a seminar presentation on Energy Storage,

2. A Way To Smart Grid
Presented By:
Sakshi Rastogi
IIIrd EE

3.  Energy storage is
the conversion of
energy to other
forms so that it
may be used at a
later stage when
required.

4.  Renewable energy is often intermittent (like
wind and sun), and storage allows use at a
convenient time.
 For the reliability and the economy
purposes of electricity.
 We can store the energy in the off peak time
and use that in the peak load time.

7.  Flywheels are mechanical devices which
accelerate a rotor to a very high speed, storing
the energy as rotational energy.
 Main components are:
 Flywheel (Carbon composite)
 Magnetic bearing
 Power coupling (AC to DC & DC to AC convertor)
 Vaccum containment
 Shaft

9.  Main features are:
 High charging and discharging rates.
 Energy efficiency is around 90% at rated power.
 Long lifetime around 20 years.
 Applications:
 Integration with renewable energy power plants.
 Power conditioning.
 For providing power at the time of grid failure.

10.  A flow battery is a rechargeable battery, in which
the energy is stored by the means of reduction
and oxidation i.e; redox, so these are also called
Redox Flow Batteries.
 The principle of the RF battery system was
presented by L. H. Thaller of the NASA of the
United States in 1974.
 Main components :
 Cell
 positive and negative electrolyte tanks
 pumps and piping
 AC power system via an AC/DC converter

12.  Equations:
 Positive electrode
VO2+ + H2O ⇆ VO2+ + 2H+ + e-
 Negative electrode
V3+ + e− ⇆ V2+
 Applications:
 Load levelling
 Voltage sag compensation
 Emergency power supply

13. 500 kW System for Load Leveling
(Battery Cubicles)
Instantaneous Voltage Sag
Compensation 3 MW System

14.  SMES systems store energy in a magnetic field
created by the flow of Direct Current in a coil of
superconducting material.
 Main components:
 Super conducting coil
 Power conditioning system
 Cryogenically cooled refregirator

15.  Applications:
 Power quality control
 Particle detectors

16. SUPER CAPACITORS
 Supercapacitors are very high surface area
activated capacitors that use a molecule thin
layer of electrolyte as dielectric.
 Main components are:
 Electrodes
 Electrolyte
 Seperators
 Applications:
 UPS Applications
 Peak load supply

17.  The thermal energy storage (TES) can be
defined as the temporary storage of thermal
energy at high or low temperatures.
 Types of TES:
 Sensible Heat Storage
 Latent Heat Storage
 Applications:
 Integrals with geo thermal power plants
 Cold storage

18.  Reliable and affordable energy storage is a
prerequisite for using renewable energy.
 Energy storage therefore has a pivotal role
in the future.
 Energy storage is the most promising
technology currently available to meet the
ever increasing demand for energy.

19. REFERENCES
 https://en.wikipedia.org/wiki/List_of_energy_
storage_projects#cite_note-DOE-2-20
 http://www.iec.ch/whitepaper/pdf/iecWP-
energystorage-LR-en.pdf
 http://indiaesa.info/index.php/resources/indi
a-energy-storage-projects.html

20. ?