2021 Investor Day Presentation
Future dry year flexibility scenarios
(2) 750MW hydrogen electrolysis plant
As per scenario #1, flex production down in times of hydro
inflow scarcity in incremental steps
Adding to this: flex production up in times of renewable
surplus: wet, sunny, windy, low demand
A "typical" running load of 550MW
The ability to increase to 750MW during periods of
surplus at lower market prices
Annual consumption the same as previous case (5TWh), a
77% capacity factor, with dry-year flexibility offered back
to the power system, up to 1.5TWh
Strong seasonality in the demand for flexibility
The distribution of potential H₂ plant loading is far
broader than was observed for dry-year demand response
only
energy [GWh per week]
Weekly
output
140
120
100
80
60
40
20
20
28-Jun
...
28-Sep
www.................
Hydrogen Electrolysis Consumption
Southland Stimulation & System Flexibility: all weeks, all hydrologies
M
28-Dec
*II.........
EMPTY____________LINE
28-Mar
28-Jun
28-Sep
.......
28-Dec
5-25th %ile
25-75th %ile
75-95th %ile
...........
..................
28-Mar
28-Jun
28-Sep
28-Dec
Min
Mean
Max
28-Mar
www................
28-Jun
Source: Meridian
Benefits to the system can be significant: increasing
the overall power system capacity factor, dry-year
management, and the ability to absorb more
intermittent renewables
Meridian.
11 MAY 2021
2021 INVESTOR DAY PRESENTATION
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