This document discusses a novel multiport converter for solar PV-battery systems powering standalone loads. The proposed converter uses a reduced stage power converter based on current fed dual active bridge (CF-DAB) topology, which offers galvanic isolation and a high voltage ratio without sacrificing efficiency. It connects a photovoltaic panel, battery, and load via a multiport DC/DC converter and DC/AC inverter to regulate the load voltage. This system aims to maximize energy harvesting from the solar panels and provide backup power from the battery for off-grid applications.

1. DUALACTIVE BRIDGE WITH REDUCED STAGE
MULTIPORT DC/AC CONVERTER FOR PV BATTERY
SYSTEMS

2. ABSTRACT
• Standalone power systems are significant for electrifying the remote
areas where extending the grid connectivity is not feasible, either
economically or logistically
• Solar Photovoltaic (PV) systems with battery backup are among the
most popular candidates to serve as an energy source in standalone
systems.
• This article presents a novel multiport converter (MPC) for PV-battery
systems powering standalone loads.
• The proposed converter is a reduced stage power converter based on
current fed dual active bridge (CF-DAB) topology. CF-DAB offers
galvanic isolation and a high voltage ratio without sacrificing

3. INTRODUCTION
• Standalone generation of power is an effective way to provide
electricity to remote places.
• Solar Photovoltaic based systems are suited for standalone systems
in remote areas.
• A General solar PV system with backup consists of solar panels as
the main energy source and batteries as a source of backup power.
• In a standalone system, the interface circuit aims to regulate the load
voltage and frequency to their nominal values.

4. • The solar panels are generally operated at their maximum power
point (MPP) and the deviation of generated power from load
demand is taken care of by the battery.
• A new multiport converter is proposed for the standalone power
generation.
• It is reduced stage power converter based on current fed dual active
bridge topology.
• The performance of the proposed converter based on the tracking
maximum power point, regulating the load voltage with lesser
switching losses.

5. LITERATURE SURVEY
S.NO AUTHOR NAME LITERATURE JOURNAL NAME
YEAR OF
PUBLISHED
1 S. Kurm and V. Agarwal
Current fed dual active bridge based
multiport DC/AC converter for standalone
solar PV fed systems with battery Backup
Proc. IEEE Int. Conf.
Power Electron., Drives
Energy Syst
2020
2
D. Venkatramanan and
V. John
A reconfigurable solar photovoltaic grid
tied inverter architecture for enhanced
energy access in backup power
applications
IEEE Trans. Ind.
Electron., vol. 67, no.
12, pp.
2020
3
D. Meneses, F.
Blaabjerg, Ó. García,
and J. A. Cobos
Review and comparison of step-up
transformer less topologies for
photovoltaic AC-module application
IEEE Trans. Power
Electron., vol. 28, no. 6,
pp. 2649–2663
2013
4
Y. P. Siwakoti and F.
Blaabjerg,
H-bridge transformer-less inverter with
common ground for single-phase solar-
photovoltaic system
Proc. IEEE Appl. Power
Electron.
2017
5 W. Jiang and B. Fahimi,
Multiport power electronic interface-
concept ,modeling, and design
IEEE Trans. Power
Electron., vol. 26, no.
7,pp.
2011

6. 6
H. Tao, J. L. Duarte, and
M. A. M. Hendrix
Multiport converters for
hybrid power sources
Proc. IEEE Annu. Power
Electron.
2008
7
H. Zhu, D. Zhang, B.
Zhang, and Z. Zhou
A noni solated three-port DC–DC converter
and three-domain control method for PV-
battery power systems
IEEE Trans. Ind.
Electron., vol. 62, no. 8,
pp. 4937–4947
2015
8
F. Kardan, R. Alizadeh,
and M. R. Banaei
A new three input DC/DC
converter for hybrid PV/FC/battery
applications
IEEE J. Emerg. Sel.
Topics Power Electron.,
vol. 5, no. 4, pp.
2017
9 S. Kurm and V. Agarwal
Hybrid energy storage system based on a
novel reduced rating multi input converter
IEEE Trans. Power
Electron.,
vol. 35, no. 11, pp.
12133–12142
2020
10
Z.Wang, S. Fan, Y. Zheng,
and M. Cheng
Design and analysis of a CHB converter
based PV-battery hybrid system for better
electromagnetic compatibility
IEEE Trans.Magn., vol.
48, no. 11, pp. 4530–
4533
2012

7. EXISTING SYSTEM
DC-DC
CONVERT
ER
DC-AC
CONVERTE
R
FILTER LOAD
DC-DC
CONVERT
ER
BATTERY
PHOTO
VOLTAIC
PANEL

8. PHOTOVOLTAIC PANEL
• Photovoltaics is the conversion of light into electricity
using semiconducting materials that exhibit the photovoltaic effect.
• PV installations may be ground-mounted, rooftop-mounted, wall-
mounted or floating. The mount may be fixed or use a solar tracker to
follow the sun across the sky.
BATTERY
• Battery is an storage element of excessive DC power generated at
photovoltaic panel and provide the power when there is need of power.
DC-DC CONVERTER
• DC-DC converters convert one DC voltage level to another, which may
be higher or lower, by storing the input energy temporarily and then
releasing that energy to the output at a different voltage.

9. • DC-to-DC converters which are designed to maximize the energy
harvest for photovoltaic system and for wind turbines are called power
optimizers.
DC-AC CONVERTER
• The electrical circuits that transform Direct current (DC) input
into Alternating current (AC) output are known as DC-to-AC
Converters or Inverters.
• They are used in power electronic applications where the power input
pure 12V, 24V, 48V DC voltage that requires power conversion for
an AC output with a certain frequency.
• These are used in numerous applications, including PV systems,
battery storage systems, traction drives, variable speed drives, etc.
FILTER

10. PROPOSED SYSTEM
STIFF
DC
LINK
DC/AC
CONVERT
ER
LOAD
PHOTO
VOLTAIC
PANEL
MULTI PORT
DC/DC
CONVERTE
R
BATTE
RY

11. PHOTOVOLTAIC PANEL
• Photovoltaics is the conversion of light into electricity
using semiconducting materials that exhibit the photovoltaic effect.
• PV installations may be ground-mounted, rooftop-mounted, wall-
mounted or floating. The mount may be fixed or use a solar tracker to
follow the sun across the sky.

12. MULTIPORT DC/DC CONVERTER
• DC-to-DC converters convert one DC voltage level to another, which
may be higher or lower, by storing the input energy temporarily and
then releasing that energy to the output at a different voltage.
• DC-to-DC converters which are designed to maximize the energy
harvest for photovoltaic system and for wind turbines are
called power optimizers.
• It has numerous number of ports.

13. STIFF DC LINK
• An stiff DC link is used to provide a more stable DC voltage, limiting
fluctuations as the inverter sporadically demands heavy current.
DC/AC CONVERTER
• The electrical circuits that transform Direct current (DC) input
into Alternating current (AC) output are known as DC-to-AC
Converters or Inverters.
• They are used in power electronic applications where the power input
pure 12V, 24V, 48V DC voltage that requires power conversion for
an AC output with a certain frequency.
• These are used in numerous applications, including PV systems,
battery storage systems, traction drives, variable speed drives, etc.

14. PROJECT MODULE