基于COMSOL Multiphysics软件的某地铁配电柜温湿度控制策略
邓雷1崔光磊2
Temperature and Humidity Control Strategy of Certain Subway Power Distribution Cabinet Based on COMSOL Multiphysics Software
DENG Lei1CUI Guanglei2
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作者信息:1.武汉地铁运营有限公司, 430030, 武汉
2.东北大学辽宁省深部工程与智能技术重点实验室, 110819, 沈阳
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Affiliation:1.Wuhan Metro Operation Co., Ltd., 430030, Wuhan, China
2.Key Laboratory of Liaoning Province on Deep Engineering and Intelligent Technology, Northeastern University, 110819, Shenyang, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.04.014
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中图分类号/CLCN:U224.3;U231.5
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栏目/Col:研究报告
摘要:
［目的］运行在长江流域高温高湿环境中的配电柜，易受自然环境的影响发生内部凝露现象，引发设备受潮及故障。为避免凝露引发的配电柜故障，有必要分析凝露现象产生的机理，研究配电柜的温湿度控制策略。［方法］基于凝露引发的配电柜故障，分析了凝露现象产生的机理及主要影响因素。以中部某城市地铁配电间内配电柜为例，利用COMSOL Multiphysics仿真软件构建配电柜全尺寸多物理场耦合仿真模型。基于环境测控的历史数据进行仿真，分析配电柜内温度及湿度变化对柜内凝露现象的影响。基于2022年数据，统计自然状态下各月的凝露概率，结合仿真计算结果提出配电柜温湿度控制策略，并通过仿真计算对控制效果进行分析。［结果及结论］凝露现象同相对湿度和露点温度密切相关。6月和7月的凝露概率最高，入夜后凌晨至清晨最易发生凝露。提高配电间空调设置温度并降低环境相对湿度，可显著降低配电柜发生凝露的概率。具体控制策略为：在夏季空调制冷时，配电间内空调温度设置不宜低于26 ℃：在配电间增设除湿机，将环境相对湿度降低至75%及以下。经仿真结果验证，温湿度控制策略具有良好的防凝露效果。
Abstracts:
［Objective］ PDC (power distribution cabinet) operating in the high temperature and high humidity environment of the Yangtze River Basin are prone to internal condensation under the influence of the natural environment, resulting in equipment moisture and failure. To avoid PDC failure caused by condensation, it is necessary to analyze the formation mechanism of condensation and study the temperature and humidity control strategy of PDC. ［Method］ Based on the distribution cabinet failure caused by condensation, the mechanism and main influencing factors of condensation phenomenon are analyzed. Taking PDC in the subway power distribution room of a city in Central China as an example, COMSOL Multiphysics simulation software is used to build a full-scale multi-physics field coupling simulation model of PDC. Based on the historical data of environmental measurement and control, a simulation is carried out to analyze the impact of PDC internal temperature and humidity changes on the condensation phenomenon inside. Based on the data from 2022, the condensation probability of each month under natural conditions is statistically analyzed, and the temperature and humidity control strategy for PDC is proposed in combination with the simulation calculation results, and the control effect is analyzed through simulation calculation. ［Result & Conclusion］ Condensation is closely related to relative humidity and dew point temperature. The probability of condensation is highest in June and July, and it is most likely to occur from midnight to early morning after nightfall. Increasing the air conditioning setting temperature in the power distribution room and lowering the relative humidity of the environment can significantly reduce the probability of condensation in PDC. The specific control strategy is: when the air conditioning is cooling in summer, the air conditioning temperature in the power distribution room should not be set lower than 26 ℃: adding a dehumidifier in the power distribution room could reduce the relative humidity of the environment to 75% or below. The simulation results verify that the temperature and humidity control strategy has a good anti-condensation effect.
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