Emergency Management Policy

The Emergency Management Policy (EMP) sets out the steps that we will take, as a reasonable and prudent operator, during an extended emergency.

One of the functions of the System Operator, specified in the Code, is to prepare and publish an Emergency Management Policy.  As part of the transition to the current regulatory regime, effective from 01 November 2010, the Electricity Authority published an initial policy.  The System Operator revised and gained Electricity Authority approval for an updated Emergency Management Policy 2013. 

Early 2016, through industry consultation, the System Operator updated the policy and gained Electricity Authority approval in May 2016.  A link to the approved version of this policy is in the Approved Policy section below.

Approved Policy

The updated Emergency Management Policy (EMP), sets out the steps that we will take, as a reasonable and prudent operator, during an extended emergency.  The steps to be taken include the requirement for us to initiate an official conservation campaign under pre-determined conditions and, if needed, manage and co-ordinate planned outages as an emergency measure in anticipation of, or during, prolonged energy shortages.

Emergency Management Policy [ pdf 215.85 KB ] (effective from 19th June 2016)

Transmission Outage Management in Dry Winters

Under the Emergency Management Policy, the system operator will consider the ability of outages to affect our management of a dry winter. The system operator’s role in outage management is to assess and coordinate outages, both in the transmission system and from other asset owners. During a dry winter, to preserve security of supply the system operator may request that the grid owner (or other asset owners) reconsider its outages.

To support this process, the Operations Planning team within Transpower’s Operations division has established an outage watchlist and will look at options to mitigate outages that could limit HVDC transfer, use hydro catchments with higher storage, and constrain the operation of thermal power stations.

From the 2017 dry winter we have an existing process to follow around outages and grid configurations as hydro storage pushes towards the 1 percent hydro risk curve. The diagram below summarises this.

 

Gas Disruption Scenarios

CAENZ - Long Term Gas Supply Disruption Scenarios [ pdf 6.03 MB ]
Gas Disruption Scenario - Operational Response [ pdf 87.79 KB ]

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