Presentasi fortei

FORUM PENDIDIKAN TINGGI TEKNIK ELEKTRO INDONESIA (FORTEI)
ITB Bandung, 2-4 June 2014
Dr. Subiyanto
Teknik Elektro, Fakuktas Teknik, UNNES
Bandung, 2nd June 2014

Presentation Outline:
 Introduction
 Improvement of boost converter circuit
configuration
 Development Of High Performance
Boost Converter
 Results And Discussion
 Conclusion
 References

 Power Conditioner is an important part in renewable
energy based power generation [1-3].
 A typical power conditioner which is consist of some
DC-DC converters and DC-AC inverter for distributed
generation such as photovoltaic (PV) systems[4].
 A boost converter is a DC to DC power converter
with output voltage always greater than the input
voltage
 The conventional boost converter is designed
without snubber is operated in hard switching.
 The circuit of boost converter is simple and provide
low gain (Vo/Vin).
Introduction

Introduction
d
V
V
Gi
in
o



1
1
S
on
T
t
d 

Introduction
Power semiconductor device
under hard-switching

Introduction
Power semiconductor device
under soft-switching

To address improvement of High gain &
Boost converter efficiency
Conventional boost converter
•hard switching make switching losses
(inefficient)
•to obtain high step up need high duty
cycle an extreme duty cycle cause a
long short circuit current cycle then loss
energy will be higher
Introduction

Objective:
To design and develop a new boost converter
for reducing the switching losses and enhance
the converter voltage gain. The high voltage
gain aims to meet the needs of a high dc
voltage as an input to the three phase inverter
in distributed generation.
Introduction

Improvement of boost converter circuit
 Bodur and Bakan, 2002; The switching devices in
the boost converter are turned on and off under exact
or near zero voltage switching (ZVS) and/or zero
current switching (ZCS) by using active snubber cell.
 Santos et al., 2006; The boost converter with
passive snubber cell is applied to maximum power
point tracking for PV systems. There are many
component to develop the snubber cell and voltage
gain is not higher than conventional boost.
 High step up and soft switching boost converter.

 Zhao & Lee, 2003; To increase step up the boost
converter, the inductor is replaced by a coupled
inductor. The function of the coupled inductor is like a
transformer. To reduce switching loosed its added a
capacitor snubber.
 Wai & Duan, 2005; To improve voltage gain, the
diode between primary side and secondary side of the
coupled inductor is replaced by high voltage capacitor.
To reduce the resonance effect of coupled inductor,
the clamp diode is added in the snubber cell. However,
the improving of voltage gain just depend on voltage
of the snubber capacitor. There is resonance effect in
the parasitic capacitance of the clamp diode.

Conventional Boost
Wu et al. 2005
Zhao & Lee 2003
D
V
V
G
in
o



1
1
Wai & Duan 2005; Wai et al. 2008
2
)
1
(
)
1
(
1
K
N
D
D
V
V
G
in
o 




D
N
K
D
D
NK
V
V
G
in
o








1
)
1
)(
1
(
1
2
D
ND
V
V
G
in
o




1
1

Development Of High Performance Boost
Converter
Designed
New Boost Converter
Mathematical
Analysis
Simulation of boost converter
Prototype
Hardware
Implement

Cin
L2
L1
D1
DO
D3
C1
Co
Ro
DZ1
Vin
Iin
Vinverter
= Vo
+
-
C3
LS
PWM
DZ2
D2
D5 D6
Cs
C2
D4
PWM
Z1
Z2
+
-
Io
VPV =
2
)
1
(
1
1
1
D
D
Dnk
nk
V
V
G
in
o







Vin= input voltage
Vo = output voltage
G = voltage gain
n = turn ratio of coupled inductor
k = coupling coefficient of coupled inductor
D = duty cycle of gate triggering
Development Of High Performance
Boost Converter

Development Of High Performance
Boost Converter

Hypothesis of Proposed Boost Perfomance
Comparison of boost converter voltage gain for k=1 and n=1.

