The reliability of the electricity and district heating networks is at a record level in Helsinki. Last year, the average power cut lasted 1.2 minutes per Helsinki resident. The excellent reliability rate is the highest in Europe. In the district heating network, the number of leaks in 2020 was also record low. Long-term development of distribution networks is now reaping benefits.
Maintained by Helen Electricity Network Ltd, the electricity network of Helsinki has smashed the reliability records also before: the previous European record, 1.5 minutes, is from 2019. Last year, the company reached a new record, 1.2 minutes. This level means that a Helsinki resident has a power cut of half an hour once every 25 years.
Excellent reliability in electricity distribution is the result of goal-oriented work carried out over the years. The ageing electricity network has been replaced each year in a systematic way, which alone keeps the number of faults down in the electricity network. In addition, in the 2010s Helen has invested in automatic fault management devices for handling faults in the underground electric cables without the customers noticing anything. Another major reason for the improvement of reliability is adding automation to the electricity network. With automation, any faults that may cause power cuts are quickly found and isolated from the rest of the network, and the electricity can be restored to the customers via another route.
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Photo: Helen