除湿技术在变电设备运行中的应用

发布时间：2019-06-01 11:58

【摘要】：电力系统大量箱柜设备存在防潮难题,湿度过大给设备安全运行带来极大的危害。面对诸如变电站户外端子箱、开关柜和端子箱等内部空间狭小、对干燥程度要求较高的设备,传统除湿干燥手段效果不佳,亟需一种行之有效的电力箱柜除湿解决方案。论文分析了电力箱柜内部湿度过大造成绝缘下降,甚至导致设备绝缘击穿和放电故障、影响电力设备的稳定运行和可靠供电的情况,分析传统除湿方式无法对电力箱柜内部进行有效除湿,并给出了采用制冷原理除湿的技术特征。根据制冷除湿技术原则,基于半导体材质的热电制冷技术-珀尔贴(Peltier)效应及现场应用要求,研发了一种半导体制冷型除湿器,包括半导体制冷、控制以及气流循环等三大部分,对半导体器件选型、除湿器工作模式和控制算法做了具体设计。将所研发的半导体除湿器分别应用在高压柜和端子箱中,采用“湿度越限启动+延时”的全自动工作模式,考虑了加装必要的排水管等措施,取得了较好的效果。本文是对现场运行设备除湿技术的改进,将“气水分离”的半导体制冷除湿技术引入变电箱柜设备,有效降低了柜内空气湿度,减小了湿度过大引起设备故障、爆炸的风险,提升了设备安全稳定运行水平和可靠供电能力,在江苏电力系统获得大量应用,成效显著,具有较高的经济效益和推广价值。
[Abstract]:A large number of cabinet equipment in power system has moisture-proof problems, and excessive humidity brings great harm to the safe operation of the equipment. In the face of equipment such as outdoor terminal box, switchgear and terminal box of substation, which have narrow internal space and high drying degree, the effect of traditional dehumidification drying method is not good, so it is urgent to have an effective dehumidification solution for power box cabinet. In this paper, the excessive humidity in the power box cabinet leads to the insulation decline, and even leads to the insulation breakdown and discharge failure of the equipment, which affects the stable operation and reliable power supply of the power equipment. This paper analyzes that the traditional dehumidification method can not effectively dehumidify the interior of the power box cabinet, and gives the technical characteristics of dehumidification by using the refrigeration principle. According to the principle of refrigeration dehumidification technology, based on the (Peltier) effect of semiconductor material thermoelectric refrigeration technology and its field application requirements, a semiconductor refrigeration dehumidifier, including semiconductor refrigeration, is developed. The selection of semiconductor devices, the working mode of dehumidifier and the control algorithm are designed in three parts, such as control and air circulation. The developed semiconductor dehumidifier is applied to high voltage cabinet and terminal box respectively, and the automatic working mode of "humidity over limit start delay" is adopted, and the necessary drainage pipes are taken into account, and good results are obtained. In this paper, the dehumidification technology of field operation equipment is improved, and the semiconductor refrigeration dehumidification technology of "gas-water separation" is introduced into the substation cabinet equipment, which effectively reduces the air humidity in the cabinet and reduces the risk of equipment failure and explosion caused by excessive humidity. The safe and stable operation level and reliable power supply capacity of the equipment have been improved, and a large number of applications have been made in Jiangsu power system, which has achieved remarkable results and has high economic benefits and popularization value.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM63

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