Annual report 2010

JSC IDGC Holding. Annual Report 201015.2. Production Control, OccupationalSafety, and Process SafetyIncrease in reliability of electricity gridsIn 2010, work was performed to develop andimprove the system for recording process failuresin the electric grid sector pursuant to the resolutionadopted at the meeting of technical managersof the SDCs of JSC IDGC Holding. The followingrequirements were taken into account:— the Rules for Investigating into the Reasonsof Accidents in the Electricity Industry,approved by Resolution of the Government ofthe Russian Federation No. 846 of October28, 2009, in conformity with which allprocess failures in any network of 6 kV orabove are classified as accidents.— Guidelines for Calculating the Level ofReliability and Quality of Supplied Goods andRendered Serviced for Organizing theManagement of the Unified National (All-Russian) Electric Grid and Territorial GridOrganizations, approved by Order of theMinistry of Energy of the Russian FederationNo. 296 of June 29, 2010;— Instructions on the Investigation andRecording of Process Failures in the EnergySystems, Power Plants, Boiler Rooms, Electricand Heat Networks effective since January 1,2001 (to the extent hat it does not contradictthe Rules for Investigating into theReasons of Accidents in the ElectricityIndustry).As a result, the criteria for recording process failures(accidents) were expanded, causing significantgrowth of accident rates and the infeasibilityof comparative analysis against the previous fiscalperiods.The criterion for determining the reliability rate,based on the generally accepted internationalindicators and the Guidelines for Calculating theLevel of Reliability and Quality of Supplied Goodsis the duration of interruptions in power supply toservice consumers. The equivalent of the abovementionedindicator for the electric grid facilitiesof the subordinate grid organizations of JSC IDGCHolding is the System Indicator of the AverageDuration of Process Failures Related to Inter -rupted Electricity Supply for Consumers (for eadersof 6kV or above), which was 4.08 hours in 2010.Process FailuresBased on investigations into each process failure,IDGCs developed the following target programsfor raising the reliability rate of grid facilities:— engineering certification of electrical installations;— replacement of overloaded power transformerswith higher-capacity transformers;— replacement of porcelain suspended insulationof distribution lines with glass insulation;— replacement of oil circuit breakers with vacuumor SF circuit-breakers;— cleaning of the distribution line forest corridorand removal of trees growing beyond theforest corridor and threatening to fall downon the distribution line wires;— teleautomation of substations;— replacement of physically deteriorated andobsolent equipment and Relay Protectionand Automatic Equipment;140