【作者】 刘志刚；

【导师】 王秀春；

【作者基本信息】 河北工业大学 ， 热能工程， 2002， 硕士

【摘要】 干式电力变压器具有不燃、不爆、体积小、维护少、可深入负荷中心等优点，是近年来防灾型变压器中用量最大的一种，许多人对其平均温升和最热点温升进行了大量的研究。但这些研究多集中于计算方式，而很少采用试验手段。 本文对F级树脂浇注式干式变压器的高、低线圈的平均温升，内部温度分布和时间常数在自冷和风冷，两种冷却方式下随负载变化的规律进行了研究，得出了平均温升、热点温升和时间常数随负载变化的相互关系和有关计算用参数和公式，试验结果可作为改进干式电力变压器的热设计的依据和对现行标准进行修改的参考。 研究开发了计算干式电力变压器负载能力的计算软件，可对于各种绝缘结构，各种冷却方式和任一地区、任一时间下运行的变压器在不同运行载荷下的最热点温升绝缘老化率进行分析和计算，同时利用该软件制造厂可以依据用户提出的运行负载量给出相应的热设计方案，用户可根据运行负载情况利用软件计算所需变压器的额定容量，避免额定容量选择不当造成隐患和浪费。更多还原

【Abstract】 Dry-type power transformer is widely used in these days because of its good qualities, such as not flammable, hard to explode, small volume, little maintenance and easy to be placed into buildings near the load center. Many people have made considerable reaches on its average and hottest spot temperature rise. But most of the efforts were focused on calculation, and experimental ways were seldom adopted.By close study on the average temperature rise, temperature distribution, and tune constant of the class F resin dry type power transformer’s high voltage and low voltage winding under self-cooling and wind-cooling mode, we find out the connection between the variation of the load and the items, mentioned above. The results of the experiments can be reference to both thermal design optimization of dry type power transformer and the revision of current standards.Meanwhile, we develop the software, which can predict the overload ability of the dry type power transformer. Under different load, when we apply this software to any time, region and cooling way, we can get the hottest spot increment and aging rating. To manufactory, the software means sounder thermal design, which will meet the load, putted forward by user, while to user, the software equal to a master who can help them decide the capacity rating of the transformer, which will fit the load. By using the software, the potential danger and the waste, caused by unfit load choice may be avoided.更多还原