基于热电制冷技术的预制舱变电站防潮方案设计与试验

Design and Test of Moisture-proof Scheme for Prefabricated Cabin Substation Based on Thermoelectric Refrigeration Technology

目前箱式变电站、内端子箱与开关设备的防潮防凝露措施主要为通风、加热等传统模式,无法满足高温高湿环境的相对湿度调节需求。针对预制舱变电站在高温高湿运行环境下易发生舱体内部凝露的问题,开发基于热电制冷技术的冷却除湿方案,搭建预制舱防潮防凝露试验平台,通过与通风模式、加热模式进行相对湿度调节性能对比,分析不同加湿源条件下3种除湿模式的除湿效果。研究发现:通风模式能耗低,但适用范围受限制;加热模式可调节相对湿度,但无法从根本上降低含湿量,且易形成高温高湿环境;基于热电制冷技术的冷却除湿模式可有效降低含湿量,而且适应性强,功耗低。

Current main measures to prevent moisture and condensation in the box-type substations,internal terminal boxes and switchgears are traditional modes such as ventilation,heating,and so on,which are unable to meet the requirement for relative humidity regulation of high temperature and high humidity environments.In view of that the prefabricated substation is easy to come up with a problem of condensation inside the cabin in high temperature and high humidity environment,this paper develops a dehumidification solution based on thermoelectric refrigeration technology,builds a test platform for moisture and condensation prevention in the prefabricated cabin.By comparing the relative humidity regulation performance in the ventilation mode and the heating mode,it analyzes the dehumidification effects of the proposed solution of three different humidification sources and modes.The study concludes that the ventilation mode is low in energy consumption but limited in application,the heating mode can adjust the relative humidity but can’t radically reduce the moisture content and is prone to form high temperature and high humidity environment.The refrigeration and dehumidification mode based on thermoelectric refrigeration technology can effectively reduce the moisture content and is highly adaptable with low power consumption.