Proposed Boost Converter
2
)
1
(
1
1
1
D
D
Dnk
nk
V
V
G
in
o







Vin = input voltage
Vo = output voltage
G = voltage gain
n = turn ratio of coupled
inductor
k = coupling coefficient of
coupled inductor
D = duty cycle of gate triggering

Implementation on Proto-board

Hardware prototype of the MPPT controller

Results
Voltage Gain Performance of the Boost Converter (Simulation vs
Experiment)
Input and Output Voltages of the
Proposed and Conventional Boost
Converters from Simulation
Input and Output Voltages of the
Proposed Boost Converter from
Experiment

Proposed and conventional boost converter efficiencies
Results

Comparison of Output voltages of boost
converters

Effect of duty cycle

comparison of the experimental output voltages of the
various proposed and conventional boost converters
Boost Converter Topology
Conventional Proposed
Input
voltage
(V)
Duty
cycle
Input
current
(A)
Output
current (A)
Output
Voltage
(V)
Input
current
(A)
Output
current
(A)
Output
Voltage
(V)
30
0.2 0.4 0.21 40 2.58 0.54 116
0.3 0.51 0.25 45 3.73 0.67 140
0.4 0.69 0.3 53 6.72 0.85 200
50
0.2 0.73 0.42 67 4.56 0.9 218
0.3 0.9 0.47 74 6.81 1.15 261
0.4 1.17 0.53 86 11.02 1.5 327
100
0.2 1.2 0.69 136 8.65 1.86 415
0.3 1.45 0.74 155 13.03 2.3 510
0.4 1.87 0.83 182 21.24 2.96 646
200
0.2 2.14 1.27 273 18.3 4.13 798
0.3 2.73 1.43 310 23.61 4.39 936
0.4 3.71 1.68 361 30.16 4.82 1072

Proposed and conventional boost converter output voltages

Conclusions
 An improved high performance boost converter
has been designed and developed by using a
coupled inductor and an active snubber circuit.
 The improved boost converter is proven to give
higher voltage gain and more efficient in terms of
energy conversion

References
[1] A. Zahedi, "Solar photovoltaic (PV) energy; latest developments in the building integrated and hybrid PV systems,"
Renewable Energy, vol. 31, pp. 711–718, 26 September 2005 2006.
[2] E. Koutroulis and K. Kalaitzakis, "Design of a maximum power tracking system for wind-energy-conversion
applications," IEEE Transactions on Industrial Electronics, vol. 53, pp. 486 - 494, 2006.
[3] S.-K. Kim, et al., "Dynamic Modeling and Control of a Grid-Connected Hybrid Generation System With Versatile
Power Transfer," IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, vol. 55, pp. 1677-1688, 2008.
[4] T. Ryu, "Development of Power Conditioner Using Digital Controls for Generating Solar Power," Oki Technical
Review, vol. 76, pp. 40-43, 2009.
[5] F. Kininger, Photovoltaic Systems Technology, 1st ed. Wilhelmshöher Alle 73, 34121 Kassel, Germany: Universität
Kassel, 2003.
[6] R.-J. Wai and W.-H. Wang, "Grid-connected photovoltaic generation system," IEEE Transaction on Circuits and
Systems, vol. 55, p. 953, April 2008.
[7] S. Mekhilef, "Performance of grid connected inverter with maximum power point tracker and power factor control,"
Int. J. Power Electronics, vol. 1, pp. 49-62, 2008.
[8] N. Mohan, et al., Power Electronics: Converters, Application and Design, 3rd ed. Hoboken, New Jersey, USA: John
Wiley & Sons, 2003.
[9] M. K. Kazimierczuk, Pulse-width Modulated DC–DC Power Converters, 1st ed. Singapore: John Wiley and Sons,
Ltd., 2008.
[10] C. M. C. Duarte and I. Barbi, "An improved family of ZVS-PWM active-clamping DC-to-DC converters " IEEE
Transactions on Power Electronics, vol. 17, pp. 1-7, 2002.
[11] K. H. Edelmoser and F. A. Himmelstoss, "DC-to-DC Solar Converter with Controlled Active Clamping System," in
12th Power Electronics and Motion Control Conference, 2006., 2006, pp. 124-127.
[12] K. Himchi, et al., "Circuit configuration of bidirectional DC/DC converter specific for small scale load leveling system
" in Proceedings of the Power Conversion Conference, 2002, 2002, pp. 603 - 609.
[13] Q. Zhao and F. C. Lee, "High-efficiency, high step-up DC–DC converters," IEEE Transactions on Power Electronics,
vol. 18, pp. 65-73, 2003.
[14] I. Laird, et al., "High-gain switched-coupled-inductor boost converter," in International Conference on Power
Electronics and Drive Systems-2009, Taipei, Taiwan, 2009, pp. 423-428.
[15] Y. Berkovich and B. Axelrod, "Switched-coupled inductor cell for DC-DC converters with very large conversion ratio,"

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