基于PLC模糊PID控制的变频恒压供水系统研究  

Variable Frequency Constant Pressure Water Supply Systems Based on PLC and Fuzzy PID

作　　者：范子荣 Fan Zirong

机构地区：[1]山西大同大学机电工程学院,山西大同037003

出　　处：《工业控制计算机》2020年第9期100-101,共2页Industrial Control Computer

基　　金：大同市应用基础研究计划项目(2019157)。

摘　　要：针对供水系统供水质量低下的情况,提出了以S7-300 PLC、变频器和自适应模糊PID为核心的智能供水系统。系统运行时,由压力变送器不停地采集管网中的数值,并将该值转换为电信号,并将此电信号传输给PLC,PLC将此水压水位值与给定值进行比较,再根据模糊PID控制算法计算出相应的控制量来实时控制变频器的输出频率,用于控制电机转速,从而使系统水压恒定不变,如发生偏差,立即报警。In view of the low quality of water supply systems,an intelligent water supply system,based on S7-300 PLC,frequency converter and self-adapting fuzzy PID is proposed in this paper.During the operation of the system,the pressure transmitter continuously collects the value in the pipe network and converts the value into an electrical signal,which is transmitted to PLC,which compares the value of the water pressure and water level with the given value,then according to the fuzzy PID Control Algorithm the corresponding control amount is calculated to control the output frequency of the converter,which is used to control the motor speed,so that the system gets constant water pressure.If the deviation takes place,alarm is called immediately.

关 键 词：变频恒压供水系统 PLC 模糊PID控制 

分 类 号：TU991.62[建筑科学—市政工程] TP273[自动化与计算机技术—检测技术与自动化装置]