energy storage - two canadian case studies alex bettencourt€¦ · project to be commissioned q2...
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Energy storage - two Canadian Case StudiesESA Annual Conference, Washington, June 4th
Alex BettencourtManaging Director
Academia / R&D
Utilities
Industry
National Association Made Up of Entire Industry
Two Canadian Case Studies
Power Outages
BC Hydro’s Field Project
Renewable Integration
Hydro One’s Flywheel Project
BC Hydro Overview
General
Crown Corporation
Serving about 95% of province and 1.9 million customers
~10,500 MW demand
Generation
13,800 MW capacity
41 Dam sites, 30 Hydro facilities and 9 Thermal units
> 90% renewable
Wind under contract 790MW, installed 480MW
Transmission
500kV series-compensated backbone
18,000 km of transmission lines, 22,000 steel towers
260 substations
One primary control center + one backup
Interconnected to Alberta and US – part of WECC
Distribution
56,000 km of Distribution lines
Approx. 900K poles, over 300K of transformers
Serve 17 Non-integrated areas
4
5
Issue Golden substation near-capacity
Served via single 69kV transmission line
Peak load ~28MVA
2 x 25kV transformers
Poor reliability indices for Field Single 55km 25kV distribution from Golden
Peak load ~550kVA
Proposal Add 2MW battery energy storage to Golden
distribution network to reduce peak load on substation
Defer transformer upgrades at substation for 2 years
Locate 1MW of the battery energy storage at Field to supply power during feeder outages
Battery Energy Storage Project Opportunity
Schedule Delays
6
Procurement (May 2010 – Mar 2011)
Two separate requests for proposal:
Energy storage technology
Systems integration
Permitting (Mar 2010 – Aug 2011)
Funding from the Federal Government
triggered CEAA (Canadian Environmental
Assessment Application) process
Parks Canada additional permitting
requirements
Fire Incident in Japan (Oct 2011 – Aug 2012)
Construction stopped
NGK investigation and design changes
BC Hydro risk assessment and business case
review
Reduce scope to 1MW in Field only
Design Challenges
7
Civil Design
Operating temperatures -50°C to + 40°C
Maximum snow depth 1.2m
Use metal building to provide snow protection
and fans to cool in summer
Telecom Design
Backhaul from Field to BC Hydro operations
(satellite)
Field area network between battery site and
intellirupter (900MHz radio)
Under cover installation, Field, BC, BC Hydro 2013
Battery Energy Storage Performance
8
Peak Shaving
Daily from 4pm-8pm at set power level
Islanding
9 outages
1 failed to activate
Total of 77 hours of outage prevented
Battery Energy Storage Performance
9
Date Duration Reason
July 15, 2013 7.5 hours Tree
July 19, 2013 9 hours Tree
Sep 21, 2013 9.5 hours Vehicle accident
Sep 27, 2013 8 hours Vehicle accident
Oct 5, 2013 2 hours Vehicle accident
Oct 11, 2013 3 hours Unknown
Nov 15, 2013 Failed to activate Coordination between intellirupter and vista
Nov 19, 2013 14.5 hours Tree, snow, wind
March 8, 2014 23.5 hours Highway closure/avalanche
Islanding
Project Case StudyPartner: Temporal Power
Challenge/Requirement 20MW of wind power connected to 40 km feeder line in Southwestern Ontario, Canada. It is causing significant voltage swings and power quality problems due to intermittent ramping of wind turbines.
Temporal Power Solution5MW flywheel facility will provide power quality and voltage support
Project Launch DateProject to be commissioned Q2 2014
Temporal Power Flywheel
• A FLYWHEEL system stores electrical energy and can be thought of as a “Kinetic Battery”.
• Flywheels work by accelerating a rotating mass to a high speed and using the momentum to generate electricity when needed.
• Using fully recyclable components, Temporal Power flywheels are clean technology solving some of the most challenging issues on power grids around the world.
Flywheel Project
12
5 MW Flywheel Model
(2.5 MW shown)
5MW System Specifications
Energy Capacity 500 kWh
Power Output 5 MW
FESS Efficiency > 90%
Response Time < 10 ms
Input Voltage 480 VAC
Temperature Range -40 to 40 °C
Cycle Life > 250,000
Discharge Depth 100%
13
The Problem & Solution
Location: Tillsonburg TS M2 feeder
Large wind farms on the feeder are causing power quality issues
Customer’s are impacted by fluctuating voltage and system losses are increased as a result
Sub-station tap changers are unable to regulate the voltage fast enough and classic compensation methods can’t address the full issue
Actual Voltage Waveform at Wind Farm Connection
Corrected Voltage Waveform (Calculated)
0.97
0.98
0.99
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1.06
1.07
0.97
0.98
0.99
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1.01
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Additional High Power Flywheel Applications
• Energy storage is often the only or most cost effective way to balance energy on power grids over short periods of time.
• Whether balancing momentary grid-wide differences between supply and demand, stabilizing frequency and voltage on isolated grids, or providing ramping control to better integrate renewable power, these highly demanding grid functions are best met with high performance energy storage solutions.
• Temporal Power specializes in highly demanding applications where typical duration times of 3 to 15 minutes of fast acting energy storage operate for thousands of cycles annually, to continuously keep power grids in balance.
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