Previous Market Operations Weekly Reports/ Weekly Insights

This page provides links to our historical Market Operations Weekly Reports, it also lists the weekly insight topic covered in the report.
Landscape view of powerlines across a hill with the coast in the distance

Weekly Insights

Each week in the Market Operations Weekly Report we provide an insight into a relevant topic related to the power system/ electricity market. Listed below are the topics we have covered and a link to the weekly report it was covered in, these go back to July 2020. 

Weekly Insight topicsReport Week Ending Date
Differences in daily generation profile between different solar farms24 Aug 25
Overview of the difference between conforming and non-conforming grid exit points17 Aug-25
Generation mix of the top 10 demand periods10 Aug-25
Tie-breaker constraint in Scheduling, Pricing and Dispatch3 Aug-25
Contribution to peak demand from different renewable generation types27 Jul-25
Energy Supply from Different Renewables20 Jul-25
Tekapo A electrical islanding13 Jul-25
Significant Wind Fluctuations on the System6 Jul-25
Security of Supply Assessment 202529-Jun-25
Total and Net Winter Load Peaks22-Jun-25
Ancillary Services Procurement Plan Update15-Jun-25
Week-Ahead Dispatch Schedule Overview and Example8-Jun-25
Energy Security Outlook 1011-Jun-25
SPD Link Risks25-May-25
Real-time versus forecasted intermittent offers and the centralised forecasting system18-May-25
2025 draft Security of Supply Assessment11-May-25
Severe weather impacts on Aotearoa's power system4-May-25
Potential Future Pipeline of Battery Energy Storage Systems (BESS)27-Apr-25
Ancillary Services Procurement Plan Review 202520-Apr-25
Evolution of Cogeneration in NZ's Electricity Market13-Apr-25
Solar winter peak contributions6-Apr-25
Evolving Supply Pipeline30-Mar-25
Recent inflow event provides little reprieve for controlled hydro storage catchments23-Mar-25
Hydro Storage and Weekly Spot Prices16-Mar-25
SOSFIP Review Issues Paper9-Mar-25
Causes of hydro storage decline2-Mar-25
Causes of hydro storage decline23-Feb-25
Variation in wind farm output16-Feb-25
Security of Supply Outlook9-Feb-25
Zero price periods and market node constraints2-Feb-25
Changing Load Profile26-Jan-25
Spike in prices following an Under-Frequency Event19-Jan-25
Holiday load profiles12-Jan-25
Powering Santa's Workshop22-Dec-24
Price separation during unplanned HVDC outage15-Dec-24
November vs. July load profiles8-Dec-24
System Operator consultations1-Dec-24
Changes in Industrial Load24-Nov-24
North Island Price Separation17-Nov-24
Near zero wind generation10-Nov-24
October ERC Update3-Nov-24
New and upcoming generation in 202427-Oct-24
AC transmission line setting North Island risk20-Oct-24
Causes of recent low demand13-Oct-24
Security of Supply Outlook6-Oct-24
Renewable generation, periods of peak demand and new generator commissioning29-Sep-24
Low Residual Customer Advice Notices last week22-Sep-24
Significant increase in hydro storage levels15-Sep-24
Forecast of generation potential (FOGP)8-Sep-24
Low energy prices, high wind generation and low demand1-Sep-24
Low generation from Waitaki Hydro Scheme last week25-Aug-24
Consultation for an Adjustment to Alert Contingent Storage Release Boundary18-Aug-24
Near record low hydrology11-Aug-24
Reversing HVDC trends4-Aug-24
Declining hydro storage in July 202428-Jul-24
Low wind generation last week21-Jul-24
Thermal generation, hydro storage and spot prices14-Jul-24
Evolving market resource co-ordination in New Zealand7-Jul-24
2024 Security of Supply Assessment (SOSA)30-Jun-24
2023 Load Duration Curve23-Jun-24
Reserve scheduling and dispatch after an under frequency event16-Jun-24
Geothermal Development Over the Years9-Jun-24
Residual and Energy Shortfall2-Jun-24
Average household winter electricity consumption during weekdays26-May-24
Managing Solar Weather19-May-24
10 May 2024 Morning Peak12-May-24
Wind and Solar Variability5-May-24
Growth of Wind Turbines and Farms28-Apr-24
Large Inflow Periods21-Apr-24
Electricity Risk Curves 10114-Apr-24
Overview of Market Schedules7-Apr-24
How Does Price Correlate with Hydrology?31-Mar-24
How Does Price Correlate with Demand?24-Mar-24
High spring washer prices at Invercargill and Tiwai17-Mar-24
Net Free Reserves (NFRs)10-Mar-24
Real Time Price Inversion3-Mar-24
Last week's potential South Island Reserves Shortfall CAN25-Feb-24
Intermittent generation forecast accuracy18-Feb-24
Persistence wind offers11-Feb-24
Deeper look at prices from last week4-Feb-24
