Description : Prepare maintenance schedule of various actuators used in large wind power plants.
Last Answer : Maintenance Schedule of Various Actuators: Maintenance of Yaw System Actuator: The maintenance of Yaw system actuator is done quarterly or yearly. Following maintenance activities are to be ... , then send alarming signal. 7.Monitor change in temperature, pressure and mechanical stresses.
Description : State the factors which affect the nature of the wind close to the surface of the earth.
Last Answer : Factors Which Affect the Nature of the Wind Close to the Surface of the Earth: Horizontal pressure (gradient) Rotation of earth (coriolis force) Centripetal acceleration Frictional forces
Description : Identify the sensors for the following : i) Wind speed ii) RPM of generator shaft iii) Temperature in generator iv) Cable untwisting v) Vibration vi) Wind direction
Last Answer : i) Wind Speed : Anemometer. ii) RPM of Generator Shaft: Accelerometers. iii) Temperature in Generator: Thermistor, thermocouple, RTD. iv) Cable Untwisting : Cable Twisting sensor. v) Vibration : Accelerometer, piezoelectric. vi) Wind direction: Wind vane.
Description : Related to WPP define following wind speeds i) Cut in ii) Cut out iii) Survival iv) Threshold
Last Answer : i) Cut-in wind speed: This is the minimum wind speed at which the turbine blades overcome friction and begin to rotate. ii) Cut out speed: This is the speed at which the turbine ... this range, it is ensured that available energy is above the minimum threshold and structural health is maintained.
Description : Explain lift & drag wind energy conversion principle.
Last Answer : Two primary aerodynamic forces work in wind turbine rotors are:- 1) Lift which acts perpendicular to the direction of wind flow and 2) Drag acts parallel to wind flow. ... aero foil type blade offer better performance and higher rotational speed and make them ideal for power generation.
Description : Identify & explain any two difficulties faced while connecting WPP to the power grid.
Last Answer : Difficulties Faced while Connecting WPP to Power Grid: There are several technical issues associated with grid connected systems like power quality issues, power and voltage fluctuations, storage, protection ... that is out of phase with grid voltage and so provide power factor correction.
Description : Name any two power electronic components in SWT.
Last Answer : Power Electronic Components in SWT: Boost converter Buck converter Buck Boost converter Cuk converter Voltage Source Inverter Current Source Inverter
Description : Which of the following sources has the largest share in power generation in India? (1) Atomic power (2) Thermal power (3) Hydro power (4) Wind power
Last Answer : (2) Thermal power Explanation: As per the Union Ministry of Power, thermal power (coal, gas and oil) accounts for 68.2% of power generated in India (as of 31.01.2017). India's ... from all renewable energy sources is nearly 15% of the total electricity generation (utility and captive) in India.
Description : Draw a block diagram of WPP substation. State function of each block.
Last Answer : Block Diagram of WPP Substation: OR Wind Turbine : Converts wind power to rotational mechanical energy Gear Box: Transfer low speed to high. Generator: Converts rotational ... to DC and vice-versa of correct frequency. Transformer: Step up the voltage to grid level.
Description : Where can I find information on a wind power generation generator?
Last Answer : wind power generator dot com is a good place to go they have great information on everything you need to know about wind power, both private and public.
Description : Prepare preventive maintenance schedule for SWT related to i) Oiling and greasing ii) Electronic equipment iii) Towers
Last Answer : Preventive maintenance schedule for SWT: I. Oiling and greasing: 1) Checking geared motor oil, greasing, lubrication and maintenance of drive train. 2) Changing oil, belts, bearing lubrication. 3 ... tower. 3) Every 6 months inspection for loop condition, safety norms, tower surface.
Description : Explain with neat sketch working of direct drive SWT. Give any two advantages of it over geared type SWT.
Last Answer : Direct Drive SWT: This plant has no gear box. Turbine blades are very light weight made up of stiff carbon fibre material. Blades are flat shaped. Due to this shape, lift increases. ... needed is less 4. More reliable 5. Better performance 6. Light weight 7. Less maintenance
Description : Explain scheduled maintenance of Stall Pitch, Active Pitch controlled of WPP.
Last Answer : Scheduled Maintenance of Stall Pitch: In scheduled maintenance of stall pitch, following maintenance activities are performed quarterly or yearly basis: 1. Grease the cable, which pulls the blade ... battery. In case of power failure, batteries will ensure the movement of blade to safe position.
Description : Recommend & explain with neat sketch a suitable braking mechanism for the large WPP.
Last Answer : Braking Mechanism For The Large WPP: 1. Furling Mechanism: Furling allows the whole set of blades to change its position and blades turned away from wind, if wind speed is beyond safety limit. It ... 1.To harness optimum power from wind 2.To protect turbine in case of high wind speed.
Description : List any four mechanical and electrical faults in SWT.
