单相UPS逆变器的滑模电流控制

Sliding-Mode Current Control of Single-Phase UPS Inverter

在对UPS 逆变器的控制设计中,本文采用了串级结构控制原理。整个系统控制分为电压环控制和电流环滑模控制。电压环控制采用自适应律来估计负载电阻,并利用输出电压的跟踪误差获得期望的电感电流;电流环滑模控制对电感电流进行调节。通过实验结果验证,该控制方案达到了很好的控制效果。

This paper adopts the cascade structure control theorem for designing the control system of UPS inverter.The whole control unit is divided into the voltage loop control and the current loop control.The voltage loop control utilizes the tracking error of output voltage to estimate the desired inductor current in which the resistive load is estimated through an adaptive law,while the current loop sliding-mode control regulates the inductor current.The control method is verified to be effective through experimental result.