Aalborg Inverter—A New Type of “Buck in Buck, Boost in Boost” Grid-Tied Inverter ,2015 Power Electronics Projects Training
Contact: IIS TECHNOLOGIES
ph:9952077540,landline:044 42637391
mail:info@iistechnologies.in
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Aalborg Inverter—A New Type of “Buck in Buck, Boost in Boost” Grid-Tied Inverter
1. Aalborg Inverter—A New Type of “Buck in Buck, Boost in
Boost” Grid-Tied Inverter
Presented by
IIS TECHNOLOGIES
No: 40, C-Block,First Floor,HIET Campus,
North Parade Road,St.Thomas Mount,
Chennai, Tamil Nadu 600016.
Landline:044 4263 7391,mob:9952077540.
Email:info@iistechnologies.in,
Web:www.iistechnologies.in
www.iistechnologies.in
Ph: 9952077540
2. Abstract
• This project presents a new family of high efficiency dc/ac grid-tied inverter with a wide variation of input dc
voltage. It is a “boost in boost, buck in buck” inverter, meaning that only one power stage works at high
frequency in order to achieve minimum switching loss.
• The minimum voltage drop of the filtering inductor in the power loop is achieved to reduce the conduction
power loss in both “boost” and “buck” mode.
• The principle of operation is demonstrated through the analysis on the equivalent circuits of a “half-bridge”
single-phase inverter.
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Ph: 9952077540
4. Existing System
• In the renewable power generation system, the input dc voltage of the converter may vary
greatly.
• For example, the output dc voltage of a solar panel will change a lot under different temperature
conditions.
• To transfer this kind of dc energy into the grid, a two- or three-stage inverter may be required as
the power interface, especially for the VSI-based system. If all power stages work at high
frequency, the efficiency of the inverter will be inevitable affected.
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5. Proposed System
• In this project, typical full-bridge single-phase grid-tied inverters with the different power sources
are introduced.
• Next, a new type of “buck in buck, boost in boost” grid-tied inverter is proposed and the
operating principle is illustrated through a half-bridge inverter with the equivalent circuits in the
different working stages.
• Then, the modeling is carried out with a small signal model method. Based on this, an indirect
current control method is introduced, when the inverter is working in the “boost” stage.
• Finally, simulations and experiments are given to verify the theoretical analysis and the principle
of operation.
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Ph: 9952077540
6. TOOLS AND SOFTWARE USED
• MP LAB
• ORCAD/PSPICE
• MATLAB/SIMULINK
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