This exchange information is a follow-up to exchange information No. 18/2012 - Implementation of Load Frequency Control in the Nordic synchronous system and No. 12/2013 – Update on implementation of Load Frequency Control in the Nordic synchronous system.
The implementation of automatic Frequency Restoration Reserves (FRR-A) in the Nordic power system started in December 2012 and all four Nordic transmission system operators currently contribute with FRR-A. The base FRR-A volume during the test period in the Nordic synchronous system is 100 MW. During week 10 to 17 tests have been performed with a capacity in the range of 100 to 400 MW.
The Nordic transmission system operators observe that currently in some parts of the Nordic system the FRR-A capability (number and capacity of units that are able to provide FRR-A) is limited and that the available FRR-A capacity is reduced due to the seasonal ‘spring flood’ conditions. Taking into account the required geographical distribution this would result in a limited total amount of available Nordic FRR-A, which would only have a limited effect on the frequency quality. The TSOs therefore decided to reduce the contracted FRR-A capacity for the period from 20 May to 16 September 2013 to 0 MW.
The Nordic transmission system operators will focus on building further capability and preparing for continuation of use of FRR-A in autumn 2013.
Lysaker, 20 May 2013
For further information, please contact:
Karolina Näsholm, Svenska Kraftnät, +46 8 4758201
Gunnar Nilssen, Statnett, +47 23903238
Anders Lundberg, Fingrid, +358 30 3954171
Kaj Christensen, Energinet.dk, +45 76224203