A mini-grid, micro-grid, and nano-grid are small-scale power grids that can operate independently or connect to larger grids. A mini-grid supplies electricity to a localized group, a micro-grid can be as small as a single building, and a nano-grid is typically under 100 kW and serves a single load. They use solar energy and storage to provide power in rural areas without access to main grids. These distributed energy systems improve reliability, lower costs, and have environmental benefits over traditional centralized grids.

1. Solar Mini-grid, Micro-grid and Nano-grid

2. Presented By:
Md. Jannatul Nayim Giyem
Id: 163-33-3647
Md. Asrafur Rahman
Id: 172-33-4002
Md. Arafat Sarker
Id: 172-33-4124
Tilottoma Datta
Id: 172-33-4196
Arifur Rahman
Id: 172-33-4126
Spring’2019
Section A L2_T3
Department of EEE
Daffodil International University
Presented To:
Abu Shahir Md. Khalid Hasan
Lecturer
Department of EEE
Daffodil International University

4. What is Grid??
The electrical grid is the electrical power system network
comprised of the generating plant, the transmission lines, the
substation, transformer, the distribution lines and the
consumer.

5. Mini-grid
A mini grid, also sometimes referred to as a "micro grid
or isolated grid", can be defined as a set of electricity
generators and possibly energy storage systems
interconnected to a distribution network that supplies
electricity to a localized group of customers

6. Micro-grid
A microgrid is a small-scale power grid that can operate
independently or collaboratively with other small power
grids. The practice of using microgrids is known as
distributed, dispersed, decentralized, district or embedded
energy production.

7. Nano-grid
Micro-grids are distributed generation systems connected
to end-users that are stand alone or connected to an
electrical network. Solar nano-grids are based on micro-
grids but are smaller in size.

8. What is solar mini grid?
A mini-grid is a small scale electricity network fed by solar
energy. A solar mini-grid boosts business activities in rural
areas, but can only be realised economically if the distance
between clients is relatively small.

15. What is Nano-Grid:
Nano-grids are small micro
grids, typically serving a single
building or a single load.
Navigant Research has
developed its own definition of a
nano-grid as being 100 kW for
grid-tied systems and 5 kW for
remote system. In many ways,
nano-grids appear to be an even
more radical rewiring and
rethinking of the world’s energy
future than microgrids.

16. How dose a Nano-grid work?
Loads:
Loads in a nanogrid can be any electrical
device of any size, though generally they will
be under 100 W.
Controller:
In a full nanogrid, devices are always entitled
to a minimum amount of power, to enable
basic communication functions, and with
this, can request more power from the
controller.
Storage:
Storage can be included internal to a
Nanogrid, or in a second attached nanogrid
that may only contain storage.
Gateway:
Gateways can be one-way or two-way, and
have a capacity limit. Each gateway has two
components: communication, and power
exchange.

17. Example:
 Universal Serial Bus (USB)
 Power over Ethernet (PoE)
 Vehicles
 Green Plug
 Microgrids

18. Benefits & environmental effect
Mini Grid
 Cheaper
 not connected to a main grid
 Independent
 no emission of harmful substances
 590 million people in Africa currently live without access to
electricity.
 little maintenance
Micro grid
 Electric reliability
 Enhances resilience/recovery
 Lower energy costs for consumers and businesses
 Improves the environment and promotes clean energy
 Strengthens the central grid
 Brings economic value to society

19. NenoGrid
 Scalable at all levels (DC, High Voltage)
 Starting load could be small to reduce the cost of installation
 Unlike AC grid, Scaling up the generation is simple (just adding in
parallel). No synchronization required
 Any standard load can be used
 No maintenance is necessary by the end customer.
 Pre-paid meter makes collection significantly easy
 Supports irrigation pumps for farming.
Economically impacts & users
 A bit more costly than regular supplier
 Regular Maintenance costly
 Not much user friendly (professional only)

20. Thanks for Your Concern