The Authority is proposing to change the requirements for how participants provide extended reserve in the North Island using AUFLS.

AUFLS are the blocks of load that are automatically disconnected during large under-frequency events in the electrical system. Although AUFLS is currently the only type of extended reserve product used in New Zealand, the Authority has adopted the generic term – extended reserve – to not limit the future introduction of other products and services.

The Authority expects the proposed revised Extended Reserve scheme to deliver a more flexible and resilient electricity system for consumers by reducing the likelihood of New Zealand-wide black-outs.

Overview

Date Activity
16 Nov 2021 Development: Following the system operator’s consultation on the ATR, the Authority has approved the final version of the AUFLS Technical Requirements (ATR). Read more
17 Aug 2021 Development: The Authority has decided to amend the Code to enable the transition of the automatic under-frequency load shedding provision in the North Island to the system operator’s proposed 4-block scheme. Read more
29 – 29 Apr 2021 Implementation: On 29 April 2021 the Authority held and engagement session for the extended reserve Code amendment consultation. Read more
13 Apr – 11 May 2021 Consultation: The Authority is consulting on amending the extended reserve Code obligations. Read more
17 Nov 2020 Development: The Authority is developing a Code amendment proposal to revoke the Efficient Procurement of Extended Reserve obligations and introduce the 4-block AUFLS obligations. Read more
17 Apr 2020 Implementation: Read more
14 Jan 2020 Implementation: Draft data specification for historical AUFLS demand data Read more
15 Oct 2019 Background: How extended reserve works Read more
15 Oct 2019 Development: Focus of Extended Reserve project refined Read more
15 Oct 2019 Development: Frequently asked questions Read more
15 Oct 2019 Implementation: Initial phase of implementation Read more