并网逆变器全等效并联电阻有源阻尼控制方法  

Active Damping Control Method of Fully Equivalent Shunt Resistor for Grid-connected Inverter

作　　者：朱江舸 李飞[1] 凤强 吴金涛 ZHU Jiangge;Student Member;CPSS;LI Fei;FENG Qiang;WU Jintao(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《电源学报》2024年第5期143-149,共7页Journal of Power Supply

基　　金：国家自然科学基金资助项目(52177175)。

摘　　要：虚拟电阻并联电容有源阻尼法是在电容并联电阻无源阻尼法的基础上通过反馈电容电流,从控制算法上达到对并联电阻的虚拟,实现对输出滤波器谐振峰的有源阻尼。针对现有虚拟电阻并联电容法无法实现并联电阻的严格等效,带来了动态性能欠佳的问题,通过控制框图的变换,提出1种基于电容电压与电容电流反馈的全等效并联电阻有源阻尼控制方法,实现了电容并联电阻无源阻尼法严格意义上的等效,并通过对系统主导极点的分析得出:相较于基于电流环的虚拟电阻并联电容法,所提全等效并联电阻有源阻尼控制方法可以有效增加系统的阻尼比,提高系统的响应速度,减小超调量。最后,仿真和实验结果验证了该方法的有效性。Based on the passive damping method of capacitor in parallel with resistor,the active damping method of virtual resistor in parallel with capacitor can complete the virtualization of shunt resistor using the control algorithm and realize the active damping of the resonant peak from the output filter through the capacitor current feedback.However,the existing method of virtual resistor in parallel with capacitor cannot achieve a strict equivalence of shunt resistance,which leads to the problem of poor dynamic performance.To solve this problem,through the transformation of the control block diagram,an active damping control method of fully equivalent shunt resistor based on capacitor voltage and capacitor current feedback is proposed,thus realizing the strict equivalence of passive damping method of capacitor in parallel with resistor.At the same time,the active damping control method of fully equivalent shunt resistor is obtained through the analysis of dominant poles of the system.Compared with the method of virtual resistor in parallel with capacitor based on the current loop,this method can effectively improve the damping ratio and response speed of the system while reducing the overshoot.Finally,simulation and experimental results verified the effectiveness of the proposed method.

关 键 词：有源阻尼法 全等效并联电阻 逆变器谐振抑制 动态性能 

分 类 号：TM61[电气工程—电力系统及自动化]