摘要
对LCL型逆变器的谐振原因及有源阻尼的机理进行深入分析,得出有源阻尼实质是对系统谐振峰值附近对应的输出频率成分的反馈控制,当该反馈为负反馈时可以实现较好的抑制效果,且反馈深度越深,谐振峰值抑制效果越好。结合有源阻尼实质在电流双闭环控制的基础上提出一种有源电导阻尼控制策略,通过Matlab进行仿真验证,谐振抑制效果和输出电流波形都较明显改善,仿真结果证明改进后的控制算法具有可行性。
After deep analysis on resonance causes of LCL inverters and mechanism of active damping, it can be concluded that active damping refers to feedback control over output frequency corresponding to the system resonance peak. In case of negative feedbacks, better suppression results can be achieved. Therefore, as feedback gets deeper, the resonance peak will be better suppressed. According to the fact that the active damping refers to a control strategy for active conductance damping based on current double closed loop control, there are obvious improvements in resonance suppression results and output current waveforms through simulation in Matlab. As a result, it turns out the improved control algorithm is feasible.
出处
《建筑电气》
2018年第1期58-63,共6页
Building Electricity
基金
安徽省高等学校省级质量工程项目
项目名称:<电工电子技术>课程项目化教学改革研究与实践
项目编号:2016jyxm0179
关键词
LCL型滤波器
谐振抑制
有源阻尼
BODE图
双闭环控制
反馈控制
仿真
傅里叶分析图
LCL filter
resonance suppression
active damping
Bode diagram
double closed loop control
feedback control
simulation
fourier analysis diagram
