摘要
为了实现三相整流器在三相电压不对称情况下能够正常工作,并实现三相电流对称、功率因素单位化。本文在分析了三相不平衡电压特性的基础上,提出了基于双二阶广义积分器锁频环的不对称三相整流控制策略,通过双二阶广义积分器锁频环有效地实现三相不对称电压的正负零三序分离,经过比例谐振(PR)控制环节使网侧三相电流能够无差的跟踪指定的三相正序电流,有效的消除了负序分量的干扰,实现不平衡电压的控制作用。使用Matlab/Simulink搭建仿真模型并进行仿真研究。经实验验证,这种控制策略能够有效的实现三相不平衡电压的可控整流,能够实现网侧电流三相对称及功率因素可调。
In order to make the three-phase rectifier work normally under unbalanced three-phase voltage, and make the three-phase current symmetrical, and let the power factor be unit, that this paper has analysis the characteristics of the unbalanced three-phase voltage, and put forward the control strategy of Asymmetric three-phase rectifier based on dual second order generalized integrator-frequency locked loop（DSOGI-FLL）. The unbalanced three-phase voltage can be separated into three sequence of the positive one and negative one and zero one by DSOGI-FLL. Then the three-phase current on the power grid side can track the specified positive current without the interference of the negative sequence component. So the unbalanced voltage can be controlled effectively. The simulation model has been built and study by using Matlab/Simulink. The experiments show that this control strategy can effectively make the unbalanced voltage rectifier under control and the three-phase net side current symmetry and the power factor adjusted.
出处
《电力学报》
2015年第3期228-232,242,共6页
Journal of Electric Power
关键词
不对称整流
双二阶广义积分器
锁频环
PR控制
正序电流
asymmetric rectifier
dual two order generalized integrator
frequency locked loop
PR control
positive current
