Annual report 2010

16. Energy Efficiency and Energy SavingPrincipal measures contributing to the reductionof electricity losses in the distribution processinclude the disconnection of transformers at two-(or more) transformer substations (220)110/35/10;110(35)/10 kV in the low-load mode; the disconnectionof transformers at 10/0.4 kV packagetransformer substations with a seasonal load; theleveling of 0.4 kV phase loads through the relocationof connected customers; the widening of thesection of 10 and 0.4 kV overloaded distributionlines; the replacement of overloaded and underloadedpower transformers; the optimization ofload and operational modes of electricity distributiongrids.Principal Measures to Reduce Electricity Network Losses in 2010MeasuresReduction in Losses, million kWhReplacing distribution line wires 24.58Replacing overloaded/underloaded transformers 17.72Switching off transformers at 2-transformer substations and at seasonallyloaded substations180.82Equalizing phase loads in 0.4 kV networks 14.14Optimizing loads of substations and line disconnection points by means ofswitch operation in main networks6.27Regulating reactive power at distribution grid centers 4.11In 2010, the scope of new energy conservationequipment commissioning was as follows:Commissioning of Energy Conservation Equipment in 201035-220 kV Substations 0.4-20 kV Transformer Substations High-Voltage Lines / Cable LinesMVA RUB in millions MVA RUB in millions km RUB in millions2,988.6 19,940.1 931.3 6,752.7 4,930.3 12,135.4159