1 / 29

Application of Energy Storage on the AEP Distribution System

Application of Energy Storage on the AEP Distribution System. Presented by: John Mark Neal WV IEEE Section Meeting February 2, 2010. Presentation Outline. AEP/APCo – Who we are Evaluating Energy Storage Opportunities Applying Energy Storage on the Distribution Grid Moving Forward Q&A.

shino
Download Presentation

Application of Energy Storage on the AEP Distribution System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Application of Energy Storage on the AEP Distribution System Presented by: John Mark Neal WV IEEE Section Meeting February 2, 2010

  2. Presentation Outline • AEP/APCo – Who we are • Evaluating Energy Storage Opportunities • Applying Energy Storage on the Distribution Grid • Moving Forward • Q&A

  3. AEP Overview • 5.2 Million customers • 11 States • 39,000 MW Generation • 38,953 miles Transmission • 212,781 miles Distribution • 20,861 Employees

  4. 1.05 Million customers • 3 States • 8,018 MW Generation • 5,360 miles Transmission • 47,981 miles Distribution • 4,252 Employees APCo Overview

  5. Utilities’ Interest in Energy Storage • Participation of utilities in Electricity Storage Association (ESA) , the most widely recognized trade association on energy storage, has significantly increased since 2000 • EPRI has established an Energy Storage Program that has active participation from member utilities • DOE ‘s Energy Storage program is paying more attention and participating in large-scale utility application projects. Utilities are invited to participate more in drafting and interpreting energy policy act • The dialogue between suppliers of energy storage devices and utilities has significantly increased over the last five years • Over the last 12 months, there have been over 5 different energy storage seminars and panel discussions with increased participation by utilities (there used to be only one in 2000 with little utility participation)

  6. Challenges to Deployment of Energy Storage in Utilities Despite a clear increase in utilities’ interest in energy storage, deployment of storage has been relatively slow due to several factors including: • High cost of new storage technologies discourages utilities to use storage for improved service reliability and security for customers without some incentives or assurance that its cost will be shared by customers • Storage benefits are very diverse impacting both customers and utilities. Even within utilities, storage benefits are spread widely over different businesses units from generation to distribution with independent budgetary responsibilities • Separation of different utility businesses (distribution, transmission, generation, energy trading, etc.) makes it hard for any one of these businesses to justify the total cost of energy storage for only the partial values that benefit that particular business unit.

  7. Maintenance Future Line Some Immediately Realizable Benefits of Energy Storage • A Quick solution to Reliability and Capital Deferral: • Provide contingency power to single-source loads • Maintain service during system repairs • Defer Investment Improved Service Reliability

  8. Energy Storage Benefits Improved Service Reliability is achievable both Short-Term and Long-Term

  9. Other Benefits of Energy Storage • Asset Optimization - Demand reduction on all utility assets in Generation, Transmission and Distribution • Renewables - Time Shift and Capacity Firming for renewable energy sources like wind and solar • Distributed Generation - Dispatchable Energy Buffer between utility and customer-owned generation Energy Storage Improves Reliability Today and Tomorrow

  10. Storage Options for Utility Applications • 1-10 MW, 4-8 hour storage systems for DG • After reviewing all feasible technologies, AEP selected Sodium Sulfur (NAS) battery for this application • NAS strengths: • Commercial availability • Cost • Favorable field experience • Compactness • Modularity • Transportability

  11. Commercial Commercial Industrial Industrial Gensets , Solar, Fuel Cells (FC), Load Management (LM) Gensets , FC, LM AEP Vision on Future Utilities AEP Believes that Distributed Energy Storage will be a Strategic Component in the Future Grid of the United States Transmission Transmission Transmission & Distribution Substation Substation Residential Residential Distribution Substation Gensets Gensets , Solar, FC, LM , Solar, FC, LM Gensets , Solar, Fuel Cells (FC), Load Management (LM) Gensets , FC, LM

  12. 290-360 ºC What is a NAS Battery? • Nominal AC capacity: 50kW, 360 or 430kWh (320 or 384 cells) • L x W x H = 2.3 x 1.7 x 0.7 = 2.9 m3 • 3500 kg; NAS has liquid electrodes and solid electrolyte

  13. Module Firing Test Module Crush Test Module Drop Test Cell Burning Test Is NAS Safe? 15 Years – No Accidents Designed and packaged to be safe

  14. NaS Battery Installation – Environmental Issues • These batteries contain no CERCLA Hazardous Substances or EPCRA Extremely Hazardous Substances (with the exception of sodium, which if released, has an RQ of 10 pounds) • These batteries meet the OSHA "article" exemption, therefore an MSDS is not required (however, we have created one that is very useful) • Since an OSHA MSDS is not required for the battery, they are not reportable under SARA Tier II . However, since this is a groundbreaking activity, we will inform the LEPC, SERC and local Fire Departments of their presence, even though it is not "required". • The creation of a hazard communication plan would be a Best Management Practice for us to follow. This hazard communication plan will include emergency response information and emergency contact information and will always be available to the operators. • There are no environmental operating permits required for the operation of these installations • The only environmental regulations that are imposed upon these batteries are those that are to be followed during transportation of the batteries and during the disposal and / or recycling of the batteries.

