The evaporation cooling air-conditioner is widely adopted in northwest area of China , especially in Xinjiang Autonomous Region .Its working principles , structures and practical application in hydropower plants are introduced . Considering the shortcomings of the AI temperature controller , a fuzzy PID control system based on PLC is developed , in which the fuzzy PID calculation can be easily accomplished by PLC with a special addressing mode .Field tests show that the proposed system is able to control the plant temperature accurately with remote monitoring ability and lower power consumption .%根据西北地区特别是新疆应用较为广泛的蒸发冷却空调系统特点，介绍其原理和机构及在水力发电厂中的实际应用，并针对AI温控器存在的不足，采用模糊PID设计，通过特别的寻址方式，使PLC能够简便易行地实现模糊PID计算，进而实现基于PLC的水电厂蒸发冷却空调控制。经实测该系统不仅实现了厂区温度的精准控制，而且还能远程监控，又能降低能耗。
展开▼
