Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于光伏并网逆变器的一种滞环电流控制技术

来源:电工电气发布时间:2021-12-16 11:16 浏览次数:424

基于光伏并网逆变器的一种滞环电流控制技术

高鑫,王斌,罗云雷,刘德文
(宁夏大学 物理与电子电气工程学院,宁夏 银川 750021)
 
    摘 要:在三相光伏并网逆变器系统的设计中,滞环电流控制策略具有开关频率高、电流谐波失真较大等问题。介绍了一种空间矢量-不对称双滞环电流控制方法,在 MATLAB/Simulink 仿真平台分别搭建了基于三相静止坐标系下与两相静止坐标下的仿真模型,在并网电流与电网电压、开关频率、功率因数等方面对两种控制策略进行对比分析,仿真结果验证了空间矢量-不对称双滞环电流控制方法能够在一定程度上减小开关频率,降低输出电流的总谐波失真。
    关键词:并网逆变器;滞环电流控制;空间矢量-不对称双滞环电流控制;开关频率
    中图分类号:TM464 ;TM615     文献标识码:A     文章编号:1007-3175(2021)12-0001-06
 
A Hysteresis Current Control Technique of
Photovoltaic Grid-Connected Inverters
 
GAO Xin, WANG Bin, LUO Yun-lei, LIU De-wen
(School of Physics and Electronic-Electrical Engineering, Ningxia University, Yinchuan 750021, China)
 
    Abstract: The hysteresis current control strategy is a significant part of the three-phase photovoltaic grid-connected inverter system design. This part has problems, such as high switching frequency and comparatively bigger current harmonic distortion.This paper introduces a space vectorasymmetric double hysteresis current control method.This research built simulation models in the platform of MATLAB/Simulink based on a threephase static coordinate system and two-phase static coordinate system.Both control strategies are compared and analyzed from different angles, such as grid-connected current, grid voltage, switching frequency, power factor, etc.The results verify that the space vector-asymmetric double hysteresis current control method is effective.It can reduce the switching frequency, lower the total harmonic distortion of the output current.
    Key words: grid-connected inverter; hysteresis current control; space vector-asymmetric double hysteresis current control; switching frequency
 
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