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三相VIENNA整流器的控制策略研究

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为了降低三相VIENNA整流器交流侧的电流畸变率,并抑制直流侧电容中点的电位波动,提出将无源控制和零序分量注入相结合的控制策略,并应用于三相VIENNA整流器.首先,根据VIENNA整流器在三相静止坐标系下的数学模型,通过坐标变换获得在同步旋转坐标系下的电压和电流关于功率开关的状态方程.然后,根据无源控制理论,建立基于三相VIENNA整流器的欧拉-拉格朗日(Euler-Lagrange,EL)数学模型,并推导出无源控制器的电压调制方程.同时,设计将零序分量注入调制波的中点电位平衡控制模块.最后,通过构建仿真模型对控制策略进行验证.仿真结果显示,与传统的控制策略相比,该控制策略能较好地平衡电容电压中点电位,降低输入电流的畸变率,并在单位功率因数下实现系统的稳定运行.
Research on control strategy of three-phase VIENNA rectifier
In order to reduce the current distortion rate of the AC side of the three-phase VIENNA rectifier and to suppress the potential fluctuation of the midpoint of the capacitor on the DC side,this paper proposes to ap-ply the control method of passive control and zero-sequence component injection to the three-phase VIENNA rectifier.Firstly,based on the mathematical model of the VIENNA rectifier in the three-phase stationary coordi-nate system,the equations of state of the voltages and currents with respect to the power switches in the syn-chronous rotating coordinate system are obtained after a coordinate transformation.Then the Euler-Lagrange mathematical model based on the three-phase VIENNA rectifier is established by the passive control theory,and the voltage modulation equation of the passive controller is derived analytically.At the same time,a mid-point potential balance control module for injecting zero-sequence components into the modulating wave is de-signed.Finally,the proposed control strategy is verified and analyzed by building a simulation model.Simula-tion results show that the control strategy proposed in this paper results in a more balanced capacitor voltage midpoint potential for the three-phase VIENNA rectifier compared to the conventional control,the input current exhibits a lower distortion rate,and the system is achieved to operate reliably at unit power factor.

VIENNA rectifierpassivity-based controlneutral-point balancezero-sequence component injection

雪晓菲、聂冬、贺伟、豆黎明

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河南城建学院,河南 平顶山 467036

许继电气股份有限公司,河南 许昌 461000

VIENNA整流器 无源控制 中点电位平衡 零序分量注入

河南省科技攻关计划河南城建学院学术带头人项目河南省本科高等学校青年骨干教师培训计划

232102210163YCJXSJSDTR2023062023GGJS141

2024

河南城建学院学报
河南城建学院

河南城建学院学报

影响因子:0.457
ISSN:1674-7046
年,卷(期):2024.33(3)