INDEPENDENT POWER PLANT (4X600MW) Vedanta Limited, Jharsuguda (Odisha)

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1 First Prize Thermal Power Stations (Coal Fired Plants > 100 MW Capacity) INDEPENDENT POWER PLANT (4X600MW) Vedanta Limited, Jharsuguda (Odisha) Unit Profile Vedanta Ltd. power operations include a 2,400 MW. It is an Independent Power Plant with 4X600MW unit configuration. Boiler is a subcritical reheat, single furnace, single reheat forced circulation, balance draft, dry bottom, suspension type coal fired boiler. The furnace is tangential firing type with one layer of light oil gun and three layers of heavy oil guns in every corners of boiler. The boiler is designed to produce 2028 tons/hour steam at 17.5 MPa pressure and 541deg.C at MCR capacity with coal having high heating value of 3300 kcal/kg. The turbine type is: sub-critical, primary reheat.single shaft.three cylinder and four-flow, and condensing type and its design rated power is 600MW,which characteristics include: Combination of the HP& IP cylinder, double-flow reverse arrangement of the LP cylinder. Plant is equipped with state of art Hybrid ESP(ESP with Bag filter) to reduce the emission level below 50mg/NM 3.High concentrated slurry discharge system(hcsd) installed to reduce water consumption as well as optimum use of resources for ash storage. 477

2 Salient Features of Independent Power Plant Sl. No. Features Details 1 Capacity 2400 MW 2 Configuration 4 x 600 MW 3 Type of boilers Pulverized coal fired boilers 4 Power evacuation Power transmission through 400 KV lines to National & State grid 5 Fuel Coal 6 Source of Coal Mahanadi Coal Fields (45-km from proposed site) 7 Coal Requirement 14 Million MT 8 Sulphur content 0.3 to 0.5 % (Max) 9 Ash Content in Coal 41.6 % (Max) 10 Ash generation TPD (Based on 100% PLF) 11 ESP efficiency 99.95% 12 Stack Two twin Flue stacks of 275-m height 13 Water Requirement 6146 m3/hr. from Hirakud & Source Plant Operating Parameters Sl Operating Parameter UOM F.Y F.Y F.Y F.Y Plant Loading Factor % 44% 40% 40% 39% 2 Availability % 64% 60% 58% 56% 3 Utilisation % 69% 66% 69% 70% 4 Aux Power % 10.45% 9.89% 8.55% 8.08% 5 Station Heat Rate Kcal/kWh Specific 3000 GCV gms/kwh Specific Oil Consumption ml/kwh

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4 Energy Efficiency Projects Achievement of Annual energy savings in Year of Project Description Electricity Fuels* Investment Commis- (Lacs Coal F.Oil Gas Total Total incurred sioning kwh) (ton (kl) (Lac fuel savings on the of the nes) Nm 3 ) (MTOE) (Rs. project projects Lacs) (Rs.Lacs) CW P/P modification- Speed reduction by increasing the no. of poles from 16 to 18 Loading reduce on ID Fan by replacing APH seal with soft seal Replacement of FF bags to reduce ID Fan loading CEP modification by De-staging Stopping of One CW pump Arresting of air leakage PA header. Power saving in Mills by decreasing the no of balls. FY Retrofitting of VFD in Bottom ash slurry pump Stopping of DP transfer pump (taking hot-well makeup through vacuum) Vacuum pump running hours optimization During unit Start-up use TDBFP instead of MDBFP installation of dozing line in DP pump to boiler filling line Mill Optimization on part loads Running Optimization of service water pump stopping of 2 compressor Geho pump running hour reduction Belt utilization for bunkering from 37% to 58% Isolation of standby cooler of OCCW Saturated steam washing of Unit#1 turbine deposits Optimization of Excess Oxygen by defined oxygen control limits near to 3% Furnace Cleaning-Optimization in Soot Blowing operation SH & RH spray auto loop tuning

5 SADC controlling for control the drift and RH steam temperature on higher side. Monitoring of losses impacting on Heat rate and corrective action Boiler modification Re-heater temperature improvement Condenser performance improvement methods. Turbine offline washing in Unit#2 Reduction in Un-burnt carbon% DM make up reduction CBD flash tank optimal usage Charging of auxiliary header with ext-4 when unit load is greater than 400MW Start-up time reduction Reduction in number of tripping Energy Policy 481