managing risk in the grid with energy storage

Managing Risk in the Gridwith Energy Storage

Abbas Akhil

Principal, Renewable Energy Ventures, LLC

(505) 280-0997

abbas@revtx.com

9th MeetingNM Renewable Energy Storage Working Group

November 12, 2014

My Background

• PNM, Resource Analysis Group: late 1970’s; 13 yearso Alternate renewable energy assessments

o Reeves solar hybrid repowering study and conceptual design

• Sandia National Laboratories, Energy Storage Program: till

December 2011.o Energy storage and micro-grids

o Lead author of DOE Electricity Storage Handbook, 2013

o www.sandia.gov/ess/publications/SAND2013-5131.pdf

The Electric Grid

• Instantaneously match generation to load• Maintain constant voltage and frequency

• Plan for load growth – capacity additions and T&G upgrades

Types of Risk

• Operational risko Sudden failure of generating unit or loss of transmission pathway

o Sudden changes in renewable energy resources

o Intra-hour load management

• Planning risko Unexpected changes in load growth projections – system and

distribution level

o Distribution and substation upgrades

o Time-of-use or demand charge management – customer level

o UPS functions – customer level

Source: Moving Energy Storage from Concept to Reality:Southern California Edison’s Approach to Evaluating Energy Storage

Source: Moving Energy Storage from Concept to Reality:Southern California Edison’s Approach to Evaluating Energy Storage

Source: Moving Energy Storage from Concept to Reality:Southern California Edison’s Approach to Evaluating Energy Storage

Risk: Intra-hour load management

Daily System Load

50%

100%105%

12 24

Hours

Sys

tem

Loa

dRisk: Distribution and substation upgrades

Daily Load Duration Plot

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References

• Southern California Edison position paper on energy

storage: “Moving Energy Storage from Concept to Reality:

Southern California Edison’s Approach to Evaluating Energy

Storage”

• Cal-ISO paper on uses of energy storage for grid control

http://www.caiso.com/285f/285fb7964ea00.pdf

• DOE Electricity Storage Handbook – 2013 edition

http://www.sandia.gov/ess/publications/SAND2013-5131.pdf

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Questions?

Abbas Akhil

Renewable Energy Ventures, LLC

abbas@revtx.com

505-280-0997

Thank You...