Micro gridSelf sustainable power

Small scale power supply network

Consist of distributed energy resource(DER)

Low voltage distribution

Micro grid structure

DEMAND SIDE MANAGEMENT

Parts of micro gridDistributed energy resource(DER)

Load

Storage system

Controller

point of Common coupling

Load &Point of common coupling

Critical load: uninterrupted power supply

Non-critical load(controllable):load can be

disconnected or shed accordingly.

Point of common coupling: point in the electric circuit

where a micro grid is connected to a main grid

Point of common coupling

Micro grid operation modeGrid connected mode

Connected through point of common coupling

Bi-directional power flow

Economic benefit by supplying excess power to main grid

Reduce the fuel cost using the power from main grid during

low(night) load

Island mode

Isolated from main grid

Combined Heat and Power (CHP)

Generation of power and heat sequentially from same

heat input

Maximum utilization of heat

Application:Fuel cell, sugar mill.

geothermalbiogasbiomass

Combine heat and power (CHP)

Features of CHPProtection against rising fuel prices

More efficient than separate generation of electricity

and heat.

Lower operating cost- higher efficiency translates to

reduced fuel consumption.

Very efficient technology.

Need of micro gridEconomical aspect

Transmission loss

Running cost

Environmental aspect

Large land space

Emission due to conventional generator

Climate change

Micro grid featuresBetter power quality

High reliability

Utilize more renewable energy sources

Less emission (Environmental friendly)

Low installation cost

Less land space

Micro grid advantageAbility to separate from main grid during disturbance

Reduce the emission

Reduce electricity cost

Micro grid challengesMaintenance and space required for battery bank

Synchronization with main grid

Uncertainty of wind and PV system

Protection of micro grid

References Review of Microgrid Technology by Hartono BS,

Budiyanto and Rudy Setiabudy Faculty of

Engineering. Universitas Indonesia Depok 16424.

Microgrid Economic Optimal Operation of the

Combined Heat and Power System with Renewable

Energy by W. Gu, Member, IEEE, Z. Wu, and X.

Yuan.