Deeper Look at Price's from Last Week 28-Jan-24
Factors influencing recent high prices21-Jan-24
Summer load profiles14-Jan-24
Low demand over the holiday period7-Jan-24
Alternative Energy Sources for Santa's Sleigh17-Dec-23
2023 Year in Review10-Dec-23
North island wind risk group3-Dec-23
Solar PV26-Nov-23
New wind risk group setting North Island risk19-Nov-23
Security of Supply Assessment (SOSA) Reference Case and Sensitivities12-Nov-23
Low Residual CANs5-Nov-23
Rugby World Cup Final Loads29-Oct-23
Security of Supply Assessment update22-Oct-23
Tight capacity margins15-Oct-23
Short term effect of large rain events on prices8-Oct-23
Energy demand trend1-Oct-23
Actual wind generation vs assumed wind generation24-Sep-23
Timing Outages to Avoid Peaks17-Sep-23
HVDC Reserve Sharing and Price Separation10-Sep-23
Growth in peak demand3-Sep-23
Contribution of new resources towards meeting peak demand under different scenarios27-Aug-23
Seeking Feedback on SO Market Insight: 'Evolving Security of Supply Assessment in NZ'20-Aug-23
Industry Response to Low Residual CANs13-Aug-23
Industry navigates winter's coldest day6-Aug-23
New Zealand's top ten electricity demand peaks30-Jul-23
Reduced price volatility due to increased thermal commitment23-Jul-23
Thermal commitment after Huntly Unit 5 removal16-Jul-23
Instantaneous reserves and new monitoring requirements9-Jul-23
2023 Security of Supply Assessment: Supply Inputs2-Jul-23
Potential El Niño Effects on Hydro Storage25-Jun-23
Binding HVDC Ramp Constraint18-Jun-23
Price volatility under a highly renewable system11-Jun-23
New SOSFIP - Electricity Risk Curves Interpretation4-Jun-23
Distributors to Bid Controllable Load as Difference Bids28-May-23
Winter Sensitivity Schedules Available on WITS21-May-23
Draft 2023 Security of Supply Assessment Consultation - North Island Winter Capacity Margin14-May-23
North Island wind forecast on em67-May-23
New Island Residual Information in WITS30-Apr-23
HVDC Transfer Limits23-Apr-23
New Hydro Storage Graphs16-Apr-23
New Zealand Total Gas Production11-Apr-23
Load Forecast Weather Input Analysis2-Apr-23
An analysis of last week's low residual situations26-Mar-23
Wind Farm Commissioning19-Mar-23
Real-Time Pricing - Dispatchable Demand and Dispatch Notification12-Mar-23
NIWA Seasonal Climate Outlook March - May 20235-Mar-23
Grid Restoration in Hawke's Bay and Gisborne26-Feb-23
Cyclone Gabrielle Load Changes19-Feb-23
New Zealand's Generation Mix12-Feb-23
North Island Hydro Storage Extremes5-Feb-23
Northern Lakes Taken by Storm29-Jan-23
Low January Inflows Again for 202322-Jan-23
2023 Security of Supply Outlook - Summary15-Jan-23
Periods of Low Load8-Jan-23
Generation Outages18-Dec-22
Record Renewables11-Dec-22
1st December 2022 Price Spike4-Dec-22
Invitation to Comment: 2023 Security of Supply Assessment: Reference Case Assumptions and Sensitivities27-Nov-22
Risk Setter20-Nov-22
Record Renewables13-Nov-22
Why are RTD prices "spiky"6-Nov-22
Real-Time Pricing is Live!30-Oct-22
Real-Time Pricing goes live 1 November 202223-Oct-22
Peak Demand Growth16-Oct-22
Trough Trends and Voltage Management9-Oct-22
Daylight Savings & School Holidays2-Oct-22
Residuals Over The Past 10 Years25-Sep-22
Analysis of Low Residual Situation on 15 September 202218-Sep-22
Analysis of Low Residual Situation on 6 September 202211-Sep-22
Auckland Load Profile4-Sep-22
Hydro Inflows28-Aug-22
Spring Washer Effect & Negative Prices21-Aug-22
New Zealand Generation Balance14-Aug-22
Low Residual Points - MW7-Aug-22
Load Forecast Accuracy Metrics31-Jul-22
Relationship between inflows and changes in hydro storage position24-Jul-22
July 2022 HVDC Transfer Analysis17-Jul-22
Real Time Peak Load vs. Forecasted Half Hour Average10-Jul-22
Load Shedding Analysis3-Jul-22
Peak Load Evolution26-Jun-22
Island Load Sensitivity19-Jun-22
Comparing Price Responsive Schedule (PRS) Prices and Final Prices12-Jun-22
New Zealand Generation Balance forecast5-Jun-22
New Carbon Emissions Plots29-May-22
Draft 2022 Security of Supply Annual Assessment Consultation - North Island Winter Capacity Margin22-May-22
Marsden Point Oil Refinery Closure15-May-22
Transmission Pricing Methodology and Peak Load8-May-22
Instantaneous Reserves Code and Procurement Plan Changes Go-Live 3 May 20221-May-22
Warm weather and rain24-Apr-22
Recovery of Te Anau and Manapōuri lakes17-Apr-22
La Nina climate event and its impact on national hydro storage10-Apr-22
Low Lake Manapouri inflows3-Apr-22
Lake Waikaremoana27-Mar-22
New Demand Charts20-Mar-22
