Rule Changes: Open

Generating System Model Guidelines

Reference:
ERC0219
Stage:
Consultation on Draft Determination
Proponents:
AEMO
Project Leader:
Istvan Szabo
Date initiated:
15-Mar-2017
Overview

On 20 June 2017 the Australian Energy Market Commission (AEMC) made a draft rule that clarifies the scope and level of detail of model data that registered participants are required to submit to the Australian Energy Market Operator (AEMO) and network service providers.

On 20 June 2017 the Australian Energy Market Commission (AEMC) made a draft rule that clarifies the scope and level of detail of model data that registered participants are required to submit to the Australian Energy Market Operator (AEMO) and network service providers.

Model data is a mathematical representation of the operation of power system equipment, such as generators or network assets connected to the grid. They form inputs into power system studies, which are used by parties including AEMO, generators and network service providers to examine how the power system will function under different conditions. These studies then inform how AEMO operates the power system and how generators are connected.

Various changes in power system conditions are making it more difficult for various parties to undertake accurate power system studies, particularly decreases in system strength in many parts of the grid. As system strength reduces, the interactions between grid connected equipment become more complex. This means that simpler kinds of model data used in power system studies may no longer reflect these interactions accurately. In order for power system studies to remain accurate and effective, more detailed model data inputs may be required to accurately reflect the behaviour of grid connected equipment.

This draft rule is therefore designed to provide various parties with access to the detailed model data that is needed to support effective power system studies in a changed power system environment.

The draft rule amends the existing frameworks in the National Electricity Rules (NER) to clarify the circumstances and conditions under which parties must provide model data to AEMO and where relevant, network service providers. The draft rule requires AEMO to set out, in the model guidelines and data sheets, the technical and operational details of what model data will be required by participants and the specific circumstances or conditions under which that model data will be required.

The draft rule also sets out principles that AEMO must consider when it develops the guidelines and data sheets, including having regard to the costs faced by participants in providing model data and the protection of confidential model information.

Submissions to the draft rule determination are due by 1 August 2017.

Background

On 31 October 2016 the AEMC received a rule change request from AEMO in relation to the provision of modelling data.

A key aspect of AEMO’s proposed rule was the introduction of a specific obligation on generators to provide AEMO with model data required to perform specialised electromagnetic simulation analysis. The proposed rule specified that this data would be provided in circumstances such as where a generator was connected through power electronic interfaced technologies.

AEMO also proposed to be able to request this data from any generator in those situations where, in AEMO’s reasonable opinion, the generating system would adversely affect other network users, power system security, or quality or reliability of supply of the power system.

On 15 March 2017 the AEMC published a consultation paper on the rule change request. 13 submissions were received to the Consultation paper. This draft determination is informed by these stakeholder submissions.

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