脉宽调制整流器直接平均功率控制

发布时间：2018-06-24 19:19

本文选题：脉宽调制整流器 + 平均功率　；参考：《电力系统自动化》2014年05期

【摘要】：直接功率控制作为脉宽调制(PWM)整流器的一种经典高性能控制方法,具有动态响应快速、无需电流内环整定和参数鲁棒性好等优点,其不足之处是:稳态时功率脉动较大,网侧电流含有较多谐波分量,需要高速AD采样。在PWM整流器的预测功率模型基础上,提出了直接平均功率控制,其特点是在一个控制周期内,将一部分时间分配给从矢量表中得到的非零矢量,其余时间则由零矢量作用。通过控制一个控制周期内有功功率的平均值与参考值相等,从而解析得到非零矢量的作用时间。实验结果表明,该方法能够在保持传统矢量表直接功率控制的良好动态性能和单位功率因数运行的同时,有效抑制稳态时有功功率的脉动,减少网侧电流谐波和总谐波失真。
[Abstract]:As a classical high performance control method for PWM rectifier, direct power control (DPC) has the advantages of fast dynamic response, no need for internal loop setting of current and good robustness of parameters. The current on the grid side contains more harmonic components, so high speed AD sampling is needed. Based on the predictive power model of PWM rectifier, a direct average power control (DAPC) is proposed. In a control period, a part of the time is allocated to the non-zero vector from the vector table, and the rest time is acted on by the zero vector. By controlling the average value of active power in a control period is equal to the reference value, the time of action of the nonzero vector is obtained analytically. The experimental results show that the proposed method can effectively suppress the pulsation of active power in steady state and reduce the current harmonic and total harmonic distortion of the grid side while maintaining the good dynamic performance and unit power factor operation of the traditional direct power control of the vector table.
【作者单位】：北京市电力电子与电气传动工程研究中心北方工业大学;
【基金】：国家自然科学基金资助项目(51207003,51347004) 北京市科技新星计划资助项目(xx2013001) 重庆市自然科学基金资助项目(cstc2012jjB107)~~
【分类号】：TM461

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