User Requirements Specification: Non Half Hourly Data Aggregation

This document describes the requirements for a system to aggregate consumption for non half hourly Metering Systems and to pass the results to the SVAA (ISRA) system.

This document describes the requirements for a system that will aggregate the estimates of annual consumption (EACs and AAs) for non-half hourly meters and pass the aggregated figures through to the ISR Agency Systems to enable Initial Settlement between Suppliers and Generators (within the pre-1998 settlement timescales) and subsequent Reconciliations between Suppliers to be performed.

This process comprises the Non Half Hourly Data Aggregation (NHHDA) system, which could be run by individual Non Half Hourly (NHH) Data Aggregators for a number of Suppliers in each GSP Group. The NHHDA system must work within the defined context of the Trading Arrangements (TA) for the 1998 market, and therefore this specification includes details of the interfaces between it and the other systems in the TA. The principles and structure of the TA for the 1998 market are described in detail in the 1998 Operational Framework (reference 1).