sierra club of maine climate action conference · cmp rev. req. gs costs gs rev.req. $0 $10,000,000...
TRANSCRIPT
GridSolar, LLC
The GridSolar Pilot Project for Grid Reliability
Sierra Club of Maine
Climate Action Conference
Dr. Richard Silkman, Founding Partner
September 16, 2017
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Electric Grid Reliability:
The Problem
� Grid Reliability is generally a Peak Load Problem
� ME Turnpike Analogy
Maine 2017 Projected Load Duration Curve
and 1,750 MW Critical Load Level
0
500
1000
1500
2000
2500
3000
1 1 9 0 3 7 9 5 6 8 7 5 7 9 4 6 1 1 3 5 1 3 2 4 1 5 1 3 1 7 02 1 8 9 1 2 08 0 2 2 6 9 2 4 5 8 2 6 4 7 2 8 3 6 3 02 5 3 2 1 4 3 4 03 3 5 9 2 3 7 8 1 3 9 7 0 4 1 5 9 4 3 4 8 4 5 3 7 4 7 2 6 4 9 1 5 5 1 04 5 2 9 3 5 4 8 2 5 6 7 1 5 8 6 0 6 04 9 6 2 3 8 6 4 2 7 6 6 1 6 6 8 05 6 9 9 4 7 1 8 3 7 3 7 2 7 5 6 1 7 7 5 0 7 9 3 9 8 1 2 8 8 3 1 7 8 5 06 8 6 9 5
MW
Critical Load Level
1,750 MW
Hours where Load Exceeds
Critical Load Level
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Electric Grid Reliability:
Potential Solutions
� Transmission Solution – Build more Transmission to bring power from away into the Region
� Non-Transmission Alternative or “NTA” Solution - Manage Load and develop new Distributed Generation withinthe Region
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Yesterday’s Electric Grid
Large Central Generating Stations designed to serve 24 x 7 industrial loads using high voltage transmission lines and centralized dispatch control
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Tomorrow’s Electric Grid
Distributed Energy Resources located near commercial loads that are weather sensitive (more peaked) using distributed control technologies
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Smart Electric Grids
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Contrasting Visions
Utility Vision in which peak load is met by large generating facilities located far from load requiring expensive transmission systems
GridSolar Vision in which peak load is met through a smart electric grid using energy efficiency, DR, small-scale distributed solar generation and other resources located close to load
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Boothbay Pilot
Radial nature of electric service and local distribution circuits on the Boothbay peninsula defines the electrical region for the Pilot Project – Total Peak load – Approx. 30 MW.
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Boothbay Harbor, Maine
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Shock and Sag
� When a Reliability Event Occurs, the electric grid has two responses:
� “SHOCK” – frequency and voltage responds immediately, which can cause power failure.
� “SAG” – power flows on specific lines and circuits exceeds carrying capacity causing them to overheat and sag. If sag exceeds clearance, they will short causing power failure.
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Boothbay Pilot
� Hybrid Solution
� CMP – Voltage Support investments to address instantaneous response issues – “SHOCK”
� NTA Options – Manage thermal conditions on conductor feed into the region – “SAG”
� Benefit – Avoid $18 million upgrade to CMP Sub-Transmission Line serving the region.
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Pilot Design
� Term – 3 Years, option to 10 Years
� Need – up to 2 MW of NTA Resources
� modular, can scale with load
� NTA Types – Target 250 kW each� Efficiency
� Renewable DG (125 kW Solar)
� Non-renewable DG (preference net zero CO2)
� Demand Response
� Competitive Bids - PUC approves all contracts
� Cost are recoverable in utility rates
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NTA ResourceskW RFP I RFP II Totals Pct. $/kW M
Conservation 237.0 111.3 348.3 19% 10.47$
Solar 168.8 106.8 275.6 15% 13.19$
BUGS 500.0 0.0 500.0 27% 20.63$
Demand Response 0.0 250.0 250.0 13% 57.65$
Battery 0.0 500.0 500.0 27% 75.99$
Totals 905.8 968.0 1,873.8 100%
19%
15%
27%
13%
27%
NTA Resources By Category
Conserva on
Solar
BUGS
Demand Response
Ba ery
GridSolar Ops Center - Portland
� Dispatch (SCADA) System
� Direct/Cellular Link to Active NTAs
� Data loggers at Passive NTAs
� Command Interface
� CMP dispatch: load, location, duration
� GridSolar: define & issue dispatch order
� Automated, failsafe backup
� Real time monitoring & data logging
� CMP collect data at substations
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Boothbay Pilot – Response
Actual and Reconstituted Loads on August 11, 2016 for CMP’s Boothbay Circuit 209
26000
27000
28000
29000
30000
31000
32000
9:0
0
9:3
0
10
:00
10
:30
11
:00
11
:30
12
:00
12
:30
13
:00
13
:30
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:00
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:30
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:00
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:30
16
:00
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:30
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:00
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:30
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:00
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:30
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:00
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:30
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:00
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:30
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:00
21
:30
Kilowatts
Kilowatts
Kilowatts
Kilowatts
Dispatch & Reconstituted Load
Battery
BUG
Demand
Response
Thermal Energy
Storage
Efficiency
PV Solar
209 Load
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Boothbay Pilot – Response
Response of Passive and Active Distributed Energy Resources –August 11, 2016
-1600
-1400
-1200
-1000
-800
-600
-400
-200
0
9:0
0
9:3
2
10
:04
10
:36
11
:08
11
:40
12
:12
12
:44
13
:16
13
:48
14
:20
14
:52
15
:24
15
:56
16
:28
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:00
17
:32
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:04
18
:36
19
:08
19
:40
20
:12
20
:44
21
:16
21
:48
Kilowatts
Kilowatts
Kilowatts
Kilowatts
PV Solar
Efficiency
Thermal
Energy Storage
Demand
Response
BUG
Battery
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Comparative Costs
$0
$500,000
$1,000,000
$1,500,000
$2,000,000
$2,500,000
$3,000,000
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Comparison of the Annual Costs of the
Transmission and NTA Solutions Over 10-
Year Planning Period
CMP Rev. Req.
GS Costs
GS Rev.Req.
$0
$10,000,000
$20,000,000
$30,000,000
$40,000,000
$50,000,000
$60,000,000
$70,000,000
$80,000,000
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20
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28
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32
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36
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40
20
44
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48
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52
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Comparison of the Cumulative Costs of the
Transmission and NTA Solutions
CMP Rev.Req.
GS Costs
GS Rev.Req.
$5.87
Million$1.75
Million
$75.75
Million
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Findings/Conclusions
1. NTAs can provide the same degree of grid reliability at less cost than transmission solutions
2. While Transmission Costs keep going up and up and up – NTA costs are going down and down and down
3. We are currently utilizing only a tiny fraction of the capabilities of CMP’s increasingly smart electric grid
4. Public policies should encourage not discourage customer installation of Distributed Energy Resources
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Last Thought …
DO NOT underestimate how difficult it will be to implement the lessons learned from the Boothbay Pilot
The barriers utilities will erect –while not insurmountable - are very formidable ... e.g. NYS REV, CMP – Net Metering
GridSolar, LLC
Contact Information
www.gridsolar.com
(207) 772-6190