ABSTRACT
In this paper, we modeled the devices used in PV system easily.
Simulation tools use PSPICE to enable intuitive electrical circuit
simulations. Simulations were also performed on the effects of
temperature and spatial radiation that are easy to overlook when using
solar cells using modelled libraries. In addition, for full operation of the
photovoltaic system, a complete operation system for the DC-DC
buck-boost converter and the MPPT(Maximum Power Point Tracking)
control system was modeled and simulated to confirm good operation.
In order to verify the operation of the simulation, we constructed an
actual system with the same conditions in the simulation and
experimented. As a result, we proposed a single-phase 3 kW
grid-connected solar power converter. In addition to IGBT devices and
GaN type MOSFETs We have obtained design data that can be
diversified and increased in capacity considering the capacity.
Especially, it is confirmed that GaN type MOSFET is the next
generation switching device. It is possible to expand the switching
frequency to 200 [kHz] and greatly reduce the size of the heat sink
which can greatly improve efficiency and power factor.
In future, it can be used as a stand-alone system with ESS using
solar inverter, and it is possible to regenerate energy to the battery
power side, and it has efficiency of 95% or more and energy saving
effect is confirmed.
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