Project power point presentation a7batch new 1.ppt
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Department of Electrical & Electronics Engineering
S V COLLEGE OF ENGINEERING
(Autonomous)
Karakambadi Road, Opp. LIC Training Center
Tirupati-517507
Under The Guidance of
Dr.R.Sireesha,
Associate Professor.
PRESENTED BY
ALABANDA SREENIVASULU 22BF5A0203
CIGAMALA PRAVALLIKA 21BF1A0216
PASUPULETI VATHSALYA 21BF1A0251
KAMATAM BHAVANA REDDY 21BF1A0232
Analysis and Designing of fixed-frequency control phase-
shift full bridge (PSFB) resonant power converter for solar
applications
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ABSTRACT
ABSTRACT
Phase-shift full bridge (PSFB) converter structured with full-
bridge inverter, resonant tank network, high-frequency
transformer, and full-bridge diode rectifier. PSFB uses soft-
switching techniques at high-frequencies, increases the
efficiency and power density capability. Fixed-frequency control
gives the accurate filter design and works at low-load
conditions. A 2KW resonant converter is analysed, designed
and verified using simulations in this work. Also closed loop
control is developed for changes in the input and load
conditions
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INTRODUCTION
INTRODUCTION
PSFB is a unidirectional resonant converter.
PSFB converter is a DC-DC power converter that uses a phase shift to achieve
fixed frequency operation.
Phase shift is the process of shifting the timing of one half bridge relative to
other.
Fixed frequency control gives the accurate filter design and works at low-load
conditions.
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LITERATURE REVIEW
LITERATURE REVIEW
The design and control of resonant power converters, especially in the context of DC-
DC conversion for renewable energy applications like solar, have been extensively
studied.
Tahim et al. (2012) focus on nonlinear control techniques for bidirectional DC-DC
converters in stand-alone DC microgrids, which is relevant for efficient energy
management in solar-powered systems.
Finally, Erickson and Maksimovic (2001) provide a comprehensive understanding of
switch realizations and converter topologies in their book "Fundamentals of Power
Electronics," helping to establish the theoretical background for PSFB converters. These
works collectively contribute to the design of efficient, reliable, and cost-effective
resonant converters for solar applications.
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EXISTING SYSTEM
EXISTING SYSTEM
The variable frequency PSFB method allows for more precise control of the output
voltage and current under varying load conditions.
The switching frequency is dynamic, meaning it changes based on the load or
operating conditions.
If load conditions vary, and changing the frequency that effects the filters which are
designed with fixed frequency leads to reduce in efficiency.
Drawbacks :-
Filters are not effective due to variable frequency operation.
Difficulty in achieving optimal phase shift.
Inaccurate output voltage regulation,affecting load performance.
Increased switching losses.
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PROPOSED SYSTEM
PROPOSED SYSTEM
The proposed methodology of a fixed frequency PSFB converter simplifies the
design by maintaining a constant switching frequency, regardless of load or
input variations.
In this approach, phase-shift modulation is used to control the power transfer
between the primary and secondary sides of the converter.
The proposed fixed frequency PSFB converter employs a fixed frequency
control strategy to regulate output voltage.
Fixed frequency operation simplifies the control design because the switching
frequency does not change, reducing the complexity of the controller
compared to a variable frequency system.
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CONCLUSIONS
CONCLUSIONS
Fixed frequency control offers a reliable and
efficient solution for PSFB converters in
solar applications. By carefully selecting the
control technique and design parameters,
you can achieve high performance, stability,
and efficiency in your solar power system.
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R
REFERENCES
EFERENCES
A. P. N. Tahim, D. J. Pagano and E. Ponce, "Nonlinear control of dcdc
bidirectional converters in stand-alone dc Microgrids," 2012 IEEE 51st IEEE
Conference on Decision and Control (CDC), Maui, HI, USA, 2012, pp. 3068-
3073, doi: 10.1109/CDC.2012.6426298.
H. Xuezhi and N. Guangqun, "The Research of Modeling and Simulation for
Phase-shifted Full-bridge ZVS DC / DC Converter," 2009 Third International
Symposium on Intelligent Information Technology Application, Nanchang,
China, 2009, pp. 549-552, doi: 10.1109/IITA.2009.185.
R. D. Middlebrook and S. Cuk, "A general unified approach to modelling
switching-converter power stages," 1976 IEEE Power Electronics Specialists
Conference, Cleveland, OH, USA, 1976, pp.18-34, doi:
10.1109/PESC.1976.7072895.
R. W. Erickson and D. Maksimovic, "Switch realization" in Fundamentals of
Power Electronics, New York, NY, USA:Springer,pp. 80-81, 2001.
