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http://dx.doi.org/10.5207/JIEIE.2014.28.1.096

The Study on Sag Detecting Scheme around Zero Crossing Voltage for Single-Phase Inverter System  

Lee, Woo-Cheol (Hankyong National University Dept. of Electrical Electronic & Control Engineering, Institute for information technology convergence)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.28, no.1, 2014 , pp. 96-104 More about this Journal
Abstract
The all pass filter generates a virtual q-axis voltage component with $90^{\circ}$ phase delay but the virtual q-axis voltage cannot detect the voltage depending on the phase of the grid voltage. To overcome the problem, q-axis voltage component is generated from difference between the current and previous value of d-axis voltage component in the stationary reference frame. However, the difference voltage between the current and previous value around the zero crossing voltage is not enough to detect the voltage sag. Therefore, the new detection scheme which can detect the sag around the zero crossing voltage is proposed.
Keywords
PLL(Phase Locks Loop); All-Pass Filter(APF); Difference Voltage; Zero Crossing Voltage;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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