摘要
以单相PWM整流器为研究对象,以提高其DQ电流解耦控制的电流内环动态响应速度,增加算法控制精度,实现单位功率因数为目标,首先,建立整流器DQ电流解耦控制的数学模型。其次,针对单相系统坐标变换需要构造虚拟正交分量问题,分析了传统的四分之一周期延时算法与2阶广义积分（second-order generalized integrator,SOGI）算法,研究了一种基于虚拟信号反馈（virtual signal feedback,VSF）的DQ电流解耦控制算法,并给出了电感参数灵敏度分析。然后,为消除电感不匹配对功率因数的不良影响,提出了一种基于稳态q轴电流偏移的电感误差在线补偿算法。最后,对所提出算法进行了仿真和实验验证,同时与传统的延时算法和SOGI算法作对比分析,结果验证了所提算法的正确性以及有效性。
In order to improve the controller＇s dynamic response, increase the control accuracy and achieve the unit power factor of single-phase PWM rectifiers, first of all, the mathematic model of single-phase PWM rectifiers was shown. Secondly, in order to generate the virtual orthogonal component of rotational coordinate transformation in single-phase applications, the traditional quarter-cycle delay algorithm and the second-order generalized integrator（SOGI） algorithm were analyzed. The DQ current decoupling control algorithm based on virtual signal feedback（VSF） for single-phase PWM rectifiers was investigated. In addition, the inductance parameter sensitivity analysis was discussed. Then, an on-line compensation solution of inductance error with the steady-state q-axis current offset was proposed to eliminate the undesirable effect on power factor due to inductance mismatch. Finally, the proposed algorithm was verified in computer simulations and experimental tests. Meanwhile, compared with the traditional quarter-cycle delay algorithm and SOGI algorithm, simulation and experiment results show the correctness and effectiveness of the proposed algorithm.
作者
刘秉
宋文胜
LIU Bing;SONG Wensheng;School of Electrical Engineering;Southwest Jiaotong University;
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第15期4504-4513,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51577160)~~
关键词
单相PWM整流器
DQ电流解耦控制
虚拟正交分量构造算法
动态性能
电感误差在线补偿
single-phase PWM rectifiers
DQ current decoupling control
virtual orthogonal component construction algorithm
dynamic performance
the inductance error on-line compensation
