换流阀相变乳液换热性能及其工程应用研究  

Heat Transfer Performance and Engineering Application of Phase Change Dispersion for Cooling System in the Convert Valve

作　　者：周建辉 王航 刘杉 魏晓光 贺之渊 谯耕 ZHOU Jianhui;WANG Hang;LIU Shan;WEI Xiaoguang;HE Zhiyuan;QIAO Geng(Global Energy Interconnection Research Institute Co.,Ltd.,Changping District,Beijing 102209,China;Global Energy Interconnection Research Institute Europe GmbH,Berlin 10623,Germany)

机构地区：[1]全球能源互联网研究院有限公司,北京市昌平区102209 [2]全球能源互联网研究院有限公司欧洲研究院,德国柏林10623

出　　处：《电网技术》2022年第1期395-403,共9页Power System Technology

基　　金：国家电网有限公司总部科技项目(5500-201958518A-0-0-00):“换流变阀侧套管用新型强制冷却载流系统技术与工程应用研究”。

摘　　要：通过实验和数值模拟方法获得了相变乳状流体的传热性能,讨论了在相变乳状流体冷却条件下热通量、流量和质量分数对换流阀散热器传热特性的影响,并由实验验证了所采用的模型和算法可靠性。研究结果表明,相变乳状流体平均对流换热系数几乎是水的3倍,相变乳状流体散热器热阻要低于水冷却散热器50%以上,同时相变乳状流体的压降略有提高,约为12%以内;采用相变乳状流体替代去离子水能够进一步提高直流输电工程的输电容量20%左右,换流阀短时过负荷能力提升1.51倍。The heat transfer performance of the phase change dispersion is obtained through our experimental and numerical simulation. The influence of the heat flux, flow rate and mass fraction on the heat transfer characteristics of the converter valve under the cooling condition of the phase change dispersion is discussed. The reliability of the model and algorithm is also verified via experiments. The results show that the average heat transfer coefficient of the phase change dispersion is almost three times that of the water. The thermal resistance of the heat sink using the phase change dispersion is 50% lower than that of the cooling water. Meanwhile, the pressure drop of the phase change dispersion is slightly increased by about 12%. Compared with the deionized water,the phase change dispersion can further increase the transmission capacity of HVDC project by about 20%, and the converter valve is increased in its short-term overload capacity.

关 键 词：换流阀 过负荷能力 冷却介质 相变乳状液 对流换热系数 

分 类 号：TM721[电气工程—电力系统及自动化]