DFIG网侧变流器双闭环控制策略  

Double Closed Loop Control Strategy of DFIG Grid Side Converter

作　　者：彭红义 张志敏 周振雄 PENG Hongyi;ZHANG Zhimin;ZHOU Zhenxiong(College of Electrical and Information,Beihua University,Jilin 132013,China)

机构地区：[1]北华大学电气与信息工程学院,吉林吉林132013

出　　处：《北华大学学报（自然科学版）》2020年第5期682-687,共6页Journal of Beihua University（Natural Science）

基　　金：吉林省发展和改革委员会产业技术研究与开发专项(2019C058-1);吉林省教育厅科学技术研究项目(JJKH20200042KJ);吉林省科技发展计划项目(20200404203YY).

摘　　要：针对传统双馈风力发电机(DFIG)网侧变流器控制比较复杂、鲁棒性较差、输出电压不稳定等缺点,设计了基于ADRC的直流母线电压外环和基于PID的电流内环的双闭环控制系统,通过控制变流器输出电流,达到维持网侧PWM变流器直流母线电压恒定和保持定子侧输出单位功率因数的目的.不仅能实现良好的控制效果,而且还能降低系统硬件复杂度,提高双馈风力发电机的利用效率.仿真结果表明:双闭环控制策略能有效维持网侧变流器直流母线电压稳定,保证直流电压波动较小,降低电压畸变率,具有较强的抗干扰能力.In view of the disadvantages of traditional doubly-fed induction generator(DFIG),such as complex control,poor robustness,and unstable output voltage etc,the DC bus voltage outer loop based on ADRC and the current inner loop based on PID double closed-loop control system are designed.By controlling the output current of the converter,the DC bus voltage of the PWM converter at the grid side is kept constant and the output unit power factor of the stator side is maintained.This can not only realize good control effect,but also reduce the hardware complexity of the system and improve the utilization efficiency of doubly-fed induction generator.The simulation results show that the double closed-loop control strategy can effectively maintain the DC voltage stability of the grid side converter bus,ensure that the DC voltage fluctuation is small,reduce the voltage distortion rate and have strong anti-interference ability.

关 键 词：双馈风力发电机 ADRC 双闭环控制 PWM变流器 

分 类 号：TM315[电气工程—电机]