THE DESIGN OF A BOOST CONVERTER FOR A PV MPPT SYSTEM
8 views 1 purchase
Course
B sc Eng electrical (ENEL4EA)
Institution
University Of KwaZulu-Natal (UKZN)
This report entails the design of a boost converter for a PV array maximum power point tracking (MPPT) system. The system’s main objective is to always extract maximum power from photovoltaic cells. The system uses an incremental conductance MPPT algorithm to track the maximum power of a PV array...
THE DESIGN OF A BOOST CONVERTER FOR A PV
MPPT SYSTEM
,ABSTRACT
This report entails the design of a boost converter for a PV array maximum power point tracking
(MPPT) system. The system’s main objective is to always extract maximum power from
photovoltaic cells. The system uses an incremental conductance MPPT algorithm to track the
maximum power of a PV array. A theoretical and literature study that relates to this work was
conducted and included in the report. The project feasibility study, and the functional and non-
functional specifications are listed. To achieve these objectives, a methodology was included, it
comprised of parameter calculations and steps to be followed whenever conducting a design of this
magnitude. Since every project has time and financial constraints, it was important to also include
the budget and the timeline layout. The design was separated into three sections for proper analysis
and design namely, PV array, boost converter and the MPPT algorithm. The PV array was designed
to generate a voltage between 100 and 150 volts. The boost converter was designed to step up this
PV input voltage of 150 volts to an output voltage of 300 volts. Using the design specifications, the
boost converter parameters were calculated and applied to the simulation. The MPPT algorithm
used is the incremental conductance algorithm, this method was found to be best and cheaper to
implement. The incremental conductance algorithm tracks the MPP of the PV array by comparing
the incremental conductance and the negative of the instantaneous conductance, the duty cycle is
then adjusted accordingly.
i
,Table of Contents
Declaration........................................................................................... Error! Bookmark not defined.
Acknowledgements ............................................................................. Error! Bookmark not defined.
Abstract................................................................................................................................................... i
Table of figures..................................................................................................................................... iv
Nomenclature ........................................................................................................................................ v
1. Introduction ....................................................................................................................................... 1
2. Problem Description ......................................................................................................................... 2
2.1 Problem Statement ........................................................................................................................ 2
2.2 Aims and Objectives ..................................................................................................................... 2
3. Literature Review ............................................................................................................................. 2
4. Theoretical Background ................................................................................................................... 3
4.1 Photovoltaic (PV).......................................................................................................................... 3
4.2 Maximum Power Point Tracker (MPPT) ...................................................................................... 3
4.3. The Boost Converter .................................................................................................................... 5
4.3.1 Operation Principle of a boost Converter............................................................................... 5
4.3.2 Continuous Conduction Mode (CCM). .................................................................................. 5
4.3.3 Discontinuous Conduction Mode (DCM) .............................................................................. 6
5. Design Specifications ........................................................................................................................ 7
5.1 Functional Specifications .............................................................................................................. 7
5.2 Non-Functional Specifications...................................................................................................... 8
6. Proposed Solution and components identification. ........................................................................ 8
7. Design Methodology.......................................................................................................................... 8
7.1 PV Array ....................................................................................................................................... 8
7.2 Boost Converter .......................................................................................................................... 10
7.2.1 Calculation of parameters .................................................................................................... 10
7.2.2 Components selection .......................................................................................................... 11
7.2.3 Power Losses Calculations................................................................................................... 11
7.3 Maximum Power Point Tracker .................................................................................................. 13
7.3.1 Algorithm selection .............................................................................................................. 13
7.3.2 Components selection .......................................................................................................... 13
8. Circuit Design and Simulation ....................................................................................................... 14
9. Simulation Results and Discussion ................................................................................................ 15
9.1 Voltage, Current And Power ....................................................................................................... 15
9.2 Maximum Power Point Tracking ................................................................................................ 16
ii
, 9.2.1 Changing Both The Irradiance And Temperature ................................................................ 16
9.2.1 Changing The Temperature Only ........................................................................................ 18
9.2.1 Changing The Irradiance Only ............................................................................................ 19
10. Final Product and implementation .............................................................................................. 19
11. Feasibility Study ............................................................................................................................ 20
12. Project Management ..................................................................................................................... 21
12.1. Component costs ...................................................................................................................... 21
12.2 Labour Costs ............................................................................................................................. 21
12.3 Breakeven analysis.................................................................................................................... 22
13. Conclusion ..................................................................................................................................... 22
14. References ...................................................................................................................................... 23
Appendices ........................................................................................................................................... 24
Appendix A ....................................................................................................................................... 24
Gantt Chart:................................................................................................................................... 24
Appendix B ....................................................................................................................................... 25
Simulation Results showing longer simulation Time. ...................................................................... 25
Boost Converter Parameter Calculations ...................................................................................... 25
Power Losses Calculations............................................................................................................ 26
MOSFET losses ............................................................................................................................ 26
Diode power losses ....................................................................................................................... 26
Boost Converter Efficiency............................................................................................................... 26
Appendix C ....................................................................................................................................... 27
The MPPT algorithm code: ............................................................................................................... 27
The Turnitin Receipt ..................................................................... Error! Bookmark not defined.
iii
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mbongeleningcongo10. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.37. You're not tied to anything after your purchase.
