| 引用本文: | 马宏伟,李永东,郑泽东,许 烈.一种PWM整流器的模型预测控制方法[J].电力自动化设备,2013,33(11): |
| MA Hongwei,LI Yongdong,ZHENG Zedong,XU Lie.Model predictive control of PWM rectifier[J].Electric Power Automation Equipment,2013,33(11): |
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| 摘要: |
| 为了提高脉冲宽度调制（PWM）整流器的动态响应速度，降低其对系统参数的依赖性，提出了一种改进的模型预测控制（MPC）方法。该方法以PWM整流器的一阶差分方程为预测模型，采用不同的控制周期分别对内环电流和外环电压进行预测，并实现对性能函数的优化求解，将传统MPC的三元高阶受限最优解问题转换为一个二元一阶非受限最优问题和一个一元一阶非受限最优问题，克服了传统MPC运算量大、难以实时控制的缺点，同时保留了传统MPC优化控制、反馈校正等优点。实验结果表明，相比于传统的矢量控制，所提方法能够有效提高PWM整流器的响应速度，并显著提高系统的鲁棒性，改进系统控制性能。 |
| 关键词: 整流器 模型预测控制 比例积分控制 鲁棒性 PWM |
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| Model predictive control of PWM rectifier |
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MA Hongwei, LI Yongdong, ZHENG Zedong, XU Lie
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School of Electrical Engineering，Tsinghua University，Beijing 100084，China
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| Abstract: |
| An improved MPC（Model Predictive Control） method is proposed to enhance the dynamic response and robustness of PWM rectifier，which takes the first-order differential equations as its prediction model and applies different control cycles to predict the outer-loop voltage and the inner-loop current respectively. The optimized solution of performance function is achieved by converting a traditional three-variable high-order limited MPC optimization into a two-variable one-order unlimited optimization plus a one-variable one-order unlimited optimization，which avoids the considerable computation of traditional MPC for real-time control while keeps its optimal control and feedback correction. Experimental results show that，compared with the traditional vector control，the proposed method improves the dynamic response and system robustness of PWM rectifier，as well as the control performance of system. |
| Key words: electric rectifiers model predictive control proportional integral control robustness pulse width modulation |
