Transcript Ludington Pumped Storage Plant and Wind Power

Ludington Pumped Storage
Plant and Wind Power
Operational Considerations
David Lapinski
Consumers Energy Company
June 16, 2009
Summary
 Ludington
Plant Overview
 Operational Characteristics
 Past & Current Use
 Impacts of increasing wind generation
Ludington Pumped Storage Plant
Ludington Pumped Storage Plant
 In
operation since 1973
 Jointly owned by Consumers Energy and
The Detroit Edison Company
 Pond is 2.5 miles x 1 mile
 Six reversible pump – turbines
 360 feet from Lake Michigan to full pond
level
 27 billion gallons H2O
LPS Operation
Ludington – Well connected to
transmission system
LPS Key Operating Parameters
 1872
MW Generating capacity
 1960 MW Pumping
 15000+ MWh generation storage
 70% cycle efficiency
 Generators quick start & regulation
capable
 Pumps quickly interruptible
Historic and Current Operational
Uses
 Economic
alternative to more expensive
generation to meet load

If value of generation > 1.4 times cost of
pumping
 Ancillary
Services & flexible response to
operational uncertainties
Managing Stored Energy is
Important
 Predictability
of Cost & Value
MISO Day-Ahead LMP
(March 2009)
Example Strategy
Equivalent Energy Stored - MWh
18000
60
16000
50
14000
LMP $/MWh
40
12000
10000
30
8000
20
6000
4000
10
2000
0
0
1
13
25
37
49
61
73
85
hour of week

97
109
121
133
145
157
1
13
25
37
49
61
73
85
97
109
121
133
145
157
Hours
Strategy for economic value, with room for contingencies
Potential Impacts of Increased
Wind Energy
 Reduced
predictability
 Increased variation in supply-demand
balance


Other resources required to compensate for
longer duration variations (10’s of minutes to
hours)
Potential for increased need for ramping
capacity & intermediate term reserves
capacity
Megawatts
MISO Load and Wind Generation
Feb 4-5, 2009
90000
9000
80000
8000
70000
7000
60000
6000
50000
5000
40000
4000
30000
3000
20000
2000
10000
1000
0
2/3/2009 12:00
2/4/2009 0:00
2/4/2009 12:00
MISO Load
2/5/2009 0:00
Wind Generation
2/5/2009 12:00
2/6/2009 0:00
0
2/6/2009 12:00
Storage Technologies Have a Role
 For
short term replacement and balancing,
pumped storage can fill in



rapid response for ramping and contingencies
economic generation to buy time for longer
lead time units to come on line
absorb excess generation
Additional Considerations

Reliance on accurate wind generation forecasts



Optimum storage management changes


Storage Management
Overall system optimization
May require decreasing daily budget of energy
available to day ahead market
Limits on ability to cycle pumped storage units to
compensate for variations.
 Pump mode startup is limited