基于模糊PID控制的同步电动机功率因数调节  

Power Factor Adjustment of Synchronous Motor Using Fuzzy PID Control

作　　者：谢慕君[1] 肖婷婷[1] 步伟明[1] 

机构地区：[1]长春工业大学电气与电子工程学院,吉林长春130012

出　　处：《电机与控制应用》2014年第1期14-18,共5页Electric machines & control application

基　　金：吉林省科技厅计划项目(2011115151)

摘　　要：针对工业中广泛使用感性负载,从电网中吸收滞后无功功率,降低电网功率因数的现象,利用同步电机可以通过改变转子绕组的励磁电流来调节功率因数的特点,设计了同步电机的恒功率因数闭环控制系统,使电机工作在过励状态,充分发挥同步电动机的无功补偿能力。鉴于工程中采用的常规PID控制依赖于控制对象的精确模型且参数不能在线调整的问题,采用模糊PID参数自整定控制方法。通过MATLAB建立同步电机恒功率因数控制系统的仿真模型,并对负载突变、电网电压变化及电机参数变化三种情况进行仿真试验。仿真结果表明,该控制系统能够实现恒功率因数调节,方法可行有效。The constant power factor closed-loop control system of synchronous motor was designed, to solve widely existence of inductive loads which absorbed lagging reactive power and reduced the power factor, which utilized the characteristic that synchronous motor was used by being changed field current of rotor, working in over- excitation condition, playing the use of reactance compensation capability. A method of fuzzy PID parameter self- tuning control was adopted for the problem of conventional PID control depending on the model accuracy and parameters being adjusted online in project. The simulation model of constant power factor control system for synchronous motor was established in MATLAB. The load sudden change, changes of network voltage and motor parameters were carried out simulation test. The simulation results showed the proposed method was feasible and effective in practice.

关 键 词：同步电动机 励磁电流 功率因数 模糊PID控制 

分 类 号：TM301.2[电气工程—电机]