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This paper presents the digital control scheme of a single phase uninterruptible power supply (UPS). In order to obtain fast response in the current control, the authors propose the digital control scheme based on the instantaneous values. The inverter of the UPS is connected to the load in parallel to reduce the loss of the UPS. The controller is constructed by a DSP. The control schemes in all of...
This paper presents the line loss minimization control using a UPFC (unified power flow controller) with power flow estimation in a loop distribution system. The minimization of line loss is realized by eliminating the circulating current using the UPFC in the loop system. In the control of the UPFC, all line current in the loop distribution system are necessary. Therefore, the condition and scheme...
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