Over the last week North Island storage has continued to increase and is now sitting at 88% of average. Storage in the South Island remains above average at 112%, and national storage is at 109%.
This will be our last newsletter in this format as after today we will be providing our Security of Supply update on a Thursday with the first update being produced on Thursday 18 July. The revised formatted newsletter will contain:
the Electricity Risk Meters
the NZ Electricity Risk Curve
a brief narrative on the current situation and
a link to the more comprehensive security of supply data on the Transpower website.
Aggregate New Zealand storage increased over the last week and is at 69% of total storage, this is above the historical average (114% of average) for this time of the year.
Weekly hydro generation over the last 12 months has ranged between 54% and 66% of total generation. Last week hydro generation contributed 59% of total generation.
Hydro Storage Update
Controlled storage remains above average on the New Zealand and South Island hydro risk curves.
Inflows into Lake Taupo over the last week were higher than the historical average for the time of the year and there was an increase in North Island storage.
South Island inflows were similar to the historical average over the last week and storage levels have also increased.
The spot price, based on available final and interim prices, has averaged $96 per MWh over the last two weeks, this is higher than prices experienced this time last year.
We periodically update the base HRC data curves and the Simulated Storage Trajectory Curves. The updated files for these are available on the Hydro Risk Curve page.
Data
Last Updated
Hydro Risk Curve Data File and Input Assumptions
25 June 2019
Simulated Storage Trajectories and Assumptions
21 May 2019
Next Report
The next scheduled weekly Security of Supply Report will be in the new format and is due Thursday 18 July 2019.
