135MW蒸发冷却汽轮发电机定子绝缘结构的研究

为了将蒸发冷却技术应用于高电压、大容量的汽轮发电机,并作为主力机组,需要解决定子绝缘结构的合理设计问题.本论文针对蒸发冷却的特点,提出采用浸润式蒸发冷却定子的间接冷却方式,详细计算并分析了该冷却方式下的定子绝缘结构内的电场与温度场,总结其分布规律与特点.在此基础上提出135MW蒸发冷却汽轮发电机定子的绝缘厚度以及相应的电流密度,并通过了试验模型的检验,研究结果值得借鉴.

Research on stator insulation structure of 135MW evaporative cooling turbo-generator

In order to apply evaporative cooling technics to a high voltage and large capacity turbo-generator that will be used as a main power generator, the problem of designing reasonable insulation structure is to be solved. This paper offers an immerging evaporative cooling stator, with consideration of its specialties. This paper calculates and analyzes the electric field and the temperature field in immerging evaporative cooling stator insulation structure in detail, then summarizes the distribution rules or specialties of these two fields. As results this paper gives the stator insulation thickness which is reduced greatly as compared 135MW evaporative cooling turbo-generator. The with traditional one and the corresponding current density, aiming to conclusion has been tested and is worthy for reference.