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Student Number 963310604
Author Lameck Kabambalika(¬x¹p°Ò)
Author's Email Address No Public.
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Department International Master Program for Environment Sustainable Development
Year 2008
Semester 2
Degree Master
Type of Document Master's Thesis
Language English
Title SIMULATION AND PERFORMANCE EVALUATION OF BATTERY BASED STAND-ALONE PHOTOVOLTAIC SYSTEMS OF MALAWI
Date of Defense 2009-06-19
Page Count 88
Keyword
  • Battery-based stand-alone PV systems
  • BSPVS Performance
  • TRNSYS
  • Abstract The promotion of photovoltaic (PV) systems in Malawi yielded an increased number of institutionally and privately owned installed PV systems during 2002-2008. The national standards for battery-based standalone PV systems (BSPVS) were written in 2004 in order to ensure high standard and thus reliable systems. However, there had been information gap on technical performance of the installed system. To narrow the gap, a study was made with an aim of analyzing performance of PV systems in Malawi. As such, the BSPVS of Malawi were simulated using a TRNSYS simulation model which was validated by data measured from actual operating PV system in Taiwan. This study reports on performance results of the simulated systems located at Chitedze and Mzuzu in Malawi. The results showed that if the system is designed in accordance to procedures stipulated in Malawi standards then it is capable of operating annually with mean performance ratio of 0.68, PV array production factor of 0.88 and system efficiency of 78%. Regarding reliability, it was found that difference of radiation within locations in Malawi has an impact on system¡¦s reliability. For the two simulated locations, loss of load probability of systems in Mzuzu city was 0.13 and for Chitedze was 0.09. It is further found that during daytime, if the battery charging is given priority then overall system¡¦s reliability is improved by 40%. If the system is under-designed, it was found that its performance ratio is reduced considerably, it is less reliable and its battery remains in low state of charge for long periods.
    Table of Content Chinese abstracti
    English abstractii
    Acknowledgementsiii
    Table of contentsiv
    List of Tables and Figuresvi
    Nomenclatureviii
    Chapter 1 Introduction1
    1.1 Background of Photovoltaics2
    1.2 Organization of thesis5
    Chapter 2 Review of battery-based standalone PV systems6
    2.1 Rural electrification using BSPVS6
    2.1.1 Lessons learnt6
    2.1.2 Future prospects8
    2.2 Technical Performance8
    2.3 Efforts for performance improvements11
    2.3.1 Battery management12
    2.3.2 Charge control algorithms13
    2.4 BSPVS in Malawi14
    Chapter 3 Rationale of study16
    3.1 Problem Statement16
    3.2 Justification of the study16
    3.3 Goal and Scope of the Study18
    Chapter 4 Theory and calculation20
    4.1 Sizing of Battery based stand alone photovoltaic systems20
    4.2 Performance analysis of BSPVS23
    4.2.1 Derivation of PR, PF, and £bsys23
    4.2.2 Loss of load probability26
    4.3 Simulation of BSPVS27
    Chapter 5 Methodology30
    5.1 Experimental methods30
    5.2 Simulation Methods35
    5.2.1 Weather data reader component37
    5.2.2 PV array component39
    5.2.3 Battery Component41
    5.2.4 Regulator/Inverter43
    5.3 Data Analysis43
    Chapter 6 Results and discussion45
    6.1 Experimental results and discussion45
    6.1.1 Results45
    6.1.2 Discussion51
    6.2 Simulation results and discussion52
    6.2.1 Validation of simulation model52
    6.2.2 Simulation results55
    6.2.3 Discussion62
    Chapter 7 Conclusions and recommendations65
    7.1 Conclusions65
    7.2 Summary of contributions66
    7.3 Recommendations66
    7.4 Future Research67
    References68
    Appendix72
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    Advisor
  • Jiunn-Chi Wu(§d«TçÕ)
  • Files
  • 963310604.pdf
  • approve immediately
    Date of Submission 2009-06-26

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