Se ha denunciado esta presentación.
Se está descargando tu SlideShare. ×

L5-PV system architecture.pdf

Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Cargando en…3
×

Eche un vistazo a continuación

1 de 47 Anuncio
Anuncio

Más Contenido Relacionado

Más reciente (20)

Anuncio

L5-PV system architecture.pdf

  1. 1. Energy Conversion 1 Lecture 5 – PV System Architecture
  2. 2. Content 1. PV system architecture 2. Charge controller 3. Inverter 4. Battery 2
  3. 3. Content 1. PV system architecture 2. Charge controller 3. Inverter 4. Battery 3
  4. 4. PV System Architecture Stand alone system Hybrid system Grid connected system 4
  5. 5. Stand alone system – direct connection  Very simple architecture  Limited to only DC load  PV not operated at MPP 5
  6. 6. Stand alone system with battery 6
  7. 7. Why need battery? 7
  8. 8. Hybrid system 8
  9. 9. Hybrid system 9
  10. 10. Grid-connected PV system 10
  11. 11. Grid-connected system – 1 11
  12. 12. Grid-connected system – 2 12
  13. 13. Grid-connected system – 3 13
  14. 14. Typical layout of a utility-scale PV system 14
  15. 15. Grid-connected PV system using central inverter 15
  16. 16. Grid-connected PV system using central inverter 16
  17. 17. Grid-connected PV system using string inverter 17
  18. 18. Floating PV system 18
  19. 19. Content 1. PV system architecture 2. Charge controller 3. Inverter 4. Battery 19
  20. 20. Connection of charge controller 20
  21. 21. Functions of charge controller o Main role is to control charging and discharging of the battery o Over charge protection o Over discharge protection o Monthly equalization charge o Various controlling mode for load o Over temperature and overload protection o Short circuit protection of load and PV o Reverse current protection at night o Reverse connection protection of PV, load, and battery 21
  22. 22. PWM charge controller 22
  23. 23. MPPT charge controller 23
  24. 24. Maximum Power PointTracker 24
  25. 25. Types of charge controller 25
  26. 26. Example of a MPPT charge controller’s spec 26
  27. 27. Content 1. PV system architecture 2. Charge controller 3. Inverter 4. Battery 27
  28. 28. Solar PV inverter  Solar PV Inverters convert the DC output of photovoltaic (PV) solar panels or strings of panel into a AC current which is injected to the grid (or load).  Solar PV inverters have thefollowing functions: ◦ DC/AC conversion and voltage adaptation ◦ Maximum power point tracking ◦ Anti-islanding protection ◦ Synchronization with the grid ◦ Support to the grid where the PV system is connected 28
  29. 29. Inverter efficiency 29
  30. 30. Central inverter 30
  31. 31. Central inverter Advantages of a Central Inverter  The most traditional inverter topology  Easy system design and implementation  Low cost perWatt  Easy accessibility for maintenance and troubleshooting Disadvantages of a Central Inverter  High DC wiring costs and power loss due toVoltage Drop.  Single MPPT for the entire PV system  System output can be drastically reduced in case of partial shading and string mismatch  Difficult to add strings or arrays for future expansion  Single failure point for the entire system  Monitoring at array level  Huge size! (It is a disadvantage because the bigger size requires more land and creates a shading issue for the PV array.) 31
  32. 32. String inverter 32
  33. 33. String inverter Advantages of a String Inverter  Smaller in size when compared to central inverters  Better MPPT capability per string  Scalability for future expansion by adding parallel strings  Short DC wires  Monitoring at string level Disadvantages of a String Inverter  The installation requires special racking for the inverter for each string  Poor flexibility at partial shading  Higher per Watt cost than central inverter 33
  34. 34. Micro Inverter 34
  35. 35. Micro Inverter Advantages of Micro Inverters  Resilience to partial shading effects as compared to the central and string inverters.  MPPT at module level  Highest system flexibility for future expansion  Minimum DC wiring costs  Monitoring at module level Disadvantages of Micro Inverters  High perWatt cost  High maintenance costs  Difficult access for maintenance since the installation is under the PV modules 35
  36. 36. Example datasheet 36
  37. 37. Example datasheet 37
  38. 38. Content 1. PV system architecture 2. Charge controller 3. Inverter 4. Battery 38
  39. 39. SOC and DOD 39
  40. 40. Battery life 40
  41. 41. DOD vs Battery temperature 41
  42. 42. Battery self discharge 42
  43. 43. Battery voltage 43
  44. 44. Bulk, absorption, and float charging control battery voltage with the charging current during a multiple-stage charging cycle. Battery charging
  45. 45. Rated capacity 45
  46. 46. Rated capacity 46
  47. 47. Connection in series/parallel 47

×