰近161kV匯流排的等效網路系統,並模擬傳輸線及發電機跳脫後對發電機的影響。
由長時間量測結果顯示發電機輸出無效功率受161kV匯流排電壓變化影響主導,當匯流排電壓下降1%,發電機無效功率約增加6MVar。發電機有效功率和無效功率輸出變化皆在額定運轉容量曲線內,功因維持在0.9以上。頻域響應分析結果顯示各項穩定度指標值皆在IEEE-421.2的建議範圍內。步階響應分析結果顯示靜態勵磁式發電機響應較快且穩定,無刷旋轉勵磁式發電機響應較慢且有持續的有效功率振盪。整廠穩定度模擬結果顯示事故發生後廠內發電機仍然能穩定地運轉。
綜合以上的測試、模擬與評估結果,通霄電廠發電機的工作特性正常且穩定度佳。

The generators with static excitation systems in the Tong-Shiao Generation Station had been tripped when the adjacent electric arc furnaces were in operation. After re-tuning the parameters of excitation systems, these generators have been in normal operation. This thesis describes the test and assessment of stability for generators under voltage fluctuation. First, the output responses of generators are measured under long duration voltage fluctuation, and then the variations of active power and reactive power are checked to be inside the rating curve or not, which is designed by manufactures. Secondly, the methods of frequency response and time response are used to assess the dynamic stability of two generators with different excitation systems. The procedure of frequency response needs to calculate the transfer function from the system model, and then the performance index is obtained by the Bode diagram. In the time response test, a unit step signal is added into the excitation system, and then the dynamic responses of generators are measured and analyzed under off-load and on-load conditions. The dynamic stability conditions are obtained from output waveforms. Finally, the equivalent power system network with the Tong-Shiao Generation Station and adjacent 161kV buses are built. Several fault events, such as tripping of transmission lines and generators, are applied in computer simulations to assess the influences of these events.
The results of long duration measurement indicate that if the voltage of 161kV bus droops 1%, the reactive power of generator arises 6MVar. And the variations of active power and reactive power locate inside the rating curve. The results of frequency response indicate that the performance indexes are within the IEEE-421.2 recommended ranges. The field test results of time response show that the responses of the generator with a static excitation system are faster and more stable, and the generator with a brushless excitation system has sustained active power oscillations. The simulation results of the whole power plant show that it is stable if there are fault events.
From the result of field test, simulation and assessment, these generators have normal operating characteristic and suitable stability.

第一章 緒論1
1.1 研究動機與方法1
1.2 研究背景2
1.3 研究章節概述4
第二章 系統簡介5
2.1 發電機控制系統5
2.1.1 負載補償8
2.1.2 電力系統穩定器9
2.1.3 欠激限制器9
2.1.4 過激限制器10
2.1.5 電壓/頻率限制器10
2.2 通霄電廠系統概述11
2.2.1 靜態勵磁系統12
2.2.2 無刷旋轉整流勵磁系統13
第三章 發電機靜態操作範圍量測14
3.1 前言14
3.2 電壓變動對發電機的影響15
3.3 容量曲線運轉檢查23
3.4 本章結論26
第四章 發電機動態穩定度評估27
4.1穩定度測試與評估方法27
4.2 發電機頻域響應測試評估32
4.3 發電機時域響應測試評估38
4.3.1測試步驟38
4.3.2 量測結果與分析39
4.4 本章結論65
第五章 整廠穩定度評估67
5.1前言67
5.2系統模型建立69
5.3電力潮流分析75
5.4 故障事故模擬88
5.5 本章結論102
第六章 結論與未來研究方向103
6.1 結論103
6.2 未來研究方向104
參考文獻105

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