智能端子箱防凝露控制器的研制与试验研究

Development and Researching of Intelligent Controller for Preventing Condensation in Terminal Box

提出了一种智能型户外端子箱防凝露控制方法,通过同时采集箱内、外温湿度信息,将两组信息进行智能处理,得出加热器和排风扇的控制条件判定,达到端子箱主动防凝露的目的。研制出了整套智能防凝露试验装置,并在多个变电站进行了长时间的现场试验,获得了良好的效果。与传统的加热除湿装置比较,本装置直接控制箱内露点条件,具备良好温湿度控制曲线和平稳的控制性能;采用低功率远红外加热器配合小排量风扇的控制方式替代目前普遍使用的单一电加热器,除湿快,箱内温升小,加热时间短,节能效果非常显著。

In this paper, a control method to prevent condensation in intelligent outdoor terminal box is presented. It prevents condensation forwardly by collecting the information of temperature and humidity inside and outside of the terminal box and processing the collected information by intelligent method to get the determinant control condition of the heater and the fan. In addition, the intelligent device to prevent condensation has been developed. With the long-term field test in several substations, the experimental device attains favorable effect. Comparing with the traditional device by heating and dehumidifying, the device controls the condensation point in the box directly, and has a better control curve and steady control performance. The new device uses the fan with less amount of exhaust and uses the infrared heater instead of the electrical heater in use, and it dehumidifies quickly, has small temperature rise, short time for heating and obvious energy-saving effect.