  15. Is it Safe to Deploy NAS in the Community ? Japan’s 15 year experience Indoor Applications Integrated into Residential Neighborhood

  16. Tyler Mountain Feeder 46 kV bus 12 kV bus North Charleston Feeder 46kV/12kV Transformer 12/16/20 MVA Voltage Regulator West Washington Feeder AEP’s First Commercial Energy Storage System • Charleston, WV • 1.2 MW, 7.2 MWh • Operational since June 26th 2006 • Deferring building a new substation

  17. Load Leveling – Summer 2007

  18. AEP Substation-Scale Storages – 11MW, 75MWh 1 MW, 7.2 MWh installed in 2006 • Deferred substation upgrades • 3 x2MW,14.4 MWH installed in 2008 • Demonstrated “Islanding” • 4MW, 25MWh substation will be on-line in 2010 The New “Islanding” feature is Partially Funded by DOE/Sandia

  19. One-Line Milton Station 138kV 765kV Approx. 4 miles Target Site Area

  20. Dynamic Islanding – Backup Power This First Community-Scale Backup Power with NAS Battery is Partially Funded by DOE/Sandia

  21. Live Islanding Test Information • Test Site : Balls Gap, Milton, WV • Test Date: July 8, 2009 • Island Size: 700 customers • Time to island customers: 0.5 to 2 min. • Power Outage Duration: 28 min. • Time to Exit Island: 6 sec. (not Synchronized) • Average Island Load: 0.8 MW

  22. SOC= 100% Stored Energy MWh SOC= 97% Islanding period = 28 min • Battery • Load • (kW) Islanding Data – Battery Load & Energy

  23. Islanding Opportunities • September 8, 2009 Breaker interruption at Milton Station No island established by system Exposed flaw in design – required addition of a new device • December 19, 2009 Multiple faults and interruptions on Balls Gap feeder Partial island established by system25 customers served by DESS for two days • December 25, 2009 Single Phase hydraulic recloser interrupted on Balls Gap feeder No island established by system Battery unavailability may be reason –data still being analyzed Learning operational nuances that each new event brings

  24. Community Energy Storage (CES) CES is a small distributed energy storage unit connected to the secondary of transformers serving a few houses or small commercial loads • Uses New or Used PHEV- EV batteries • Offers All Values of Substation Batteries when aggregated, • Offers Backup Power to customers • Buffers Customer Renewable Generation • Makes PHEV Charging Time a less critical issue

  25. CES Control Hub Integration Utility Dispatch Platform Center /SCADA Communication & Control Layout for CES Substation CES CES CES CES Power Lines Communication and Control Links CES – A Virtual Substation Battery CES is Operated as a Fleet offering a Multi-MW, Multi-hour Storage • Grid Benefits: • 4) Load Leveling at substation level • 5) Power Factor Correction • 6) Ancillary services • Local Benefits: • 1) Backup power • 2) Voltage correction • 3) Renewable Integration

  26. Advantages of CES to Substation Batteries While CES is, Functionally, a Multi-MW, Multi-hour Substation Battery, It has some Inherent Advantages: More reliable Backup Power to customers (closer) More Effective in providing Voltage Support (distributed) More likely to be a standardized commodity (low cost) More Efficient in buffering customer renewable sources More synergy with Electric Vehicle batteries (competition) Easier installation and maintenance (240 V) Unit outage is less critical to the grid (smaller) Lower resistive loss in wires (closer to customer) A better fit into the Smart Grids & MicroGrids

  27. Graphics adapted from an EPRI Presentation by Joe Hughes Large Central Units Substation Batteries Storage at Grid Edge Migratory Path of Utility Energy Storage– in AEP This Migration Trend is Driven by Popularity of Customer-Owned Distributed Resources and Customers’ demand for higher service quality

  28. AEP’s View of Energy Storage Value 120/240 V 480 V 765 kV 4 to 34 kV 345 kV 138 kV 69 kV NAS (Substation) CES (Community) Pumped Hydro (Central) Storage Value • Devaluators: • Limited Value to Customer • High Security Risk • Less effective in removing Grid Congestions • Devaluators: • Aesthetics Central Units Distributed Units

  29. Wrap Up Questions?

More Related