aFRR, automatic Frequency Restoration Reserves, DK1

Automatic Frequency Restoration Reserves, amounts and prices in Western Denmark.

aFRR, also called secondary reserve, is an automatic 15-minute power control. Previously it was called Load Frequency Control (LFC). The reserve is active over virtually the entire operat-ing day and fulfills three functions. It releases activated FCR, it deals with minor imbalances that are too small for regulating power activation, and it restores the agreed balance towards Germany. In addition, activation of aFRR differs from FCR in that it is not triggered directly by frequency fluctuations at the individual plants. It is activated through an automatic control signal sent from Energinet via the balance responsible party.

Today, all aFRR for DK1 is under normal circumstances delivered over Skagerrak 4. The current agreement with Norway on purchases of aFRR and FCR to West Denmark expire in 2019. For further info, please see “Introduktion til systemydelser” on www.energinet.dk


Hour UTC

Description

A date and time (interval), shown in UTC time zone, where the values are valid. 00:00 o\u2019clock is the first hour of a given day interval 00:00 - 00:59 and 01:00 covers the second hour (interval) of the day and so forth. Please note: The naming is based on the length of the interval of the finest grain of the resolution.

Comment

Please note that the format shown in the example applies to data download as JSON, XML or fetched through the API and is in accordance with the ISO 8601 standard. The format is slightly different when it is shown on screen or downloaded manually as CSV or XLSX. This is mainly due to readability and consideration for Excel users.

In preview (in the GUI) all timestamps are shown as (display convention) YYYY-MM-DD hh:mmZ e.g. 2017-07-14 08:00Z. The Z will remind viewers that this is UTC.

In download (CSV and XLSX) the date time are exported as YYYY-MM-DD hh:mm e.g. 2017-07-14 08:00. That is without the \u201cT\u201d and the \u201cZ\u201d and the seconds. Excel will recognize it as date-time. The user must remember the convention about time zones.

In download (JSON and XML) the full format is used YYYY-MM-DDThh:mmZ e.g. 2017-07-14T08:00Z.

Name

HourUTC

Type

datetime

Unit
Size

17

Example

2017-07-14T08:00Z

Format
Property constraint
Validation rules

Always full hours, i.e. minutes are 00

Hour DK

Description

A date and time (interval), shown in Danish time zone, where the values are valid. 00:00 o\u2019clock is the first hour of a given day, interval 00:00 - 00:59, and 01:00 covers the second hour period (interval) of the day and so forth.

Comment

On one normal day there will be 24 intervals.

When daylight saving times shifts there will be either 23 or 25 intervals.

Please note that the format shown in the example applies to data download as JSON, XML or fetched through the API and is in accordance with the ISO 8601 standard. The format is slightly different when it is shown on screen or downloaded manually as CSV or XLSX. This is mainly due to readability and consideration for Excel users.

In preview (in the GUI) all timestamps are shown as (display convention) YYYY-MM-DD hh:mm e.g. 2017-07-14 08:00. Please note that is no time zone indicator, showning that this is local (Danish) time.

In download (CSV and XLSX) the date time are exported as YYYY-MM-DD hh:mm e.g. 2017-07-14 08:00. That is without the \u201cT\u201d and the seconds. Excel will recognize it as date-time. The user must remember that this is local (Danish) time.

In download (JSON and XML) the format used is YYYY-MM-DDThh:mm e.g. 2017-07-14T08:00.

Name

HourDK

Type

datetime

Unit
Size

17

Example

2017-07-14T08:00

Format
Property constraint
Validation rules

Always full hours, i.e. minutes are 00

aFRR Downward regulation activated

Description

Activated aFRR downward regulation.

Comment

MWh/h is the average delivered MW, and for one hour approximately equals the energy measured in MWh.

Name

aFRR_DownActivated

Type

number

Unit

MWh per hour

Size

9.1

Example

543,45

Format

([0-9]*[,])[0-9]

Property constraint
Validation rules

=0

aFRR Downward regulation price (DKK)

Description

The energy price of activated automatic downward regulation (aFRR) to restore system frequency to the nominal frequency

Comment

Down regulation is settled with the DK1 spot market price - DKK 100 / MWh, where the maximum price is identical to the regulating power price for down regulation.

Name

aFRR_DownPriceDKK

Type

number

Unit

DKK per MWh/h

Size

9.2

Example

543,45

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

aFRR Downward regulation price (EUR)

Description

The energy price of activated automatic downward regulation (aFRR) to restore system frequency to the nominal frequency

Comment

Down regulation is settled with the DK1 spot market price - DKK 100 / MWh, where the maximum price is identical to the regulating power price for down regulation.

Name

aFRR_DownPriceEUR

Type

number

Unit

EUR per MWh/h

Size

9.2

Example

543,45

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

aFRR Upward regulation activated

Description

Activated aFRR upward regulation.

Comment

MWh/h is the average delivered MW, and for one hour approximately equals the energy measured in MWh.

Name

aFRR_UpActivated

Type

number

Unit

MWh per hour

Size

9.2

Example

184.3

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

aFRR Upward regulation price (DKK)

Description

The energy price of activated automatic upward regulation (aFRR) to restore system frequency to the nominal frequency

Comment

Up-regulation is settled with the DK1 spot market price +100 DKK / MWh, where the minimum price is identical to the regulating power price for up-regulation.

Name

aFRR_UpPriceDKK

Type

number

Unit

DKK per MWh/h

Size

9.2

Example

543,45

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

aFRR Upward regulation price (EUR)

Description

The energy price of activated automatic upward regulation (aFRR) to restore system frequency to the nominal frequency

Comment

Up-regulation is settled with the DK1 spot market price +100 DKK / MWh, where the minimum price is identical to the regulating power price for up-regulation.

Name

aFRR_UpPriceEUR

Type

number

Unit

EUR per MWh/h

Size

9.2

Example

543,45

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules