330MW蒸发冷却汽轮发电机冷却技术的特点及性能  

Cooling Characteristics and Performance of the 330MW Evaporative Cooling Turbo Generator

作　　者：国建鸿[1] 顾国彪[1] 傅德平[1] 黄德书 

机构地区：[1]中国科学院电工研究所,北京100080 [2]上海汽轮发电机有限公司,上海200240

出　　处：《电工技术学报》2013年第3期134-139,共6页Transactions of China Electrotechnical Society

基　　金："十一五"国家科技支撑计划重大资助项目(2006BAA02B01)

摘　　要：我国大型发电机蒸发冷却技术的研发已有60多年的历史,近年来实现了由实验室试验研究阶段向工业化、商品化应用的转变。本文以300MW量级蒸发冷却汽轮发电机为研究对象,讲述了蒸发冷却汽轮发电机的特点,并依据两相流与传热理论,采用有限元法对定子三维温度场进行数值计算,给出了在发电机温度场求解域中的温度分布规律。并以此为依据完成了样机设计和制造,将计算结果与样机型式试验结果进行比较,表明浸泡在蒸发冷却介质中的电机定子绕组层间最高温升低于42K,铁心温升最高15K,远低于汽轮发电机冷却技术要求的温升限制,说明300MW级汽轮发电机应用蒸发冷却技术是可行的。也验证了仿真计算的准确性,为以后同类型更大容量电机设计提供了理论依据。In our country, research and study on the evaporative cooling technology for the large scale generator has a history of more than 60 years. In recent years, the development of the evaporative cooling technology has moved out from the laboratory experiment to industrial and commercial application. In this article, the characteristics of the evaporative cooling technology are introduced, and then based on the 300MW evaporative cooling turbine generator as an example, the stator winding temperature field simulation based on the two-phase flow and heat transfer theory is provided; a 3D stator temperature field numerical calculation using the finite element method is conducted to provide the temperature distribution of the calculation region of the generator. Based on the simulation results a sample device was built for testing. According to the testing results the highest temperature rise of the motor stator winding immersed in the evaporative cooling medium is less than 42K, and the highest temperature rise in the core is less than 15K, far below the turbine generator cooling technical requirement. The testing results demonstrate that the evaporative cooling is feasible for the 300MW turbine generator, and comparison of the testing results with the simulation demonstrates the accuracy of the simulation and simulations feasibility for greater capacity power generator development.

关 键 词：汽轮发电机 自循环 蒸发冷却 相变换热 

分 类 号：TM351[电气工程—电机]