摘要
大功率风机变流器安装在塔筒底部,空间相对密闭,变流器的散热效果会直接影响风电机组的安全运行,因而对散热系统结构的合理设计从而有效的促进变流器散热过程是至关重要的。建立大功率变流器散热系统模型,运用热流仿真技术对塔架的气体流动情况以及升温情况的模拟,对散热系统进行结构设计,分析比较了不同散热系统结构形式和散热效果。研究结果表明,优化后的散热系统结构可有效提高大功率变流器的散热效果,有效解决通风不足、散热集中、热量重新吸入等情况,有效保证变流器的允许温度环境,避免变流器因温度保护而导致停机的问题,确保风机正常运行。最后将计算仿真结果与现场数据进行比对,证明优化设计的散热系统结构符合工程实际要求。
The high-power converter is generally installed at the bottom of the tower where the space is relatively closed.Therefore,heat dissipation of the converter directly affects the safe operation of the unit,and it is crucial to design the heat dissipation system structure to effectively promote heat dissipation of the converter.The model of the heat dissipation system of the high-power converter is established,and the gas flow and temperature rise of the tower are simulated by the heat flow simulation technology.The structural design of the heat dissipation system is carried out.The structure forms and heat dissipation rates of different heat dissipation systems are analyzed and compared.Results show that the optimized cooling system structure can effectively improve heat dissipation of the high-power inverter and address issues such as insufficient ventilation,concentrated heat dissipation and reabsorption of heat.The proposed design can effectively keep the environmental temperature around the converter sufficiently low to avoid equipment shutdowndue to temperature protection.Finally,the simulation results are compared with the experimental data,and it is proved that the heat dissipation structure involved conforms to the practical requirements of the project.
作者
焦守雷
王成贤
JIAO Shoulei;WANG Chengxian(CRRC Shandong Wind Power Co.,Ltd.,Jinan 250022,China)
出处
《机械设计与研究》
CSCD
北大核心
2023年第5期197-201,206,共6页
Machine Design And Research
关键词
热流仿真
变流器
散热性能
结构设计
优化
heat-flow simulation
converter
heat dissipation performance
structure design
optimaze
