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Pingili Akshay

on 29 November 2013

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Transcript of Akshay

Influence of storage systems on smart grid
Capital Costs ($kW-hr) Medium ($350–$500/kW-hr)
influence of storage systems on smart grid
Equipment that stores electrical energy in different forms for later use.
Electricity demand is rarely constant over time.
Renewable generation is intermittent.
Excess generation during low demand period can be stored.
Stored energy can be converted into electricity during high demand.
Makes the electricity grid flexible, reliable and efficient.
Influence of storage on smart grid
Influence of storage on smart grid
Current Battery options
Sodium Sulfur (NAS) battery
Advanced Batteries- The Smart Grid's Killer Application
Batteries(PEM fuel cell):A proton exchange membrane fuel cell transforms the chemical energy liberated during the electrochemical reaction of hydrogen and oxygen to electrical energy, as opposed to the direct combustion of hydrogen and oxygen gases to produce thermal energy.
Why and what is energy storage??

Influence of storage on smart grid
Sodium Sulfur (NAS) battery
Vanadium Redox Battery (VRB)
The Zinc Bromide (ZnBr) battery
Lithium Ion (Li-ion)
Capital Costs ($kW-hr) Very High ($600 –

Life Cycle Number of charge/discharge cycled to
80% DOD
Medium (2,000–5,000)
% Round Trip Efficiency
AC to AC
Very High (85% to95%)

Life Cycle Number of charge/discharge cycled to
80% DOD
Medium (3,000–5,000)

% Round Trip Efficiency AC to AC High (85% to 90%)
Capital Costs ($kW-hr) Medium ($350 – $500/kW-hr)

Life Cycle Number of charge/discharge cycled to
80% DOD High upto 10000

% Round Trip Efficiency AC to AC Medium (70-75%)
Capital Costs ($kW-hr) Low ($150–$250/kW-hr)

Life Cycle Number of charge/discharge cycled to
80% DOD High (>10,000)

% Round Trip Efficiency AC to AC Medium (60-70%)
The typical grid energy storage applications are summarized on the following

Spinning reserve- The energy storage system is maintained at a level of charge ready to respond to a generation or transmission outage.

Frequency regulation/Power quality- - The energy storage system is charged or discharged in response to an increase or decrease, respectively, of grid frequency.

Capacity firming- The variable, intermittent power output from a renewable power plant, such as wind or solar, can be maintained at a committed (firm) level for a period of time.

Load leveling- Load leveling usually involves storing power during periods of light loading on the system and delivering it during periods of high demand.

Voltage support- An energy storage system can help to maintain the grid voltage by injecting or absorbing both active and reactive power.

Peak shaving-Peak shaving is similar to load leveling, but may be for the purpose of reducing peak demand rather than for economy of operation.

Applications of Storage Systems in Smart Grid
For storing wind or solar, cycle lives of 10,000 or greater will be needed (300 to 500 cycles a year times 30 years)
How storage devices and renewable energy sources influence and work in smart grid.
DER equipment may not at all be suited to control voltage and frequency
Voltage and frequency can get out of range so that installed equipment may destroy
Even if DER control voltage and frequency the utility may not be able to supervise the plant (dangerous for technicians).
Islanding planned in advance and system and equipment designed to cope with situation.
DER is well suited to control voltage and frequency in islanded grid.
Industry use islanding operation where the process has surplus energy that is used to used to produce electricity during black outs.
Plants can switch to internal production while isolating the grid.
Emergency backup power in hospitals.
Block Diagram, Wind Energy Generation and Integration
Renewable Energy Sources
Wind Energy
Solar Energy
Tidal Energy
Biomass Energy
Geothermal Energy

[1] Bradshaw, Dale T., Modern Grid Strategy Team, Leader Emerging Technology August 8, 2009.

[2] Control for renewable energy and smart grid,Eduardo F. Camacho, Tariq Samad, Mario Garcia-Sanz, and Ian Hiskens 2011

[3] NREL (National Renewable Energy Laboratory). NWTC Design Codes (FAST), An Aeroelastic Design Code for Horizontal Axis Wind Turbines, 2010.

[4] U.S. Department of Energy. Office of Electricity Delivery and Energy Reliability, Recovery Act Financial Assistance Funding Opportunity Announcement, Smart Grid Investment Grant Program, DE-FOA-0000058, June 25, 2009.

[5] NREL (National Renewable Energy Laboratory). NWTC Design Codes (FAST), An Aeroelastic Design Code for Horizontal Axis Wind Turbines, 2010.

[6] The d-.q- axis control technique of single phase grid connected converter for the wind turbines with MPPT and anti islanding protection, Jirawath Benjanarasut, and Bunlung Neammaner (Department of electrical engineering King Mong Kuts university of technology Bankok)

[7] Determining MPPT and Anti islanding techniques in a grid type PV inverter. B Blackstone, Y Baghzouz. Senior members IEEE

[8] Islanding detection method of distributed generation units connected to power distribution systems. J.E. Kim,member IEEE, J.S Hwang
Role of Renewable in Smart grid
Power systems have addressed the uncertainty of load demand by controlling supply. With renewable energy sources, uncertainty and intermittency on the supply side is managed.

Local storage or generation can help with managing varying grid supply.

It is infeasible for a centralized controller to address every controllable load individually, yet actions taken by local controllers are consistent with global performance objectives

How power is distributed smoothly between asynchronous grids and protection of the equipment’s in Distributed Energy Resources.
Storage and Renewable Energy Resources in Smart Grid
Presented to
Saeedah Hamidifar
Presented by
Alam Mumtaz
Akshay Pingili
Abid Ali Mushtaq
Saad Mazhar Naeemi
Lithium Ion (Li-ion)
The Zinc Bromide (Zn Br) battery
Advanced battery solutions which are most commonly deployed
Vanadium Redox Battery (VRB)
Flywheel energy storage - works by accelerating a rotor (flywheel) to a very high speed and maintaining the energy in the system as rotational energy.
Pumped hydroelectric storage - The method stores energy in the form of potential energy of water, pumped from a lower elevation reservoir to a higher elevation.
Of the variety of energy storage technologies that could support a smart grid, advanced batteries may offer the broadest potential
Compressed Air Energy Storage (CAES) - Compressed air energy storage (CAES) is a way to store massive amounts of renewable power by compressing air at very high pressures and storing it in large underground caverns, depleted wells or aquifers.
Typical grid energy storage applications
Simulate the energy storage working with inverters and consumer's utility.
Simulate the working and control of wind turbines to demonstrate the integration of DER with grid.
Simulate the VFT to demonstrate the operation to prevent the DER from damage and de-energize the bus.
Renewable resources
Superconducting Magnetic Energy Storage (SMES)-Superconducting magnetic energy storage (SMES) is an energy storage device that stores energy in the form of dc electricity that is the source of dc magnetic field.
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