并网逆变器的分裂电容无源阻尼设计与控制  

Design and Control of Grid-connected Inverter Based on Split-capacitor Passive Damping

作　　者：刘莹[1] 于仲安[1] 邹浩[1] 

机构地区：[1]江西理工大学电气工程与自动化学院,江西赣州341000

出　　处：《河南科技大学学报（自然科学版）》2016年第3期53-57,63,共6页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51177066)

摘　　要：针对电感电容电感(loop capacitor loop,LCL)滤波的三相并网逆变器控制存在的谐振问题,结合分裂电容和无源阻尼两种方法,提出了分裂电容无源阻尼方案以及参数设计方法。首先,比较分析了分裂电容无源阻尼方案和完全电容阻尼方案之间的能量损耗与分裂电容容值比的关系;其次,分析了不同频率下能量损耗与分裂电容容值比的关系,使分裂电容容值比参数得到了进一步的优化。通过建立的MATLAB/Simulink仿真模型验证了该参数设计能够更有效地抑制谐振问题,降低并网电流总谐波畸变率和能量损耗,提高了系统的稳定性和动态性。In order to solve the problems of resonance in three phase grid-connected inverter control with loop capacitor loop( LCL) filter,a split-capacitor passive damping method and parameter design were proposed by combining the split capacitor with passive damping. Firstly,the relationships between energy consumptions and split-capacitor capacitance ratio were analyzed,which were in split-capacitor passive damping scheme and in unsplit-capacitor passive damping scheme. Then the relationships between split-capacitor capacitance ratio and energy consumptions in different frequencies were analyzed. The split-capacitor capacitance ratio was further optimized. Finally,the MATLAB / Simulink simulation model was established. The simulation results show that the designed parameters can suppress resonance problem more effectively,reduce grid-connected current total harmonic distortion and power loss,and improve systematic stability and dynamic.

关 键 词：三相并网逆变器 LCL滤波器 分裂电容 无源阻尼 

分 类 号：TM464[电气工程—电器]