The document discusses different types of grid-connected solar PV electricity systems. It describes large scale PV plants that consist of solar panels, inverters, racks and other components that generate electricity fed into the grid. Grid connected projects can be ground mounted or rooftop PV. Ground mounted projects discussed include a 750 MW project in India. Rooftop PV is popular for meeting electricity loads and injecting surplus to the grid for buildings like schools and hospitals. Off-grid stand-alone solar systems are also described, including components like batteries, charge controllers and inverters. Grid-tied systems are explained as the most common, where solar power supplies homes and excess feeds back to the utility grid.

1. Presented By
Darshan Prajapati- 16meee20
Grid-Connected Solar PV Electricity

2. Grid Connected PV
• Large scale PV plants are used for electricity generation
that is fed into the grid. Such systems typically consist
of one or more photovoltaic (PV) panels, a DC/AC
power converter/inverter, racks, mounting fixtures, and
electrical interconnections.
• Additionally, such systems could also include
maximum power point trackers (MPPT), battery
systems and chargers, solar trackers, software for
energy management, solar concentrators etc.
• The electricity generated is either stored, used directly
for self-consumption, or is fed into large electricity
grids.

3. Grid connected projects may be
i) Ground Mounted PV
ii) Rooftop PV

4. i) Ground Mounted PV
• Implementation of 750 MW PV projects under
Phase II, Batch- I of JNNSM
• The selected projects was commissioned by
April, 2015.
• Solar Parks & Ultra Mega Solar Power
Projects:
• Mega solar 5MW plant in Jodhpur, Rajasthan
• http://seci.gov.in/content/innerpage/grid-connected-pv.php

5. ii) Rooftop PV
• Roof-top solar PV installations are becoming a
popular green energy option for not only
meeting own electricity load but also injecting
surplus generation into the grid.
• Schools, hospitals, storehouses, bus stations,
railway stations etc.
• provide ample spaces to set up PV projects.
There is a high possibility of natural load-
generation balance if roof-top PV solar
systems are installed.

6. How many solar panels do you see here
Solar Energy Development Specialists 41
2
1
Solar dom
water he
syste
Solar electric generating system
Direct gain
passive solar
space heating
windows

7. Solar PV Stand-alone Off-grid DC System
• Components:
 Solar array generates
electricity
 Charge controller shuts
down the array when the battery
is full
 DC disconnect is a safety
switch that is used if you need
to work on the system
 Battery bank stores
electricity from day to night, and
sunny to cloudy weather
 DC breaker panel is used to
attach the DC wiring circuits in
your house
95+%
80-85%
100%min. 97%
min. 97%
12-17%

8. Solar PV Stand-alone Off-grid AC System
Solar Energy Development Specialists 45Additional Components:
Inverter changes DC
electricity from the solar array
and the battery bank to AC
electricity for your house
AC breaker panel is used to
attach the AC wiring circuits
in your house
95+
%
80-
85%
100
%
min.
97%
85-
94%
min.
97%
12-
17%
Overall system efficiency:
- array to loads: 59% to 74%
- sun to loads: 7% to 12%

9. Grid-Connected System – Grid-dependent
4 major components:
– PV array
– DC disconnect
– Solar inverter
– AC disconnect
• Most common grid-
connected
configuration
Solar PV

10. PV Array
DC
Wire Service Provider's
electricity distribution lines
AC
All electrical circuits in a house or building
Import
meter
Export
meter
1
2
3
4
Inverter
How can
you
generate
electricity
into your
house and
also
back into
the grid?
This is by far the
most common
configuration for a
grid-connected solar
power system.
There is no battery
bank.
kWh
kWh

11. AC
1 3
4
but it is not common.
Main breaker panel
Essential Circuits
AC
5
Battery Bank
DC
6
7
Export
meter kWh
Inverter/charger
DC
Wires Service Provider's
electricity distribution lines
2
How
about energy
security?
This configuration
has a battery bank
kWh
Import
meter
PV Array
Charge
Controller

12. What happens during a power outage?
The inverter senses that there is a power outage and turns itself off.
When power returns it turns itself on automatically.

13. Grid-Connected System – Grid-
interactive

15. • Grid Tie System is the simplest and most cost
effective way to connect PV modules to regular
utility power.
• Grid-Connected systems can supply solar power
to your home and use utility power as a backup.
• As long as there is enough electricity flowing in
from your PV system, no electricity will flow in
from the utility company.
• If your system is generating more power than you
are using, the excess will flow back into the grid,
turning your meter backwards.
Conclusion