Annual report 2010

JSC IDGC Holding. Annual Report 201016.Energy Efficiencyand Energy SavingJSC IDGC Holding is among the principal pursuers of government policy in thefield of energy conservation. The distribution grid sector works to optimize thestructure of 0.4-20 kV electricity distribution grid and the resulting transition tooptimal load distribution in low-voltage networks.0.4 kV lines account for one-third of all overheaddistribution lines of JSC IDGC Holding. In the contextof difficulties in load management and controlin the household sector, the optimization of0.4-20 kV electricity distribution grid is an importantmethod for enhancing energy efficiency andenergy conservation. The drawbacks of managementand control in low-voltage networks even atthe existing load level leads to the growth of bothprocess and commercial losses in the electric gridof 0.4 kV. Commercial losses are primarily causedby a large quantity of low-voltage electric gridfacilities and their availability for unauthorizedelectricity demand. The lack of efficient low-voltagenetwork regulation also impedes building afully functional system of 0.4 kV electric gridtraceability and manageability. High accidentrate in the 0.4 kV electric grid as compared with ahigh-voltage electric grid leads to the simplificationof the reliability rate of electric power supplyto customers.The trend toward capacity growth at main substationsto meet growing capacity demand shouldgive the floor to an integrated approach towardbuilding networks with efficiently loaded at mainsubstations. The principal engineering solution tothis objective should be the abandonment oflong-distance electric network of 0.4 kV and thedevelopment of 10-20 kV network, including theoptimal siting (approaching) of pole-mountedthree-phase and single-phase transformers to thegroups of customers.156