Large energy storage systems
Student name: Mr Divyajot Singh Jendu
Guide: Mr Sheeraz Kirmani
Year of completion: 2012
Host Organisation: Suzlon Power Infrastructure Ltd.
Supervisor (Host Organisation): Mr Atul Shah
Abstract: Energy Storage currently plays an important role in the electric utility industry. On the current electricity
grid, storage capacity has been developed to accumulate energy produced by large, less responsive
thermal generation plants and then redispatch it based on peak demand. Storage facilities were largely
financed by arbitrage (buying energy at lower price and selling it at a higher price). In addition to the
benefits derived by utility companies from arbitrage, energy storage currently contributes to reliability,
efficiency, power quality, transmission optimization, and black start functions.
Wind and Solar Energy are available when weather dictates, not on command. This means that
generation does not correspond to demand and in India, where there is an acute shortage of energy both
in peak and average demand and in spite of that wind turbines are forced to back down their generation
which are rather called as “must run†generation. Why? It has been noticed when frequency approaches
50 Hz. or > 50 Hz. the SLDC first ask Wind turbine to be back down instead of taking the conventional
energy plants to technical minimum. As an example of realization of renewable generation to the
maximum, wind power exported from Germany is utilized in France by ramping down even the nuclear
power generation.
The question is whether the above loss really demands energy storage and CAPEX. When there is an
acute shortage of energy and load shedding across the country why this zero fuel cost energy cannot be
used when we have a national grid.
Aim of this project study is to make the optimum use of Wind Energy Generation via storage technology
and improve the Grid stability either Large or micro scale.
In chapter 2, I have discussed different technologies of storing the energy with respect to their
applications, needs, site-specifications and different parameters like operating temperatures, life,
efficiencies etc. After words benefit of employing the storage in Indian Grid either it is micro scale or
large scale; it is expressed in chapter 3.
Methodology to identify the amount of energy that can be stored is done in chapter no. 5 for five
different sites in India. Results and conclusion follows it in chapter 6 and 7 respectively.
