摘要
目前超过300 kW的大型电机,鲜少有采用环氧浇注技术的启动自耦变压器。针对温升设计的难点,提出了一种环氧浇注干式启动自耦变压器的设计思路。阐述了设计原理和关键技术;针对其运行工况的特殊性,基于漏磁场分布计算了损耗和阻抗,并通过Maxwell电磁进行仿真;围绕重点参数“线圈温升”设计了温升试验方案;综合考虑热绝缘系统、导体导热及绝缘材料导热等因素,通过流体Fluent软件配合电磁仿真进行多场耦合仿真。结果表明,计算的负载损耗略高于仿真值,仿真温升略低于计算值,满足工程应用要求。给出了试验、实际工况、仿真和计算的之间的差异及其来源。所提思路可供设计干式启动自耦变压器参考。
Currently,there are few large motors exceeding 300 kW that use cast-resin technology for starting autotransformers.A design concept for cast-resin dry-type starting autotransformer is proposed to address the temperature rise issue,design principles and key technologies are explained.Based on the special operating conditions,the losses and impedances are calculated based on the leakage magnetic field distribution,and simulated using Maxwell electromagnetic method;a temperature rise test plan is designed around the key parameter"coil temperature rise",thermal insulation system,conductor thermal conductivity,and insulation material thermal conductivity are taken into account.Multiple field coupling simulations are conducted using Fluent in simulation.The results indicate that the calculated load loss is slightly higher than the simulation value,and the simulated temperature rise is slightly lower than the calculated value,meeting the requirements of engineering applications.Differences and causes among tests,operation,simulation and calculation are discussed.The proposed ideas can serve as a reference for designing dry-type starting autotransformer.
作者
何啸雷
姜洪海
马宇航
He Xiaolei;Jiang Honghai;Ma Yuhang(Siemens Energy Transformer Co.,Ltd.,Guangzhou 511356,China)
出处
《机电工程技术》
2025年第23期145-152,共8页
Mechanical & Electrical Engineering Technology
关键词
自耦变压器
阻抗
负载损耗
仿真
温升试验
启动变压器
干式变压器
autotransformer
impedance
load loss
simulation
temperature rise test
starting transformer
dry-type transformer
