光伏电力设备屏柜自动转换警示牌的研制

Development of Automatic Conversion Warning Signs for Photovoltaic Power Equipment Cabinets

电力系统检修工作中,检修设备屏柜时,都会在相应屏柜上悬挂“在此工作”警示牌、在检修设备相邻开关柜或者继电保护屏上悬挂“运行设备”警示牌,且在检修工作结束后,要将之前悬挂的“在此工作”“运行设备”警示牌收回,这样工作量比较大。为了解决该问题,文章研制了光伏电力设备屏柜自动转换警示牌,当屏柜门关闭时,自动显示“运行设备”;当屏柜门打开时,自动显示“在此工作”,节省了悬挂“在此工作”“运行设备”警示牌的人力,且警示牌显示所需电能来自光伏电池阵列转换的太阳能,节能环保。

In the power system,a large number of power equipment cabinets are used.During each maintenance work,warning signs for"working here"are hung on the corresponding cabinets,and warning signs for"operating equipment"are hung on adjacent switchgear or relay protection screens of the maintenance equipment.After the maintenance work is completed,the previously hung warning signs for"working here"and"operating equipment"need to be retrieved,which requires a relatively large workload.To solve this problem,this article developed an automatic conversion warning sign for photovoltaic power equipment cabinets.When the cabinet door is closed,it automatically displays"running equipment";When the screen cabinet door is opened,it automatically displays"Work Here",saving manpower on hanging warning signs for"Work Here"and"Run Equipment".The warning signs also display that the required electricity comes from solar energy converted from photovoltaic arrays,which is energy-saving and environmentally friendly.