自适应滞环电流控制逆变器复合控制策略  

Hybrid control strategy of inverter with adaptive hysteresis current control

作　　者：彭传彪[1] 王少坤[1] 王晓锋[1] 侯振义[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《电力自动化设备》2011年第7期42-47,共6页Electric Power Automation Equipment

摘　　要：针对传统滞环电流控制下双Buck逆变器功率管开关频率不固定导致开关管损耗大、输出电压中的谐波频率范围广的缺点,采用滞环宽度可以根据逆变器电气参数实时调整的自适应滞环电流控制策略,使得开关频率基本保持固定,且滞环宽度按照2倍输出频率余弦变化。同时在电压外环中采用数字PID控制和重复控制相结合的复合控制策略,减小波形失真,改善动态特性。仿真结果表明,该复合控制策略具有可行性和实用性。As the unstable switching frequency of dual Buck inverter under conventional hysteresis current control causes the great power loss of switch tube and wide harmonic range of output voltage,an adaptive hysteresis current control is applied to adjust in real time the hysteresis bandwidth according the electric parameters of inverter for keeping the switching frequency invariable.The bandwidth changes in terms of the cosine with doubled frequency of output waveform.Hybrid control strategy combining digital PID control and repetitive control is applied in the external voltage loop to achieve less waveform distortion and better dynamic performance.Simulative results demonstrate its feasibility and practicability.

关 键 词：滞环 自适应控制系统 逆变器 PID控制 重复控制 

分 类 号：TM714.3[电气工程—电力系统及自动化]