单相全桥逆变器基于电容电流反馈的有源阻尼控制策略研究  

The Research on Control Strategy of Single-phase Full-bridge Inverter Based on Capacitor Current Feedback Active Damping

作　　者：汪玲 王成悦 WANG Ling;WANG Cheng-yue(Hefei Tongzhi Technology Development Co.,Ltd.,Hefei 230088,China)

机构地区：[1]合肥同智机电控制技术股份有限公司,安徽合肥230088

出　　处：《通信电源技术》2020年第7期10-14,19,共6页Telecom Power Technology

摘　　要：针对LC滤波的单相全桥逆变器由于谐振尖峰引起的系统稳定性问题,讨论和分析基于电容电流反馈的有源阻尼控制方案。通过模型的等效变换,指出电容电流反馈有源阻尼和电容并联电阻的无源阻尼是等效的。通过改变电容电流反馈的比例系数,可以提高逆变器的阻尼系数,抑制谐振尖峰。此外,在不需要额外增加滤波电容电流传感器的情况下,通过输出电感电流和负载电流实时计算电容电流。最后,通过仿真和实验验证了该控制方案的正确性和可行性。Based on the stability problem of single-phase full-bridge inverter caused by the resonance spikes,this paper discusses and analyses the capacitor-current-feedback active damping control strategy,pointing out that the capacitor-current-feedback active damping is equivalent to the capacitor paralleling resistance passive damping by equivalent transformation of model.The inverter damping coefficient can be enhanced by altering the proportionality coefficient of capacitor-current-feedback,restraining the resonance spikes.Besides,without additional capacitor current sensor,the capacitor current could be real-time computed by inductor current and load current.At last,correctness and the feasibility of this control strategy is verified by simulation and experiment.

关 键 词：单相逆变器 LC滤波器 电容电流反馈 有源阻尼 

分 类 号：TM464[电气工程—电器]