摘要
将一种三相四桥臂逆变器的拓扑结构应用于动态电压恢复器主电路。具有直流电压利用率高、无需大的直流电容,不需要对直流电压进行附加控制等优点。同时,采用基于abc坐标系的三相四桥臂逆变器空间矢量调制方法,在此基础上,提出动态电压恢复器的滑模变结构控制器设计方法。消除了负载电流扰动对系统控制性能的影响。最后在理论分析基础上,通过仿真对上述方法进行了验证。仿真结果表明,上述方法具有较理想的动态和静态性能。
A three-phase four-leg inverter topology for Dynamic Voltage Restorer （DVR） was applied. Compared to classical four-wire three-leg with split capacitor topology, the four-wire four-leg topology has the advantage of higher DC voltage utilization ratio, smaller capacitor used on DC side and no additional control to the voltage value of two DC capacitors. A space vector modulation algorithm using abc coordinates was introduced. Based on this algorithm, a sliding mode variable structure control method on DVR was presented. The influence of the load current disturbance to system control performance was eliminated. At last, simulation was proceeded to verify the controller performance. The simulation results showed that the method mentioned in this paper has perfect performance.
出处
《电力科学与工程》
2008年第4期5-8,共4页
Electric Power Science and Engineering
关键词
动态电压恢复器
三相四桥臂
空间矢量调制
滑模变结构控制
Dynamic Voltage Restorer （DVR）
three-phase four-leg
space vector modulation
sliding mode variable structure control
