Thermal cycle testing of form - wound stator bars and coils for large generators 大型發(fā)電機用模繞定子棒和模繞線圈的熱循環(huán)試驗
Analysis and comparison of four transposition methods in the stator bar of hydrogenerator 水輪發(fā)電機定子線棒4種換位的分析與比較
Recommended practice for thermal cycle testing of form - wound stator bars and coils for large generators 大型發(fā)電機線繞定子棒和線圈的熱循環(huán)試驗推薦規(guī)程
So that the maximum pd grads is the characteristic quantity of evaluating the insulation condition of stator bar has been put forward 因此,提出了以絕緣局部放電的最大放電量的梯度作為評定絕緣的一個特征量。
To increase the utility of energy sources , it is necessary to pay full attention to the refurbish and upgrade of the generators , where the skin effect of stator bars is an important problem 為了進一步提高能源的利用率,人們對已有發(fā)電機的增容增效引起了高度的重視,發(fā)電機定子線棒的集膚效應問題也受到廣泛的關注。
Test and analysis for the stator bars temperature in gezhouba power plant show that , by different transposition , temperature distribution in bars is different . the reason is in skin effect and circulating current among different layers 究其原因,各股線的電流不等,股線間存在較大的環(huán)流,造成各股線間溫差可高達30 40 。
Preparing the manufacturing operation plans for generator casing , rotors assembly , stator bars and laminations producing in accordance with engineering documents and master planning schedule in order that our production has the reasonable costs and efficiency and the designed quality 根據(jù)工程設計文件和主計劃按時為定子機座、轉子下線、定子線棒和沖片的制造等編制工藝過程卡,使產品制造成本和加工效率合理,產品質量達到設計要求。
In this paper , the multifactors - electrical , thermal , cool and thermal circulation of accelerating ageing experiment based on the stator bar of 220mw turbine generator has been conducted in the laboratory . the results of the experiment show that there has not fixed rule between maximum pd quantity and insulation , but the increasing of maximum pd grads increase along with ageing time of insulation 本論文通過對220mw的汽輪發(fā)電機真機線棒進行電、熱、冷熱循環(huán)等多因子老化試驗,發(fā)現(xiàn)局部放電的最大放電量與絕緣老化時間之間沒有固定的規(guī)律可尋,而最大放電量的梯度隨絕緣老化時間的增大而增大。
By adopting the traditional way to rebuild the ventilation system is also an effective measure , but the results will not be significant . by changing the transposition of the stator bars in the generators to decrease their maximum temperature has been adopted by some power plants and good economic results have been obtained 采用傳統(tǒng)的改造發(fā)電機通風系統(tǒng)只是有效措施之一,但通常改造的空間不大,在本文中提出改變發(fā)電機定子線棒的換位方式以徹底降低線棒溫度,這種方式已被一些水電廠所采用,取得了良好的經濟效果。