1 May 2020
The system operator’s is communicating its approach to outage coordination and assessment during the COVID-19 epidemic. The Outage Planning Policy and will continue to dictate the system operator’s approach but we will need to consider different risks to reflect the current system conditions and uncertainties. Further details can be found in this document [ pdf 226.67 KB ], which was also communicated via a Customer Advice Notice [ 178.41 KB ] published on 01 May 2020.
The System Operator has made further changes to the value of AUFLS exempt demand in the Reserve Management Tool (RMT) following observed increases in demand. This change will be made today and will become effective from 00:00 4 May 2020. Further details can be found in the following Customer Advice Notice [ 89.07 KB ]published on 30 April 2020.
14 April 2020
Automatic Under Frequency Load Shedding (AUFLS) is the key control in the System Operators response to avoid cascade failure for an extended contingent event (ECE) such as the total loss of the HVDC Bipole or an “other” major non credible event
With the significant changes to the demand profile, we are asking AUFLS providers to contact us about any concerns they may have about their ability to meet their AUFLS obligations. This will allow us to assess the risk of any under or over provision and determine any mitigations which may be required. Further details can be found in the following Customer Advice Notice [ 89.22 KB ]published on 14 April 2020.
In addition with the reduction in industrial demand due to lockdown, the amount of exempt AUFLS load considered in our reserve management tool (RMT) needed to be changed today. Indicative analysis suggests 75 MW additional north HVDC transfer would be covered by AUFLS reserves from the change to the quantity of exempt industrial demand. The change will become effective from 00:00 15 April 2020.
We will continue to monitor the situation and are requesting any participant with exempt AUFLS load to provide advance notice to us of their plans to change their demand by 50 MW or more until further notice. Further details can be found in the following published Customer Advice Notice [ 90.79 KB ].
9 April 2020
We have published a Customer Advice Notice [ 254.58 KB ] and an assessment on Upper North Island low loads [ pdf 347.54 KB ] . The Covid-19 level 4 restrictions have led to very low electricity demand and as a result we are seeing higher system and network voltages overnight. This CAN and assessment explain how the system operator would manage significant further overnight demand decreases, and further reductions in generation in the region, in the unlikely event we were to see these.
8 April 2020
With reducing demand, particularly from the major industrial users, we have seen a drop in Interruptible Load (IL) being available to offer into the reserve market. The market continues to run securely. We are seeing approximately a 50% reduction in IL.
7 April 2020
- The NZGB April 2020 Report has been published. It includes studies of the standard loads and the lower loads that have been seen during the Covid-19 lockdown. Generation balance forecasts are improved by the lower loads.
27 March 2020
- We published a ‘Market Matters’ [ pdf 411.08 KB ] today looking at the way France’s load changed during ‘lock down’, and looks at the first day of NZ lock down.
- One factor in demand reduction is reduced industrial load. This spreadsheet [ xlsx 12.43 KB ] summarises industrial non-conforming loads.
25 March 2020
- We have our emergency response plan in place to maintain system security.
- Following the elevation in New Zealand alert levels, we expect reductions in load and changes in the timing and shape of peak loads and are adjusting our load forecasts.
- We remind market participants to keep the information on plant outages and availability up to date in POCP, and to ensure bids in the market schedules are up to date.