2021 Investor Day Presentation
Future dry year flexibility scenarios
(1) 610MW Southland demand
This could either be new or existing demand
Flex production down in times of hydro inflow scarcity,
and falling lake levels, in incremental steps
Across all hydrological history, demand reduction is
low 250GWh pa (5% of annual production)
This can vary between 0 and 1,500GWh (30% of
production) with the extreme occurring infrequently,
<1% of all inflow years
No flexibility at all is required in up to 75% of all
hydrological years
On rare occasions of extreme stress, the market could
consume the entire load of the facility (610MW) for a
number of weeks or even months
# of years
Annual
output
250
200
150
100
Count
SumProb
50
Demand Consumption with Dry-Year Flexibility
Southland Stimulation; 610MW dry-year flexible H₂; no thermal
-- Flexible Pivot Point
<3,750 3,750 3,850 3,950 4,050 4,150 4,250 4,350 - 4,450 4,550 - 4,650 4,750 - 4,850 4,950 - 5,050 - 5,150 -
3,850 3,950 4,050 4,150 4,250 4,350 4,450 4,550 4,650 4,750 4,850 4,950 5,050 5,150 5,350
annual generation [GWh]
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
sum prob (# years)
Source: Meridian
The need for flexibility in large scale demand is
modest but with some extreme usage seen in rare,
dry years
Meridian.
11 MAY 2021 |
2021 INVESTOR DAY PRESENTATION
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