1000MW水轮发电机转子高效冷却技术研究

Research on High-efficient Cooling Technology in Rotor of 1000MW Hydro Generator

单机1000MW水轮发电机组容量巨大,属超大型水电机组,但电机几何体积并未随容量的增加而线性增大,这意味着单位体积内的机电能量转换量大幅增加,定转子等发热部件的冷却难度也大幅增加。而对电机更高效率和更低温升水平的要求导致传统的冷却结构布置困难。本文介绍应用于1000MW水轮发电机的全新转子高效冷却技术,可以实现励磁绕组在低风量条件下温升也处于较低水平,并通过模型试验及温度场计算验证了技术的高效性。

The capacity of 1000 MW hydro generator unit is huge,however,the geometric volume of the generator doesn’t increase following the capacity. That means the power transformation in per volume increases,and the cooling for heating segments such like rotor and stator becomes more difficult. Meanwhile,because of the difficulty of arrangement,normal cooling system isn’t suitable for the requirement of higher efficiency and lower temperature raise of generator. This paper introduces a high-efficient cooling technology in rotor of 1000 MW hydro generator with experiment and calculation,which can achieve lower temperature raise in the condition of less volume of ventilation air.