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电流源型PWM整流器交直流侧解耦控制策略研究
Research on AC and DC Side Decoupling Control Strategy of Current Source PWM Rectifier
投稿时间:2018-06-03  修订日期:2018-08-28
DOI:
中文关键词:  电流源型整流器  状态反馈  有源阻尼  单位功率因数
英文关键词:current source rectifier  state feedback  active damping  unity power factor?
基金项目:
作者单位E-mail
肖蕙蕙 重庆理工大学电气与电子工程学院 448900451@qq.com 
奥琳芳 重庆理工大学电气与电子工程学院 448900451@qq.com 
郭强 重庆理工大学电气与电子工程学院 448900451@qq.com 
李山 重庆理工大学电气与电子工程学院 448900451@qq.com 
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中文摘要:
      针对三相电流源型PWM整流器(CSR)作为恒压源输出时,直流侧并联大电容,使得系统建模复杂度及控制难度大大增加这一问题。本文采用了一种PWM整流器交直流侧解耦控制策略。首先将d 轴定向于交流侧电容电压矢量,简化d-q坐标系下动态数学模型,采用虚拟电阻有源阻尼控制法,增加系统阻尼,消除LC滤波频率特性中的谐波尖峰,降低交流侧控制对直流侧影响并提高系统稳定性;同时为保证系统快速响应的动态特性,简化控制系统设计,直流侧采用状态反馈控制来稳定直流母线电压;其次,通过调节q轴开关分量来实现网侧单位功率因数运行;最后采用MATLAB/Simulink仿真验证该控制策略的合理性和可行性。
英文摘要:
      To simplify the difficulty of system modeling and control complexity, when three phase current source PWM rectifier (CSR) are applied as dc voltage power supply in the dc bus. In this paper, a decoupling control strategy for ac and dc side of PWM rectifier is adopted. By aligning the vector of the ac capacitor voltage to the d-axis, the dynamic model of the CSR can be simplified in the d-q rotating frame. Based on this model, The active damping control of virtual resistance method is used to increase the damping of the system, eliminate the harmonic peaks of the LC filter’s frequency characteristic, diminish the influence on DC side by controlling ac side, and enhance the stability of the system. Meanwhile, to ensure the fast dynamic response of the system and simplify the design of the control system, the state-variable feedback control method is applied for the dc side. Moreover, a unity power factor of the CSR is achieved by regulating the q component of the bridge currents. Simulation results are presented to validate the performance of the proposed control strategy in MATLAB/Simulink.
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