Page 46 - Apraava Energy Report_01-73
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46     Energy in action






            Operational Efficiency in Renewable Energy



            Initiatives for maximising efficiency

               Solar assets                                 Wind assets


               Solar operational initiatives:               Wind operational initiatives:
               •  Construction of rain water harvesting     •  Generator water ingress prevention by drain sleeve retrofitting
                 structures and desilting of natural dam    •  Blade skirt internal sealing to prevent ingress into the nacelle
                 at Sakri
                                                            •  Lightning spikes retrofitted on 33 KV poles
               Solar operational initiatives under          •  Retrofitting of dual Lightening Arrestor (LA) in Vacuum Circuit Breaker
               execution:
                                                              (VCB) yard of the Wind Turbine Generators (WTG)
               •  Implementation of reactive power          •  Printed Circuit Board (PCB) varnishing in sites prone to extreme
                 compensator to limit reactive power          moist conditions
                 injection to the grid (to adhere to
                 regulations) & improve Power Factor        •  100% blade cleaning and repair activity at Khandke wind farm
                 (PF) at all solar assets
                                                            Completed wind operational initiatives/ those under execution:
               •  DC capacity augmentation at Sakri by
                 installing Photo Voltaic (PV) modules.     •  Vortex Generator (VG) strip installation to increase performance of
                 Land and inverter inputs in place            turbine by recovering aerodynamic performance of blades lost due to
                                                              erosion and dust accumulation
               •  Rain water harvesting wells initiated at
                 CREPL & DSPL sites                         •  Installation of power boost, which makes use of inherent design margin
                                                              to increase the rating of generator
                                                            •  Installation of Central Lubrication System (CLS) which is a new ‘parallel’
                                                              type, replacing existing single point lubricators to prevent  ‘under/over’
                                                              lubrication besides reducing the disposal of toxic metallic waste

                                                            •  Detection of dynamic pitch and yaw misalignment using lidar to correct
                                                              errors in measurement

                                                            •  High resolution wind measurement and direction sensor installation in
                                                              S97 (Suzlon) make turbines

                                                            •  Installation of fire protection system at Tejuva wind farms
                                                            •  Supervisory control and data acquisition (SCADA) upgrade at Hara wind
                                                              farm and new SCADA configuration at Theni & Khandke wind farms
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