The main grid was built over several decades. The equipment in use consists of very different devices and structures of various ages, and every item needs to be kept in working order throughout its life cycle. Long-term maintenance will help to ensure a high transmission reliability rate from one generation to the next.
Regular system testing and practical exercises with various parties ensure that Fingrid is ready to respond to a crisis. For example, communication is paramount in the event of a major operational disturbance.
Antti Puuska, who began working at Fingrid’s predecessor, Imatran Voima, in 1976, discusses how substation construction has changed over the last decades.
Hoar frost sticks to the earth wires of transmission lines and presses them onto the phase conductors. The consequence is an earth fault, which de-energises the transmission line. If there is a very large amount of ice load, the tower structures or earth wires could break.
The key personnel in charge of contingency planning in Finland and Sweden attended a course Hanaholmen to consider and practise effective ways of combatting and resolving civil crises.
The energy revolution requires the main grid and the entire energy system to be prepared for the fluctuations in generation output caused by renewable forms of energy. Batteries offer the possibility of the quick and accurate balancing of generation and consumption.
According to Fingrid’s annual customer satisfaction survey, customers continue to consider our work to be good, and, in the main, the results have remained largely the same as in the preceding year.
One of the most important substations in the electricity system of Finland – Fingrid’s Rauma substation – will be refurbished.
Fingrid is raising the fee for electricity transmission in the main grid by an average of two per cent in 2022.
Big changes are ahead for the processes and information systems in the Main Grid Control Centre, but system security must be maintained. To address this challenge, a situational awareness system was put into trial operation in the summer. The system means Fingrid’s customers will receive even better service and a faster response in the event of problems.
