基于PLC的校园照明智能控制系统设计

大学的电能消耗中，照明用电占了绝大部分，其中道路和景观照明容量大，工作时间长，且常采用手动控制方法，造成了浪费.为此，针对学生的活动规律，在新校区道路和景观照明设计时，采用了PLC智能控制.学生公寓熄灯之前一段时间，道路照明和景观灯全部开启；之后的时间，适当降低道路照度要求，一部分景观灯关闭；另外，寒暑假期间，也采用了不同的时段控制方式.该照明智能控制系统运行以来，通过测算，每年节约电能达25%以上，灯具的使用寿命也有所提高，系统稳定可靠，完全满足了学校的照明要求，达到了预想的结果.

Intelligent control design of campus lighting based on PLC

Electricity for illumination occupies most of university electricity consumption. Road and scenery illumination， with large capacity and long working hours， may cause waste of energy when it is operated manually.Therefore， according to the students' living patterns， PLC intelligent control system in the road and scenery illumination was adopted on the new campus. Some time before the blackout of students' apartments， all of road and scenery illumination lights would be turned on. Afterwards， the road illumination lights would be tuned down and some scenery illumination lights would be off. Additionally， during summer and winter holiday， the illumination lights would be controlled in different time interval. Based on estimate of operation for PLC intelligent control system，electricity saved each year is more than 25% and the lifetime of lights is also increased. The result shows that the illumination intelligent control system is reliable enough to meet the requirement of campus lighting， and the expected effect is realized．