pv systems - applications and...
TRANSCRIPT
Arno Smets, Nishant Narayan
PV Systems - Applications and DesignGrid-Connected PV Systems
Week 8.2
Grid connected system
Distributionpanel
Grid connectedinverter
PV array Balance of System Loads
Grid
AC load
Netmetering
Grid connected system
Distributionpanel
Grid connectedinverter
PV array Balance of System Loads
Grid
AC load
Grid connected system
20%PV 98%cables
1000 W/m2 200 W/m2 196 W/m2
95%inverter
186.2 W/m2
system PV cable inverter
186.2100 18.62%
1000system
Design example
Load demand
PV arraydesign
Chargecontroller
design
Batterydesign
Equivalentsun hours
Inverterdesign
FINAL DESIGN
Days of autonomy
AccountingLosses
1
2
3
4 5
Design example – 1 Load demand
Item Quantity Powerper item(WAC)
Total power(WAC)
Time of use (h)
Total energy(Wh)
Light 4 25 100 3 300
TV 1 100 100 2 200
Desktop 1 100 100 1 100
TOTAL 300 600
Design example – 2 Losses
Distributionpanel
Grid connectedinverter
PV array Loads
Grid
AC load
600Wh
98%cables 95%inverter
600Wh/(0.98x0.95)
644.5 Wh
Design example – 3 Insolation
Equivalent sun hours
~4.5 h/day
Design example – 4 PV array
Panel specifications(example)
Power output (Wp) 100
VMPP (V) 16
IMPP (A) 6.25
VOC (V) 20
ISC (A) 7
?
Design example – 4 PV array
MPPT
644.5143.2
4.5 /p
WhMinimumW W
h day
Total energy demand
Equivalent sun hours
143.21.4 2
100 p
WNumber of panels panels
W
Design example – 4 PV configuration
max 7 2 14Maximumcurrent I A A
Short circuit current
Open circuit voltage
Parallel
max 20 2 40Maximumvoltage V V V
Series
Design example – Grid connection
Design example – 5 Inverter
Minimum NominalPower Rating 2 100 200W W
Power from one panel
Number of panels
Inverter specifications(example)
Rated power (W) 300
Maximum DC voltage (V) 50
Maximum DC current (A) 8
MPPT Yes
< IMax
Panels in Series
> VMax
Thank you for your attention!