scholarly journals Single-Phase Series Type Quasi Z-Source Voltage Sag-Swell Compensator for Voltage Compensation of Entire Region

2013 ◽  
Vol 18 (4) ◽  
pp. 322-332
Author(s):  
Jun-Hyun Eom ◽  
Young-Gook Jung ◽  
Young-Cheol Lim
Keyword(s):  
Single Phase ◽  
Voltage Sag ◽  
Entire Region ◽  
Voltage Compensation ◽  
Source Voltage ◽  
Series Type

scholarly journals A Single-Phase Embedded Z-Source DC-AC Inverter

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Se-Jin Kim ◽  
Young-Cheol Lim
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Input Voltage ◽  
Source Voltage ◽  
Output Capacitor

In the conventional DC-AC inverter consisting of two DC-DC converters with unipolar output capacitors, the output capacitor voltages of the DC-DC converters must be higher than the DC input voltage. To overcome this weakness, this paper proposes a single-phase DC-AC inverter consisting of two embedded Z-source converters with bipolar output capacitors. The proposed inverter is composed of two embedded Z-source converters with a common DC source and output AC load. Though the output capacitor voltages of the converters are relatively low compared to those of a conventional inverter, an equivalent level of AC output voltages can be obtained. Moreover, by controlling the output capacitor voltages asymmetrically, the AC output voltage of the proposed inverter can be higher than the DC input voltage. To verify the validity of the proposed inverter, experiments were performed with a DC source voltage of 38 V. By controlling the output capacitor voltages of the converters symmetrically or asymmetrically, the proposed inverter can produce sinusoidal AC output voltages. The experiments show that efficiencies of up to 95% and 97% can be achieved with the proposed inverter using symmetric and asymmetric control, respectively.

On the application of single-phase voltage sag compensators in three-phase systems

2015 ◽  
Author(s):  
Igor A. Pires ◽  
Felipe Dias de Oliveira ◽  
Sidelmo M. Silva ◽  
Braz De J. Cardoso Filho
Keyword(s):  
Single Phase ◽  
Voltage Sag ◽  
Phase Voltage ◽  
Three Phase ◽  
Phase Systems
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