New Demand Charts13-Mar-22
New TESLA load forecast for System Operator6-Mar-22
Why is Tekapo power scheme at half capacity while the lake is spilling?27-Feb-22
HVDC Maintenance Outages20-Feb-22
Manapōuri operating at low end of main operating range13-Feb-22
Lowest January Inflows Ever6-Feb-22
Irrigation Load: Slow to Start30-Jan-22
An overview of the HVDC23-Jan-22
The windiest generation mix in New Zealand history16-Jan-22
2022 Security Of Supply Overview19-Dec-21
Looking ahead to 202212-Dec-21
The evolution of wind generation technology in New Zealand5-Dec-21
Looking to the future energy mix28-Nov-21
Carbon Emissions21-Nov-21
Gas Extraction14-Nov-21
Wind Generation7-Nov-21
Renewable Generation Percentage31-Oct-21
Inflows vs Wind Generation24-Oct-21
South Island Demand Data Pre and Post RCPD Changes17-Oct-21
Daily Demand Peaks10-Oct-21
The rise of small retailers in New Zealand's electricity market3-Oct-21
Annual Peak Demand's Over Time26-Sep-21
Forecasting The Grid Impact of Auckland's Alert Level Change19-Sep-21
Natural Gas Update12-Sep-21
Thermal drop off under lockdown5-Sep-21
From a dry summer to a wet winter29-Aug-21
How lockdown affects national load22-Aug-21
New Zealand's electric vehicle fleet15-Aug-21
New record peak demand8-Aug-21
How installed generation capacity translates to the supply of energy and capacity over winter1-Aug-21
Relationship between Inflows, Storage and Average Prices25-Jul-21
Gas - Reserves Forecast18-Jul-21
A look at intermittent generation forecasting and minimum market participant size11-Jul-21
How do New Zealand's other islands source their power?4-Jul-21
NZ solar generation shows signs of ramping up27-Jun-21
Plus a closer look at this year's hydro storage 20-Jun-21
Plus a look at the inflows over the recent dry scenario13-Jun-21
Plus a look at a past line tripping in a Real Time Pricing context6-Jun-21
A look at what Genesis and Methanex's recent gas agreement brings to the table30-May-21
Plus a look at Standalone Dispatch (SAD)23-May-21
Plus a look at comparison of the generation mix (2020/21)16-May-21
As well as a look at how the hydro inflows for the 2021 year so far compare to historical inflows 9-May-21
A simplified overview into the mechanical operation of a Rankine Turbine2-May-21
Plus a look at the relationship between hydro storage, inflows and generation at Manapouri.25-Apr-21
Effect of the end of daylight saving on the evening peak18-Apr-21
Dry-Year Smelter Demand Response Trigger11-Apr-21
The HVDC as the South Island risk setter causing inter-island price separation4-Apr-21
Unplanned Kupe production outage leads to high prices28-Mar-21
Lower wind generation and higher prices21-Mar-21
Increased risk from lightning led to high Hawkes Bay prices14-Mar-21
Relationship between wind generation and prices7-Mar-21
Thermal contribution to generation mix for last 5 summers28-Feb-21
NZ energy futures21-Feb-21
Hydrological inflows to catchment lakes14-Feb-21
Upward pressure on prices7-Feb-21
Spring washers / HSWPS31-Jan-21
Recent Changes in South Island Hydro Generation24-Jan-21
New Generation at Ngawha online17-Jan-21
Low Demand over the Holiday Period10-Jan-21
The events contributing to the interesting pricing situations in 202020-Dec-20
Huntly generation as a result of the unexpected Kupe gas outage13-Dec-20
Uncertainty of changes to peak NI demand from August 20216-Dec-20
Pohokura production patterns from 2019, 2020 and speculation into 202129-Nov-20
Increase in North Island hydro storage22-Nov-20
Waipipi Windfarm's first generation15-Nov-20
CUWLP and 10 minute offloads8-Nov-20
Wind offer arrangement1-Nov-20
Closer look at Taranaki Combined Cycle's historical generation profile25-Oct-20
Spring irrigation demand starts to increase18-Oct-20
A look into the Ahuroa Gas Storage Facility11-Oct-20
A look into capacity factors of generation over the last year4-Oct-20
Auckland energy consumption during the March and August lockdowns27-Sep-20
A look at inter-island price separation20-Sep-20
Tender for Over Frequency Reserve and Black Start services coming up soon13-Sep-20
A look at electrical islanding at Tekapo6-Sep-20
A look at the on-going Pohokura outages30-Aug-20
A look at snow storage in the Waitaki catchment23-Aug-20
A look at New Zealand's major wind projects16-Aug-20
Sensitivity schedules Proof of Concept launched9-Aug-20
A detailed look into factors affecting on energy prices. Price and demand correlations2-Aug-20
Supersized Pumped Hydro Storage26-Jul-20
Energy Demand Outlook19-Jul-20