New control scheme for output voltage of three-phase UPS

被引：0
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作者：
School of Electronic and Information Engineering, South China Univ of Technology, Guangzhou 510640, China [1 ]
不详 [2 ]
不详 [3 ]
机构：
来源：
Hunan Daxue Xuebao | 2008年 / 12卷 / 42-47期
关键词：
Three term control systems - Controllers;
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摘要：
In order to improve the waveform quality of the output voltage of Uninterruptible Power Supplies (UPS), a decoupled status-space model was set up for three-phase UPS with isolated transformer. Due to the fast response characteristic of PID control and the static error free tracking characteristic of repetitive control, a new control scheme combining repetitive control with PD control was proposed, and the stability of the control system was analyzed. The structure of the improved repetitive controller is simple and easy to implement. The prototype of 30 KVA three-phase UPS has been manufactured, in which 32 bits DSP TMS320F2812 was applied as the controller. The good steady-state and dynamic-state performance of UPS system were verified by experimental results under linear and nonlinear loads. Total harmonic distortion (THD) of the output voltage is endurable.
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页码：42 / 47
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