Development of Photovoltaic Inverter used Grid-Connected
Distributed Power
Jeong-Do Kim
Department of Electrical Engineering Graduate School
Pukyong National University
Abstract
This paper relates to grid-connected single-phase inverter
system, the proposed system is a gate pulse signal was added to
the active auxiliary resonant circuit in the bridge arm of a
conventional grid-connected single-phase half-bridge inverter,
main switch is modulated by the SPWM method by configuring
so that the, take a feature that can control the multi-phase
alternating current can be used in the batch phase inverter.
And active by the secondary resonance also work during the
snubber circuit a dead time period, soft switching is possible
because it actually turns a basic switch in the on state-off and
resonant operation after turning the other main switch-which was
applied to the whole of the gate signal have the characteristic.
Further, when the conventional program is shorter than the
width of the gate pulse signal active auxiliary resonant snubber
operation time in the operation in the hard switching to occur
even if the H, L is the reverse of the gate pulse signal.
This power supply is in reversal of the power supply circuit
is a short circuit may possibly be damaged since. To prevent
this, this paper has set the ARCP operation time and modulation
rate settings and processes the pulse of the gate pulse signal
reversal was the program not to occur.
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Further, as the main switch is in the off state to the time
when the other switch is turned on, and the dead time is a
hard switching method in case of the conventional method to
sequence the switching pattern 1.5[μs], While for setting the
dead time of the soft switching system with 2.0[ms], For this paper
the sequence switching patterns applied to the soft-switching
method is 4.0[μs] because the pulse width of the hard-switched
at the same modulation rate and time to get a high density to
suppress the resonant inductor current as a whole small effect
of improving the efficiency have.
Running a soft switching operation by the switching pattern
sequence scheme applied to the paper, it is possible to suppress
the surge voltage and the surge current, the generation of
noise of the device is reduced as compared to the effect of the
hard switching method.
LINK:
http://www.mediafire.com/file/1dyn6jy9g5767gj/PHOTOVOLTAIC_INVERTER.pdf
