摘要
针对现有的三相全桥逆变器输出电压波形控制方案存在的动态性能差、对负载变化敏感的问题,提出了一种基于滑模控制的输出电压波形控制方案。采用外电压环、内电流环的控制结构;使用逆系统方法消除了逆变器dq轴数学模型中d轴分量和q轴分量的耦合关系;为了降低开关频率,采用了电压空间矢量脉宽调制算法。通过计算机仿真对所提方案进行了验证。仿真结果表明,方案具有较好的性能和较强的负载适应能力。
Aiming at the poor dynamic performance and sensitivity to load change in the output voltage waveform control system of three phase full bridge inverter,a control scheme based on sliding mode control method was proposed.The scheme employs a voltage outer loop and a current inner loop.In order to eliminate coupling relationship between d-axis and q-axis components in the inverter＇s mathematical model,an inverse system method is employed.Space vector pulse width modulation（SVPWM）technology is adopted to reduce the switching frequency.Finally,the simulation case based on Matlab / Simulink software was implemented to verify the controller ＇s performance.The results show that the scheme has good performance and strong adaptability to load changes.
出处
《电器与能效管理技术》
2015年第8期39-42,共4页
Electrical & Energy Management Technology
