System Security Forecast

The System Security Forecast (SSF) is produced every two years and revised every six months if required.

Revisions to the SSF are required if changes to the power system materially affect the SSF. The  SSF Guidelines [ pdf 666.68 KB ] document determines the purpose and principles of the SSF.

Our website has a dedicated page outlining thermal generation decommissioning analysis, including power system operation and security of supply. See Impact of thermal generator decommissioning.

2018

The 2018 System Security Forecast based on new information known by the System Operator.

SSF Change Log [ pdf 506.45 KB ]

Part A Date
Executive Summary [ pdf 515.74 KB ] Aug 2019
Part B Date
Grid Configuration and Operations [ pdf 931.36 KB ] Aug 2019
Part C Date
Study Approach and Assumptions [ pdf 586.1 KB ] Dec 2018
Part D Date
Security Analysis North Island Grid Backbone [ pdf 1.19 MB ] Aug 2019
Security Analysis South Island Grid Backbone [ pdf 1.06 MB ] Aug 2019
Security Analysis Upper North Island [ pdf 689.4 KB ] Aug 2019
Security Analysis GZ01 Northland [ pdf 844.23 KB ] Aug 2019
Security Analysis GZ02 Auckland [ pdf 956.93 KB ] Aug 2019
Security Analysis GZ03 Hamilton [ pdf 848.97 KB ] Aug 2019
Security Analysis GZ04 Edgecumbe [ pdf 912.52 KB ] Aug 2019
Security Analysis GZ05 Hawkes Bay [ pdf 809.87 KB ] Aug 2019
Security Analysis GZ06 Taranaki [ pdf 848.3 KB ] Aug 2019
Security Analysis GZ07 Bunnythorpe [ pdf 1.03 MB ] Aug 2019
Security Analysis GZ08 Wellington [ pdf 1.31 MB ] Aug 2019
Security Analysis Upper South Island [ pdf 679.11 KB ] Aug 2019
Security Analysis GZ09 Nelson Marlborough [ pdf 619.74 KB ] Aug 2019
Security Analysis GZ 10 and 11 Christchurch and Canterbury [ pdf 868.35 KB ] Dec 2018
Security Analysis GZ12 West Coast [ pdf 1.3 MB ] Dec 2018
Security Analysis GZ13 Otago [ pdf 1005.29 KB ] Dec 2018
Security Analysis GZ14 Southland [ pdf 817.64 KB ] Dec 2018
Part E Date
Frequency Principal Performance Obligations [ pdf 537.99 KB ] Dec 2018
Part F Date
Dry Year Operational Issues [ pdf 1.3 MB ] Aug 2019
Part G Date
Resources (Maps, Site Codes, SLDs etc) [ pdf 1.59 MB ] Dec 2018
Part H Date
Consultation Outcomes [ pdf 693.39 KB ] Dec 2018

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