Solar PV & Diesel GENERATOT Hybrid System Design

1. Solar PV & Diesel GENERATOT Hybrid System Design By. Amjad Ali Kamboh

2. System Sizing

3. System Requirements:

4. System Calculations: Load: 2.5 KW Anatomy: 48 hrs (continued) Whr = watt (load) x hrs 25000 x 48 = 120,000 x 1.3 (losses) = 156,000 PV Panels Required: Panel Size: = 156,000/5.5 = 28363.6363 Watts = 28.36 KW or 29 KW System available with Client is 35 KW

5. PV Panels Required for 35 KW system System = 35000/ 230 = 152.17 or 153 Recommended 154 Panel Sun Tech PV Panel 230 Watt

6. Battery Calculations Battery Sizing : 0.85 for battery loss 0.8 for depth of discharge Battery Capacity (Ah) = Total Watt-hours per day used by appliances x Days of autonomy (0.85 x 0.8 x nominal battery voltage) = 60,000 x 2 32.64 = 3676.47 Ah No. of Batteries Required = 24 batteries (2 volt and 4000 Ah)

7. Solar Charge Controller: According to standard practice, the sizing of solar charge controller is to take the short circuit current (Isc) of the PV array, and multiply it by 1.1 for MPPT and 1.3 for PWM Charge controller = 8 x 8.25 x 1.1 = 72.6 Ampere Therefore 10 , 80A (T80 charge controller will be required for system to fulfill the 600 A) .

8. Inverter Sizing An inverter is used in the system where AC power output is needed. The input rating of the inverter should never be lower than the total watt of appliances. The inverter must have the same nominal voltage as your battery. For stand-alone systems, the inverter must be large enough to handle the total amount of Watts you will be using at one time. The inverter size should be 25-30% bigger than total Watts of appliances. In case of appliance type is motor or compressor then inverter size should be minimum 3 times the capacity of those appliances and must be added to the inverter capacity to handle surge current during starting. Client –Energy has 20 KW inverter which is more than requirements.

9. System Designing

10. Panel Specifications: Watt = 230 Isc = 8.25 A Voc = 36.8 • 8 panels in parallel = watts 1840, Isc 66 A and Voc 36.8 Vdc • 2 parallel string will be contented in series. = watts 3680, Isc 66, Voc 73.6 • (a+b) 9 string will be connected in parallel. = watts 33120, Isc 594, 73.6 • 5 panels in parallel = watts 1150, Isc 41.25 A, Voc 36.8 • 2 parallel string will be contented in series. = watts 2300, Isc 41.25 • Voc 73.6 Total Watts = (33120 + 2300) = 35420 or 35.42 KW Isc = ( 594 + 41.25 ) = 635 A Voc = = 73.6

11. Battery Selection: Battery Connections: SBS USA 2 volt , 4000 Ah Applications: ■ Utility (stations and substations) ■ Power Distribution ■ Switchgear ■ Telecom Equipment ■ Solar/Photovoltaic ■ UPS 24 batteries will be connected in series to obtain 48 volts and capacity will remains constant 4000 Ah which is Client requirement

12. Equipment Selection

13. PV Panel:

14. Inverter: Single Phase bidirectional dual mode hybrid inverter for mini grid system • Pure sine wave out put • Single phase configuration • High efficiency more than 94% • Automatic/manual generator control

15. Charge Controller

16. Battery

17. System layout

20. Thanks