![Set Eload
Get Esun matrix
Area of PV = [ 80% 90% 100% 110% 120% ]*PV
Battery size = [ 60% 70% 80% 90% 100%]*B
if EPV < Eload
Sizing PV system using traditional approach
charging discharging
eEnergy deficit
Energy demand
EPV + E batteries < Eload
Yes No
No
Economical study for chosen size
Yes](https://image.slidesharecdn.com/standalonephotovoltaicsystemsizingbasedondifferentapproaches-160927160531/85/Standalone-photovoltaic-system-sizing-based-on-different-approaches-8-320.jpg)
Standalone photovoltaic system sizing based on different approaches
- 1. STANDALONE PHOTOVOLTAIC SYSTEM SIZING BASED ON DIFFERENT APPROACHES AN-NAJAH NATIONAL UNIVERSITY FACULTY OF ENGINEERING AND INFORMATION TECHNOLOGY ELECTRICAL ENGINEERING DEPARTMENT Obada Abu-Eideh Motaz Hanbali Aref Masri Supervised by: Dr. Moien Omar
- 2. Outline • Problem statement • Earlier work • Introduction • Standalone PV system • Loss of Load Probability approach • Performance study • Economical Study • Software Simulation • Results • Conclusion
- 3. Problem Statement • Initial cost of PV systems is high. • Most expensive components are PV Array and Battery Block. • That’s why it’s important to determine the accurate size of the system which achieve the load needs. • Sizing PV system can be done by different approaches, here we focus on Traditional & LLP approaches.
- 4. Earlier Work Graduation Project 1: • Renewable Energy and its potential in Palestine. • Standalone PV system and its components. • PV system sizing approaches. • Sizing PV system using Traditional Approach. • Software Simulation. • Performance Study. • Economical Study.
- 5. Introduction • Using Traditional Approach may conclude in oversized or undersized PV system. • It does not take into account solar radiation, temperature and other important factors. • This will affect the initial cost and performance of the system. • LLP gives more accurate size of the PV system.
- 6. System components Standalone PV system components Standalone PV system is a system that generates power needed by the load connected to it using only PV cells.
- 7. Loss of Load Probability • LLP approach takes into account solar radiation of location. Epv = Apv * G * ηpv * ηc • It depends on setting different sizes of PV array and Batteries determined by Traditional Approach, and finding the best size technically and economically. • It aims to reduce lost energy as least as possible. energy difference = 1 366 (Epv − Eload)
- 8. Set Eload Get Esun matrix Area of PV = [ 80% 90% 100% 110% 120% ]*PV Battery size = [ 60% 70% 80% 90% 100%]*B if EPV < Eload Sizing PV system using traditional approach charging discharging eEnergy deficit Energy demand EPV + E batteries < Eload Yes No No Economical study for chosen size Yes
- 9. System Sizing Traditional Approach LLP Approach PV Size 24592 W 22132 W Battery Block Size 1137 Ah 1023 Ah PV Energy (yearly) 40493 KWh 36403 KWh Lost Energy (yearly) 5282 KWh 1338 KWh Loss of Load Probability 15.1% 3.8% LLP approach concluded 90% PV & 90% Battery
- 10. Performance Study • Traditional Approach has more energy excess comparing to LLP. • Both approaches suffer from deficit energy during some days among the year, especially in December, that needs to covered.
- 11. Performance Study • Diesel generators have a relatively low initial cost compared to their running cost. It will be needed for short interval, so it provides a good solution. • The highest deficit energy among the year is: -Traditional Approach : 55 KWh/daily -LLP Approach : 59 KWh/daily • So, an estimated diesel generator rated at 5 KW would solve the problem.
- 12. Economical Study Component Quantity Unit Price (NIS) Total Price (NIS) PV-Module 24592 Wp 18 442,656 Battery Cells 110 1534 168,740 Total Cost 611396 initial cost using Traditional approach
- 13. Economical Study Component Quantity Unit Price (NIS) Total Price (NIS) PV-Module 22133 Wp 18 398,390 Battery Cells 99 1534 151,866 Total Cost 550256 initial cost using Loss of Load Probability approach
- 14. Economical Study • The previous two tables show the initial cost of the two approaches. • It’s shown that the Traditional Approach gives an oversized PV system. • LLP Approach gives more accurate PV system size. • LLP approach saves up to 61,000 NIS of initial cost.
- 15. Software Simulation • We used PVsyst software to make a simulation for the system. • It helped in studying the performance of the system.
- 16. Software Simulation Available solar energy
- 17. Software Simulation • Daily output energy generated by PV array
- 18. Software Simulation • State of charge among the year
- 19. Software Simulation • Energy losses
- 20. Results Traditional Approach LLP Approach PV Array more less Battery Block more less Generated energy more less Energy losses more less cost more less Back-up Generator recommended recommended
- 21. Conclusion • Traditional Approach gives an oversized PV system, while LLP is more accurate. • Using LLP reduces the initial cost, energy losses. • Both approaches suffer from energy deficit during some days in winter. • Back-up diesel generator is needed in both generators to solve the energy deficit problem.