电气工程学报 ›› 2018, Vol. 13 ›› Issue (6): 1-6.doi: 10.11985/2018.06.001

• 理论研究 •    下一篇

电压型PWM整流器无模型预测电流控制

张永昌,焦健,刘杰   

  1. 北方工业大学电力电子与电气传动北京市工程研究中心 北京 100144
  • 收稿日期:2017-12-12 出版日期:2018-06-25 发布日期:2018-06-25
  • 作者简介:张永昌 男 1982年生, 博士,研究员,主要研究方向为模型预测控制在电力电子与电机控制中的应用。|焦 健 男 1993年生,硕士研究生,主要研究方向为双馈电机及PWM整流器模型预测控制。

Model-Free Predictive Current Control of the Voltage Source PWM Rectifier

Zhang Yongchang,Jiao Jian,Liu Jie   

  1. Power Electronics and Motor Drive Engineering Research Center of Beijing North China University of Technology Beijing 100144 China
  • Received:2017-12-12 Online:2018-06-25 Published:2018-06-25

摘要:

模型预测控制近年来在电压型PWM整流器上得到深入研究,具有原理简单、动态响应快、易于实现等优点,其不足之处是计算量大且需要精确的系统模型和系统参数。通过分析PWM整流器模型,结合预测控制算法与快速矢量选择,得到直接电流控制方法。该方法可通过一次预测计算和比较得到当前时刻使得控制效果最好的一个矢量,简化后得到无模型预测电流控制,其特点是每个控制周期内仅需对电网电流进行一次采样,不依赖于整流器模型和参数。该方法鲁棒性强且动态、稳态性能良好。本文从稳态、动态性能和鲁棒性等方面对直接电流控制和无模型预测电流控制进行了对比,实验结果证明了两种方法的正确性和有效性。

关键词: PWM整流器, 直接电流控制, 无模型预测电流控制, 鲁棒性

Abstract:

Model predictive control in voltage source PWM rectifier has been extensively studied for many years, which has several advantages such as simple principle, fast dynamic response and easy implementation. However, it poses high computational burden and requires the accurate system model and parameters. By analyzing the mathematical model of PWM rectifier, and combining prediction control and fast vector selection, a direct current control (DCC) is obtained. This method can select the optimal vector through only one prediction and comparison. Then the proposed DCC can be simplified into a new model-free predictive current control (MFPCC), which is characterized by sampling the grid current only once in each control cycle and is independent of the rectifier model and parameters. This method has strong robustness and good dynamic and steady state performance. A comparative study between DCC and MFPCC is carried out in terms of steady state performance, dynamic response and robustness. Finally, the correctness and effectiveness of those methods is experimentally validated.

Key words: PWM rectifier, direct current control, model-free predictive current control, robustness

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