ABSTRACT:
Hybrid
boost converter (HBC) has been proposed to replace a dc/dc boost converter and
a dc/ac converter to reduce conversion stages and switching loss. In this
paper, control of a three-phase HBC in a PV charging station is designed and
tested. This HBC interfaces a PV system, a dc system with a hybrid plugin electrical
vehicles (HPEVs) and a three-phase ac grid. The control of the HBC is designed
to realize maximum power point tracking (MPPT) for PV, dc bus voltage
regulation, and ac voltage or reactive power regulation. A test bed with power
electronics switching details is built in MATLAB/SimPowersystems for validation.
Simulation results demonstrate the feasibility of the designed control
architecture. Finally, lab experimental testing is conducted to demonstrate
HBC’s control performance.
KEYWORDS:
1. Plug-in
hybrid vehicle (PHEV)
2. Vector
Control
3. Grid-connected
Photovoltaic (PV)
4. Three-phase
Hybrid Boost Converter
5. Maximum
Power Point Tracking (MPPT)
6. Charging
Station
SOFTWARE: MATLAB/SIMULINK
Fig.
1. Topology of the three-phase HBC-based PV charging station.
EXPECTED SIMULATION RESULTS:
Fig.
2. Performance of a modified IC-PI MPPT algorithm when solar
irradiance
variation is applied.
Fig.
3. Performance of the dc voltage control in the vector control. The solid lines
represent the system responses when the dc voltage control is enabled. The
dashed lines represent the system responses when the dc voltage control
is
disabled.
Fig.
4. Performance of a proposed vector control to supply or absorb reactive power
independently.
Fig.
5. Power management of PV charging station.
Fig.
6. Dst, Md and Mq for case 4.
Fig.
7. System performance under 70% grid’s voltage drop.
CONCLUSION:
Control
of three-phase HBC in a PV charging station is proposed in this paper. The
three-phase HBC can save switching loss by integration a dc/dc booster and a
dc/ac converter converter into a single converter structure. A new control for
the three-phase HBC is designed to achieve MPPT, dc voltage regulation and
reactive power tracking. The MPPT control utilizes modified incremental conductance-PI
based MPPT method. The dc voltage regulation and reactive power tracking are
realized using vector control.
Five case studies are conducted in computer
simulation to demonstrate the performance of MPPT, dc voltage regulator, reactive
power tracking and overall power management of the PV charging station.
Experimental results verify the operation of the PHEV charging station using
HBC topology. The simulation and experimental results demonstrate the
effectiveness and robustness of the proposed control for PV charging station to
maintain continuous dc power supply using both PV power and ac grid power.
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[1]
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[3]
A. Khaligh and S. Dusmez, “Comprehensive topological analysis of conductive and
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[4]
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