The Future Grid and Energy Storage

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Presentation transcript:

The Future Grid and Energy Storage Eric Kim CAISO Infrastructure & Regulatory Policy  

The California Independent System Operator (CAISO) Nonprofit public benefit corporation created by CA statute regulated by the Federal Energy Regulatory Commission (FERC) not a government agency One of 38 balancing authorities in the western interconnection 50,270 MW record peak demand (7/24/2006) Serving 80% of CA & bit of NV 31,000 daily market transactions $9.3 billion market 30 million people served

Key functions of the CAISO 2/15/2017 Key functions of the CAISO Uses advanced technology to balance supply and demand every 4 seconds Operate markets for wholesale electricity and reserves Day Ahead Fifteen Minute Five Minute Oversees future transmission planning and new generator interconnections Folsom, California

Reliably operating the system has grown more challenging Net load of 7,149 MW on Feb 8, 2018 Typical Spring Day Steeper Upward Ramps Deeper Belly Downward Actual 3-hour ramp of 14,777 MW on March 4, 2018 We must learn how to favorably shift and shape net load to maximize the use of clean, green energy “Less Steep, Less Deep, and Lower Peak”

We must make the duck fly! How are we going to ensure our energy future is resilient, sustainable and efficient? We must make the duck fly!

Planning for the Modern Grid: A suite of solutions include energy storage applications

CAISO has several models available for Energy Storage participation in its markets Proxy Demand Resource, 2010 (PDR) – Distribution Supplier can aggregate multiple end-use customers to create a virtual supply resource May involve other DER types behind customer meter, but will not be settled in market for net energy injection to the system (load offset only) Non Generator Resource, 2012 (NGR) – Transmission & Distribution Designed for a resource that can vary between consuming & producing energy (e.g., storage, V2G) The non-generator resource (NGR) participation model recognizes a seamless operation between generation and load DER Provider, 2016 (DERP) - Distribution Create a pathway for DERs to be aggregated and meet .5 MW minimum participation requirement Allows aggregations from resources in front of and behind the end-use customer meter

Industry-wide collaboration is required to achieve the future of a cost-effective and low carbon grid Wholesale Retail Legal/Regulatory Technology agnostic market participation models that allow large, small, and aggregate resources to participate Grid informed time-variant and dynamic rates (TOU, RTP) Electrification goals and mandates designed to create a sustainable and efficient grid Market structures that reward flexibility and minimize uncertainty Critical peak and critical consumption pricing periods Grid harmonized building codes and appliance standards Regional markets that leverage diversity and generate operational efficiencies Load management programs that reward favorably shifting and shaping energy use Retail markets, structures that create resiliency, grid-informed price signals, and low-friction energy exchange

We must consider the future grid architecture We must consider the future grid architecture. Consider an “integrated decentralized” system with a layered hierarchy of optimizing sub-systems. DSO = Local Distribution Area or Community Microgrid Regional Interconnection Smart building Micro-grid DSO CAISO Balancing Authority Area BAA Optimization Each layer only sees its interchange with next layer above & below, not the details inside other layers ISO optimizes regional bulk system only up to the T-D interfaces: DSO to ISO Layered control structure reduces complexity, allows scalability, and increases resiliency & security Resolve variability and volatility at the grid edge Deep and centralized situational awareness and control not required Top down, centralized control of an increasingly decentralized system is likely not viable or desirable

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