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高等電機機械 期末報告

高等電機機械 期末報告. 授課教授:秦純 教授 學生:陳立恒 學號: MA020215 班級:碩研電機一甲. 例 .5-22 有一四極, 60 赫茲, 24 千伏, 650 兆伏安的同步同步 發電 機,和 一 1.82 標么的同步電抗與 j0.21 的無功阻抗串聯,且激磁 發 電機的 端電壓保持在 24KV 。 PartA . 若 發電機的輸出功率調整至 375MW 求: (1) 畫出此相量圖. (2) 計算出電流與 相位角 Sol : V t =V ∞ = 1 pu , P base == 0.577pu

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高等電機機械 期末報告

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  1. 高等電機機械期末報告 授課教授:秦純 教授 學生:陳立恒 學號:MA020215 班級:碩研電機一甲

  2. 例.5-22 有一四極,60赫茲,24千伏,650兆伏安的同步同步發電 機,和一1.82標么的同步電抗與j0.21的無功阻抗串聯,且激磁發 電機的端電壓保持在24KV。 PartA.若發電機的輸出功率調整至375MW 求: (1)畫出此相量圖

  3. (2)計算出電流與相位角 Sol:Vt=V∞=1pu,Pbase==0.577pu δt==12.6˚ = = 0.578∠3.93˚pu Ibase= =15.64kA,且Ia=9.04kA

  4. (3) 算出發電機末端功率因子 PF==0.998 落後 (4) 算出發電機磁化電流Eaf的大小

  5. PartB.若發電機的輸出功率調整至600MW (1)畫出此相量圖 (2)計算出電流與相位角之端電壓 Ia=14.5 kA. (3) 算出發電機末端功率因子 Pf = 0.994 (4) 算出發電機磁化電流Eaf的大小 Eaf=2.06 pu=49.4 kV

  6. 例5.25 承5.9的電動機其工作條件為一次測滯後功率因數為0.8 求其額定終端電壓(Xd=1.0pu、Xq=0.6pu) Sol: ∵ PF= 0.8(落後) =Ia=1=0.8-j0.6 Ê= +jXqIq=1+j0.6(1 )= δ=19.4⁰

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