What if the electricity was cut off for a couple of weeks because of exceptional weather conditions? What would happen to the flow of information if normal communication devices didn’t work? Where would citizens get heat and water and how would we secure fuel distribution? These threats were the starting points for the large Jäätyvä (dealing with a widespread power outage caused by freezing weather) exercise held in Kuopio in October.
Fingrid and Teollisuuden Voima (TVO) have begun preparations to connect Olkiluoto 3 to the main grid. The connection will require special arrangements because, once completed, Olkiluoto 3 will be considerably larger than earlier electricity production units.
“When our help was requested, we agreed and arrived at the transmission line’s disconnectors in no time. We managed to limit and earth the fault quickly,” Kenet Oy’s Operations Manager Veli-Pekka Kinnunen and Substation Engineer Risto Ekdahl recall the disturbance that occurred in January. Fingrid thanked the men for the good and well-functioning cooperation.
Demand response is an effective way to prepare for exceptional situations in the electricity grid. It supplements production response in disturbance situations. Fingrid has acquired a record amount of frequency-controlled disturbance reserve from demand response for 2017.
Fingrid wanted to improve the availability and reliability of HVDC interconnections to a level that matched the importance of these cross-border connections. Major improvements in 2016 cut the number of outages ‘due to disturbances’ in half and reduced their duration to less than one-tenth of the average in previous years. How did Fingrid achieve such a fine outcome?