Rule Change: Open

Overview

This rule change request proposes changes to the National electricity rules (NER) to improve frequency control and system security in the National electricity system.
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This rule change request proposes changes to the National electricity rules (NER) to improve frequency control and system security in the National electricity system. The proposed changes to the NER include that: 

  • Scheduled and semi-scheduled generators be required to help control frequency outside of a narrow frequency response band close to 50Hz. 
  • a generator that changes its power output to help control system frequency is not considered as failing to comply with its dispatch instructions. 
  • clarification that, in addition to maintaining system security, AEMO is responsible for improving system security, consistent with the National Electricity Law (NEL) 
  • the clauses in the NER that relate to inertia and inertia support services be revised to better accommodate new technologies that help control frequency, such as fast frequency response from inverter connected plant 

Related rule change requests

This rule change request is one of three rule change requests that the AEMC has received in relation to primary frequency response and frequency control in the national electricity system.

The other related rule change requests are:
•    ERC0263 – Removal of disincentives to primary frequency response
•    ERC0274 – Mandatory primary frequency response

Consultation paper

On 19 September the AEMC published a consultation paper seeking stakeholder feedback on the proposal. 
This consultation paper addresses the issues raised in all three of the rule change requests relating to primary frequency response.

Submissions on the consultation paper are due by 31 October 2019.

Background

On 30 May 2019, Dr. Peter Sokolowski submitted a rule change request to the AEMC seeking changes to the NER to improve the control of frequency within the NEM. Dr Sokolowski is a research fellow in the school of electrical and biomedical engineering at RMIT University. He submitted this rule change as a private individual.
 

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Documentation

INITIATION

AEMC documents

Proposal Documents