MARKETS

Ancillary services

Information based on provisional data as of January 2023

Mercados
Browse the content
Weight of the impact of ancillary services on the final priceCost of ancillary services in €MEnergy requirements covered by ancillary servicesAverage weighted prices of ancillary services of the peninsular electricity system

The impact of adjustment services on the average final energy price was 7.70 €/MWh, higher than the 4.23 €/MWh of 2021. This increase was due to the high prices recorded in all markets. A comparison of the share of this service in the final average price shows a slight increase in this year's price (3.8 % compared to 3.6 % the previous year).

In December 2022, ancillary services accounted for 8.7 % of the average final energy price, as more energy was scheduled due to restrictions in that month.

Weight of the impact of ancillary services on the final price

Chart

Combination chart with 2 data series.
The chart has 1 X axis displaying categories.
The chart has 1 Y axis displaying €/MWh. Range: 0 to 12.
Source: ree.es
End of interactive chart.
Access REData for more monthly information

In 2022, the cost of ancillary services was 1,833 million euros, 78.8 % higher than in the previous year.

Cost of ancillary services in €M

€/MWh€

Chart

Line chart with 2 lines.
20212022Restrictions PDBF444473Real time restrictions281631Technical restrictions7251,105Banda259577Deviations114193Others*-58-31Power factor control-15-12Total Ancillary services1,0251,833%2022/202178.8
The chart has 1 X axis displaying categories.
The chart has 1 Y axis displaying values. Range: -500 to 2000.
20212022
Restrictions PDBF444473
Real time restrictions281631
Technical restrictions7251,105
Banda259577
Deviations114193
Others*-58-31
Power factor control-15-12
Total Ancillary services1,0251,833
%2022/202178.8
End of interactive chart.

Other: Includes non-fulfilment of balancing energy, deviation balancing, and deviations between systems.
Access REData for more general information

The energy needs managed through ancillary services were 3.1 % lower than in 2021. Energy scheduled for security reasons was 20.2 % lower, due to the decrease in energy caused by technical constraints on the PDBF (27.2 %), while real-time technical constraints increased by 3.6 %. The balancing energy used has increased by 14.1 %, mainly as a result of the increase in secondary regulation energy and replacement reserves.

The energy volume due to technical restrictions to the PDBF represents 29.2 % of the total ancillary services, lower than the 38.9 % it represented last year and far from the 51 % of 2020.

Energy requirements covered by ancillary services

GWh

Chart

Line chart with 6 lines.
Upward energy 2021Downward energy 2021Upward energy 2022Downward energy 2022Upward energy %22/21Downward energy %22/21Energy scheduled for security reasons9,4759126,2192,066-34.4126.5Technical restrictions PDBF7,7892534,5311,325-41.8423.3Real time restrictions1,6866591,6887410.112.5Balancing energy used5,8244,4806,3895,3699.719.8Reservas de sustitución (RR)2,1688522,3881,35010.158.5Secondary control1,3001,5411,3352,1522.739.7Tertiary control2,1601,3222,2801,5205.614.9IGCC19776538634796.0-55.0Total energy managed15,2995,39212,6077,435-17.637.9
The chart has 1 X axis displaying categories.
The chart has 1 Y axis displaying values. Range: -2500 to 17500.
Upward energy 2021Downward energy 2021Upward energy 2022Downward energy 2022Upward energy %22/21Downward energy %22/21
Energy scheduled for security reasons9,4759126,2192,066-34.4126.5
Technical restrictions PDBF7,7892534,5311,325-41.8423.3
Real time restrictions1,6866591,6887410.112.5
Balancing energy used5,8244,4806,3895,3699.719.8
Reservas de sustitución (RR)2,1688522,3881,35010.158.5
Secondary control1,3001,5411,3352,1522.739.7
Tertiary control2,1601,3222,2801,5205.614.9
IGCC19776538634796.0-55.0
Total energy managed15,2995,39212,6077,435-17.637.9
End of interactive chart.

Chart

Bar chart with 4 data series.
The chart has 1 X axis displaying categories.
The chart has 1 Y axis displaying GWh. Range: -1500 to 2000.
Source: ree.es
End of interactive chart.
Access REData for more general information on energy scheduled for security reasons

The weighted average prices of the ancillary services of the peninsular system have resulted as follows:

Average weighted prices of ancillary services of the peninsular electricity system

€/MWh

Chart

Line chart with 6 lines.
Upward energy 2021Downward energy 2021Upward energy 2022Downward energy 2022Upward energy % 22/21Downward energy % 22/21Technical restrictions PDBF1468923614761.465.0Real time technical restrictions269505225993.818.4Secondary control11210118611966.218.7Tertiary control137592309467.558.9Replacement Reserve144702188750.824.0
The chart has 1 X axis displaying categories.
The chart has 1 Y axis displaying values. Range: 0 to 600.
Upward energy 2021Downward energy 2021Upward energy 2022Downward energy 2022Upward energy % 22/21Downward energy % 22/21
Technical restrictions PDBF1468923614761.465.0
Real time technical restrictions269505225993.818.4
Secondary control11210118611966.218.7
Tertiary control137592309467.558.9
Replacement Reserve144702188750.824.0
End of interactive chart.

Replacement reserves: The RR-type balancing energy service has a single price. The value represented in the table corresponds to the weighted average price according to the direction needed by the Spanish Electricity System.
Access REData for more general information on PDBF and real time prices

Related contents

About ENTSO-E

Visit this European Network of Transmission System Operators for Electricity.

Go to the website
Energy, in the world

The International Energy Agency works with countries around the world to design energy policies for a secure and sustainable future.

Find them out
About renewables and energy transition

The International Renewable Energy Agency (IRENA) publishes extensive information on the global acceptance of renewable energy.

Go to the website
Renewables, up to date

Stay informed of the latest events in the renewable energy sector through the Association of Renewable Energy Companies (APPA).

Go to the publication
Visit CNMC website

Find information of interest on Comisión Nacional de los Mercados y la Competencia.

Go to the website
Visit MITERD website

Find information of interest on Ministerio para la Transición Ecológica y el Reto Demográfico.

Go to the website