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Annual Report 2015

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Trends of technological disturbances

Trends of technological disturbances
Indicators 2011 2012 2013 2014 2015 Variance in 2015/2014,%
Per unit accident rate 6.79 11.43 13.05 9.82 6.77 –31.0
Electricity undersupply, thousand kWh 2,344.8 2,456.9 6,337.6 5,249.18 3,240.38 –38.3
Electricity interruption, hours 11,977.3 104,666.9 76,534.4 27,894.03 26,229.13 –6.0
Financial damage, RUB thousand 48,313.2 46,679.0 70,367.2 67,514.24 59,071.89 –12.5

Based on the analysis of technological disturbances in 6kV or higher voltage grids of PJSC IDGC of the North-West in the reporting period, overall improvement of reliability was observed in 2015 as compared to 2014.

Most technological disturbances in 2015 were caused by exposure to recurring disasters (47%), trees falling on HVLs (23%) and worn-out (broken) insulation (14%).