Idd part 1 Interfaces with bsc parties and their Agents




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4.7.5.8 TSDF – Transmission System Demand Forecast


This message contains the Transmission System Demand Forecast values for every half hour period from the start of the current day to the furthest ahead forecast that has so far been received by the BMRA.

Every time an updated forecast is received from the System Operator, BMRA publishes the data in this message and additionally includes previously received forecast values from period 1 of the current day onwards. The Publishing Time field is therefore applicable to each period in the forecast and indicates the time that data for a particular period was last received and the data reported is always that most recently received for each period. The records in the message are ordered by Settlement Date and Period.

National Grid cannot provide Demand values for Interconnectors and pumped storage (Transmission System Demand forecast) for the 09:00am hour forecast. Therefore National Grid estimates these values or enters them as a ‘zero’ value.

Message Definition

The following table lists the fields that are required in the message.



Field

Field Type

Description of field

Zone Indicator

ZI

The zone that this forecast applies to.

A-EB1-B17 for zonal data, N for national data.



Number of Records

NR

This field indicates how many times the next FOUR fields appear in the message.

Publishing Date

TP

The time that this element of the forecast was originally published by the System Operator . It is included so users can see which forecast this value comes from, and therefore which weather forecast the value was based upon.

Settlement Date

SD

The settlement date.

Settlement Period

SP

The settlement period.

Demand

VD

The Demand in MW.

Message Subject Name

BMRA.SYSTEM.TSDF.c

(where c is ‘N’, or ‘A’ B1’ to ‘E’ B17’ and indicates whether the forecast is National or Regional)

4.7.5.9 MELNGC - Indicated Margin


This message contains margin forecast values for every half hour period from the start of the current day to the furthest ahead forecast that has so far been received by the BMRA.

Every time an updated forecast is received from the System Operator , BMRA publishes the data in this message and additionally includes previously received forecast values from period 1 of the current day onwards. The Publishing Time field is therefore applicable to each period in the forecast and indicates the time that data for a particular period was last received and the data reported is always that most recently received for each period. The records in the message are ordered by Settlement Date and Period.



Message Definition

The following table lists the fields that are required in the message.



Field

Field Type

Description of field

Zone Indicator

ZI

The zone that this forecast applies to.

A-EB1-B17 for zonal data, N for national data.



Number of Records

NR

This field indicates how many times the next FOUR fields appear in the flow.

Publishing Date

TP

The time that this element of the forecast was originally published by the System Operator . It is included so users can see which forecast this value comes from, and therefore which weather forecast the value was based upon.

Settlement Date

SD

The settlement date.

Settlement Period

SP

The settlement period.

Indicated Margin

VM

The indicated margin in MW.

Message Subject Name

BMRA.SYSTEM.MELNGC.c

(where c is ‘N’, or ‘A’ B1’ to ‘B17E’ and indicates whether the forecast is National or Regional)

4.7.5.10 IMBALNGC - Indicated Imbalance


This message contains imbalance forecast values for every half hour period from the start of the current day to the furthest ahead forecast that has so far been received by the BMRA.

Every time an updated forecast is received from the System Operator , BMRA publishes the data in this message and additionally includes previously received forecast values from period 1 of the current day onwards. The Publishing Time field is therefore applicable to each period in the forecast and indicates the time that data for a particular period was last received and the data reported is always that most recently received for each period. The records in the message are ordered by Settlement Date and Period.



Message Definition

The following table lists the fields that are required in the message.



Field

Field Type

Description of field

Zone Indicator

ZI

The zone that this forecast applies to.

B1-B17 A-E for zonal data, N for national data.



Number of Records

NR

This field will indicate how many times the next FOUR fields appear in the flow.

Publishing Date

TP

The time that this element of the forecast was originally published by the System Operator . It is included so users can see which forecast this value comes from, and therefore which weather forecast the value was based upon.

Settlement Date

SD

The settlement date.

Settlement Period

SP

The settlement period.

Indicated Imbalance

VI

The indicated imbalance in MW.

Message Subject Name

BMRA.SYSTEM.IMBALNGC.c

(where c is ‘N’, or ‘B1A’ to ‘B17E’ and indicates whether the forecast is National or Regional)

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