Guides and useful information

Settlement Technical Guides

This page provides technical specifications, guides and other documentation related to settlement of the WEM.

WEM Settlement Formulation

The Prudential and Settlement System (PaSS) application is built on the basis of the independently certified WEM Metering, Settlement and Prudential Calculation formulation document.

This document creates a mathematically accurate representation of the ESM Rules, including:

  • Representation of Sets for use within the document;
  • Mathematical equation representation of the ESM Rules;
  • Specification for Variables used by the calculations;
  • Trading Margin calculation for Participants on a given day;
  • Settlement of the relevant market services;
  • Interest calculation for the Adjustment Process; and
  • Input estimation methodology for Prudentials.

Current versions

Other Settlement Formulations

Current versions

Settlement Statements and Invoices

This WEM Settlement Statement and Invoice Technical Guide provides general information about the formats of the Settlement Statements and Invoices produced by AEMO in accordance with the ESM Rules.

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