Gas Supply Hub

This chapter provides an overview of the IT systems in the Gas Supply Hub Gas Trading Exchange (GSH Gas Supply Hub. An exchange for the wholesale trading of natural gas.). It is relevant to IT decision making during participant onboarding and provides an understanding of what is required to interface with AEMO Australian Energy Market Operator’s market systems.

About the GSH

The GSH consists of a trading exchange for the wholesale trading of natural gas. It also provides Settlement, Prudential, Delivery Quantity, and Reporting services to trading participants.

For more details, on AEMO's website, see:

  • About GSH, see Gas Supply Hub Guides.
  • About GSH registrable capacities, see Registration.
  • About software and guides, see Market Operations.

Participants must comply with the Gas Supply Hub Exchange Agreement See Relevant Rules or Procedures that sets out the terms of participation in the gas supply hub and the terms governing transactions entered into through the exchange. Applicants for membership in the exchange must sign an agreement with AEMO, agreeing to be bound by the exchange agreement.

GSH IT interfaces

Participants can use several interfaces to interact with GSH IT systems—file, web, and web services, see Table 14.

Table 14 GSH IT interfaces

Interface

Function

Web portal (HTTPS)

The GSH provides web portal interfaces to access the web applications in the GSH.

File upload to web portal (HTTPS)

The GSH allows direct uploading of files to the web portal interface or the participant file server.

File server (FTP)

Each participant ID has secure read and write access to folders for production and pre-production systems. These folders are for communication between participant IDs and AEMO.

AEMO provides a set of software applications called Data Interchange to assist participants with the replication of data to their DBMS. Successfully implementing and managing Data Interchange requires an experienced IT team, planning, networking, database management, batch file management, and disaster recovery.

Participants use the Data Interchange web applications in the EMMS web portal to:

  • Subscribe to receive files in their participant folder on the EMMS file server.
  • Monitor their Data Interchange, Data Delivery, and Data Sharing statuses.

Windows application

A locally installed trading application that connects to AEMO over MarketNet.

GSH IT systems

Table 15 summarises the applications available to participants in the GSH.

Table 15 GSH IT systems

IT system

Interface

Description

Trayport Exchange Trading System (ETS)

Windows application

The ETS allows trading participants to submit orders to buy or sell gas at the various trading locations within the gas supply hub. The ETS matches the orders and forms trades between participants.

GSH Delivered Quantity

Web portal
File upload

Used by trading participants to submit new delivered quantity data and confirm existing delivered quantity submissions. Participants can also provide AEMO with delivered quantity data by uploading a .csv file to the participant file server.

GSH Prudential Dashboard

Web portal

Provides participants with their latest prudential information. The dashboard shows exactly the same information that AEMO uses in its prudential assessments and provides participants with useful information about their accrued financial position with AEMO.

GSH Publishing Direct

Web portal

Provides participants with access to GSH reports and statements published by AEMO. Participants can subscribe to reports for automated delivery each time a new report is published.

GSH Reallocations

Web portal
File upload

Allows participants to create, submit, authorise, and view reallocation requests in accordance with the GSH Reallocation Procedure. At each settlement run, reallocation details are copied from the Reallocations system to the Settlements system. The Settlements system then includes this data in settlements calculations and incorporates the results in participants’ weekly settlement statements.

GSH participant categories

Table 16 describes the relevant functionalities used in GSH for each participant category.

Table 16 GSH functionalities used by each registrable capacity

Registrable capacity

ETS

DI

Delivered Quantity

Prudential Dashboard

Publishing Direct

Reallocations

Trading participant

C

C

C

C

C

 

Viewing Participant

C

 

 

 

C

 

Reallocation Participant

 

 

 

C

C

C

Available from AEMO's website.