三电平变频器水冷散热器温度场的计算与分析  

Thermal Field Calculation and Analysis of Water-cooled Heat Sink in a Three-level SFC

作　　者：石书华 李守法[2] 张海燕[2] 逯乾鹏[2] 梁安江[2] 李建功[2] 

机构地区：[1]上海电气电站设备有限公司发电机厂,上海200240 [2]上海发电设备成套设计研究院,上海200240

出　　处：《动力工程》2010年第1期68-72,共5页Power Engineering

摘　　要：针对三电平静止频率变换装置(SFC)功率器件温升难以确定的问题,以1台2 MW/3.3kV三电平SFC为例,建立了其功率器件水冷散热器温度场的三维数学模型和有限元计算模型,并对三电平SFC在额定负载运行时水冷散热器的温度场进行了计算,结果表明:各测量点的计算值与测量值能较好地吻合,证明该计算模型是合理的.在该温度场计算模型的基础上,分析了冷却水流量对水冷散热器温度场的影响,结果表明:冷却水流量对水冷散热器的温度分布影响显著,随着流量的增加,水冷散热器的最高温度和最低温度都有所降低.Aiming at the difficultly in determining the temperature-rise of power device in the three-level static frequency converter （SFC）, taking a 2 MW/3.3 kV three-level SFC for example, a three-dimension- al thermal field mathematical model and finite element model for the water-cooled heat sink of its power de- vice were developed. The steady-state thermal field of the water-cooled heat sink of threeAevel SFC at ra- ted load was calculated. Results show that the calculated values agree well with the experimental values, which verify the rationality of the calculating model. The influence of cooling water flow on the thermal field of water-cooled heat sink was also analyzed by means of the model. Results show that cooling water flow has a significant influence on the thermal field of water-cooled heat sink, and both the maximum temperature and minimum temperature drop with increasing the flow.

关 键 词：三电平 静止频率变换装置 功率器件 水冷散热器 温度场 有限元模型 

分 类 号：TM46[电气工程—电器]