一种风电变流器防凝露系统的设计与试验

Design and Experiment on Dehumidification System of Converter Cabinet in Wind Turbine

针对中国华电仰天湖风场的TW1650型风力发电机组变流柜的凝露问题,采用转轮除湿机为核心设计了一种防凝露系统,并将该系统加装在风机变流柜上进行现场试验,记录了变流柜内及机舱内、外的环境温度与相对湿度变化情况。试验结果表明,机舱外环境平均温度为17.2℃、平均相对湿度为93.1%,机舱内空气平均温度为24.9℃、平均相对湿度为53%的条件下,在防凝露系统作用下变流柜内空气相对湿度在短时间内下降至设定值(柜内空气平均相对湿度为35.7%)后便保持稳定,最低降至17.5%,同时柜内热负荷未明显增加,可见该防凝露系统能有效地对风机变流柜进行除湿防潮。

Aiming at the dewing problem of TW1650 wind turbines in Yangtianhu wind farm of China Huadian Corporation, a dehumidification system is designed with runner dehumidifier. And the field test is carried out in one wind turbine to verify the performance of the dehumidification system. Temperature and relative humidity of the air in the converter cabinet, inside and outside the nacelle are recorded during the experiment. The results show that the relative humidity of the air in the converter cabinet decreases to the set value quickly when the air humidity and temperature outside nacelle are 93.1% and 17.2 ℃ respectively, and the air humidity and temperature inside nacelle are 53% and 24.9℃ respectively the lowest relative humidity is 17.5% and the mean humidity is 35.7% meanwhile the thermal load changes little. According to the result, the dehumidification is proven to be an effective solution of dewing problem.