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BREAKOUT SESSION 2Smart Grid 2-B: Grid Integration – Essential Step for Optimization of Resources
Integrating Intermittent Wind Generation into
an Island Diesel Grid using the Demand Dispatch of
Thermal Energy Storage
Ron Kurtz
Director for Sustainable and Renewable Energy Markets
Dimplex North America
The Problem – End of Life Diesel Generation
•Shetland Islands are 55 miles NE of Scotland with 22,000 inhabitants.
•Scottish & Southern Energy manages the distribution grid and their key generation asset, a 67 MW diesel generating station is near end-of-life.
Background
•Europe’s 2020 strategy includes reducing greenhouse gas emissions by at least 20% and increase the share of renewable energy to 20%.
•Shetland has an excellent year-round wind resource and 50% load capacities are achievable
Drivers
Integration of Intermittent Renewable Generation is Limited
Non-WindGeneration
WindGeneration
MW
Generation Load Factor
Non-Wind %
Wind %Time
5000
4000
3000
2000
1000
0
100%
75%
50%
25%
0
50% LimitOn grid
Source: Eirgrid
24% wind in November
All-Ireland – November 2011
Energy Storage Capabilities
Typical Energy Used per Day
15 kWh(60 miles per day)
Electric Car
15 kWh(55 Gallons per day at 150 F)⁰
Smart Water
Heating
100 kWh(1700 ft² home in
winter)
Smart Space
Storage Heating
Decouples the Energy Equation:• Energy In – Accepts electrical energy when it’s less
expensive, in-excess or required for grid balancing.• Energy Out - User receives heat energy based on their
comfort needs.
Anatomy of a Storage Heater
Can store up to50 kWh of
thermal energy
Thermostatically controlled
fan to distribute heat
UK Demand Off-Set by Storage Heating
40
Direct ElectricHeating Demand (GW)
Non ElectricHeating (GW)
Daytime Hours
GW
70
60
50
30
20
10
0
00.0
0
01:0
0
02:0
0
03:0
0
04:0
0
05:0
0
06:0
0
07:0
0
08:0
0
09:0
0
10:0
0
11:0
0
12:0
0
13:0
0
14:0
0
15:0
0
16:0
0
17:0
0
18:0
0
19:0
0
20:0
0
21:0
0
22:0
0
23:0
0
StorageDemand (GW)
December 7th 2010 - Actual
6,500,000 Storage Heaters charging with a connected off-
peak load of 16.5 GW.
UK Nuclear Off-Set by Storage Heating
70
60
50
40
30
20
10
0
00.0
0
01:0
0
02:0
0
03:0
0
04:0
0
05:0
0
06:0
0
07:0
0
08:0
0
09:0
0
10:0
0
11:0
0
12:0
0
13:0
0
14:0
0
15:0
0
16:0
0
17:0
0
18:0
0
19:0
0
20:0
0
21:0
0
22:0
0
23:0
0
Direct ElectricHeating Demand (GW)
Non ElectricHeating (GW)
Daytime Hours
GW
7GW additional load
Six (6) nuclear reactors would be needed to
meet demand ifstorage heating was
switched to direct electric heating demand
Integrating Renewable Generation
How We
Generate Powe
r Today
• As electricity is not easily saved or stored, it has to be generated to meet demand and the system has to be in balance
• Today’s power axiom is “generation following demand
Intermitte
nt Generation like
Solar &
Wind?
• Tomorrow’s axiom is “load to follow generation”
• Turn on loads (energy storage) during excess energy periods
• Turn off loads during expensive or high demand periods
Dispatchable Thermal Energy Storage
Hub 915 MHz RF
Home AreaNetwork
IP over Home Router
ZigBee via Utility Meter
Cellular Network or Radio
Load Aggregator
The Northern Isles New Energy Solutions (NINES) Approach:
• Build the Viking wind farm.• Install the Quantum Smart Energy Thermal
Storage solution in 1,000 homes with a connected load of 8 MW and 50 MWh of storage capacity.
• Install Europe’s largest battery (1 MW).• Reduce the size of the replacement diesel plant
by 30%.
The Solution
A WIN - WIN Solution
Enables more Renewables onto the Electric Grid reducing CO₂ Emissions
Provides Valuable Ancillary / Regulation services to the Grid Operator
Highly Reliable, Low-Cost Thermal Energy Storage for Demand Response
Offers Real Choice in Off-Gas Grid Areas and High-Rise Apartments
Ron Kurtz,
Director, Sustainable and Renewable Energy Markets
[email protected] - (519) 650-3630 x523
