technical and financial benefits of electrical energy storage

8/12/2019 Technical and Financial Benefits of Electrical Energy Storage

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2012 IEEE EPECElectrical Power and Energy ConferenceResilient Green Energy Systems for a Sustainable Society

October 10-12, 2012London, Ontario, Canada

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Optimises the match between demand and generation

reduction of greenhouse gases emissions;

Improves the grid utilisation by storing and moving low-cost power into higherprice markets reducing peak power prices.

Complements the primary generation by reducing the cycling and dispatch oflarge fossil units meant for baseload.

Increases the value and the amount of renewable energy in the grid transforming take it when you can get it into scheduled power.

Improves the security and assurance of the grid participation to voltageregulation, black start, frequency control, emergency power.

Postpones the need for new transmission assets depending on where storage

assets are placed.

Support the distributed generation (DG) : Storage assets placed atdistribution-voltage substations and integrated into advanced DG devices anduninterruptible power systems.


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Storage devices can be classified by :

1. Technology type :Mechanical, Electrical, Electrochemical

2. Power and energy rating :Large scale, small scale

3. Application :Power quality and reliability, Power networkapplications


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Cost Reduction or Revenue Increase of Bulk Energy Arbitrage:Arbitrageinvolves purchase of inexpensive electricity available during low demandperiods to charge the storage plant, so that the low priced energy can beused or sold at a later time when the price for electricity is high.

Cost Avoid or Revenue Increase of Central Generation Capacity:For areas

where the supply of electric generation capacity is tight, energy storagecould be used to offset the need to: a) purchase and install new generationand/or b) rent generation capacity in the wholesale electricity

marketplace.

Cost Avoid or Revenue Increase of Ancillary Services:These are what mightbe called support services used to keep the regional grid operating. Twomore familiar ones are spinning reserve and load following .

Cost Avoid or Revenue Increase for Transmission Access/Congestion:Transmission access/congestion charges can be avoided because theenergy storage is used.


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Reduced Demand Charges:Reduced demand charges are possible whenenergy storage is used to reduce an electricity end-users use of the electricgrid during times grid is high (peak electric demand periods).

Reduced Reliability-related Financial Losses:This benefit is very end-user-specific and applies to commercial and industrial customers, primarily

those for which power outages cause moderate to significant losses.

Reduced Power Quality-related Financial Losses:Power quality anomalies

of interest are those that cause loads to go off-line and/or that damageelectricity-using equipment and whose negative effects can be avoided ifstorage is used.

Increased Revenue from Renewable Energy Sources:Storage could be usedto time-shift electricity generated by renewables. Energy is stored whendemand and price for power are low, so the energy can be used when (a)demand and price for power is high and (b) output from the intermittentrenewable generation is low.


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Energy Storage has the potential tobecome the sixth dimension of theelectricity value chain with special near-term benefits for renewables and gridmanagement.


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THANKS FOR YOUR ATTENTION

Questions?


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technical and financial benefits of electrical energy storage

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