Last Answer : Mechanical Faults in SWT: 1. Bearing and gearbox issue 2. Blade design , manufacturing, installation issue 3. Mechanical break down 4. Hydraulic failure 5. Nacelle ... failure, power regulator failure 12. Torque reversal due occasional connecting and disconnecting generator to grid
Description : Recommend with justification the generators used in SWT.
Last Answer : 1. Fixed Speed Induction Generator: This is squirrel cage induction generator for fixed speed. This is 1) reliable 2) self-starting 3) easy to adjust 4) have low maintenance. 2. ... optimizes use of given grid capacities 6) Better cooling performance 7) Reduced noise level of moving parts.
Description : Describe the general maintenance issues of the horizontal axis WPPs.
Last Answer : General Maintenance Issues of Horizontal Axis WPPs: 1. Gearbox failure. 2. Misalignment between generator and gearbox. 3. Problems related to lubrication. 4. Variation among the components by ... charging gear oil, brake pads, filters, bearings, sensors, actuators. 6. Bearing failure issue.
Description : Name any four main parts of SWT. Give function of each part.
Last Answer : Parts of SWT: 1. Rotor - It includes blades for converting wind energy to low speed rotational energy. 2. Gear box - It converts low speed rotational energy to high speed. 3. ... 5. Other Equipment: Control equipment, electric cables, hub, tale vane, sensors, anemometer to implement control.
Description : List various types of generators used in WPP.
Last Answer : Various Types of Generators Used in WPP: 1. Squirrel Cage Induction Generator ( SCIG ) 2. Wound Rotor Induction Generator ( WRIG ) 3. Doubly Fed Induction Generator ( DFIG ) 4. Wound Rotor synchronous Generator ( WRSG) 5. Permanent Magnet Synchronous Generator ( PMSG)
Description : List any four towers related to WPP. Explain any one in brief.
Last Answer : List of Towers Related to WPP: Tubular Steel / concrete Tower Lattice Tower Guyed Pole Tower Hybrid Tower 1. Tubular steel tower: Generally used for a large wind turbine and normally manufactured in ... type tower and thin, tall lattice type tower in the middle instead of single pole.
Description : Give the classification of SWT on any two factors.
Last Answer : Classification of SWT: According to axis of rotor 1. Horizontal axis wind turbine 2. Vertical axis wind turbine According to direction 1. Up wind 2. Down wind According to number of blades 1 ... 1. Constant speed 2. Variable speed According to drive 1. Direct Drive 2. Geared Drive
Description : Identify any two weekly maintenance activities for WPP.
Last Answer : Weekly Maintenance Activities: Routine checkup, monitoring, periodic reports. Blade cleaning. Higher voltage equipment maintenance. Turbines require periodic lubrication, oil changes. Bolt and electrical ... . Machine should be checked for corrosion. Check guy wire for proper tension.
Description : Name any two aerodynamic controls for WPP.
Last Answer : Aerodynamic Control for WPP: Pitch control Passive stall control Active stall control Yaw control
Description : List any two advantages of vertical axis WPPs.
Last Answer : Advantages of Vertical Axis WPPs: They can produce electricity in any wind direction. Low production cost as compared to horizontal axis wind turbine. Easy construction. Low maintenance ... weather conditions. Variable speed operation. Yaw and pitch control mechanism are not needed.
Description : Can you offer any home wind generation advice?
Last Answer : perhaps the solar living institute in mendocino has some info.
Description : Do you support energy generation via wind turbines?
Last Answer : answer:Yes, we had a question about this like a week ago. And Again my answer is: My house is running completely on wind power. (Awesome video, though)
Description : Singing of telephone wires in the wind occurs due to : (a) Vibrations caused by birds as they sit on or get off, the wires (b) Tensioning at the ends (c) Magnus effect (d) Generation of Karman Vortex street
Last Answer : (d) Generation of Karman Vortex street
Description : A 40 kW engine has a mechanical efficiency of 80 %. If the frictional power is assumed to be constant with load, what is the approximate value of the mechanical efficiency at 50 % of the rated load? (a) 45% (b) 55 % (c) 65% (d) 75%
Last Answer : Ans :c
Description : Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion: Fast decoupled load flow method gives approximate load flow solution because it uses several assumptions. Reason: Accuracy ... the correct reason for [a]. c) [a] is false and [r] is true.
Last Answer : c) [a] is false and [r] is true
Last Answer : Approximate estimation of power demand can be made by load survey method, statistical methods, mathematical method, economic parameters.
Description : The approximate representation of land use classification in India is [IAS 2010] (a) net area sown 25%; forests 33%; other areas 42% (b) net area sown 58%; forests 17%; other areas 25% (c) net area sown 43%; forests 29%; other areas 28% (d) net area sown 47%; forests 23%; other areas 30%
Last Answer : Ans: (d)
Description : The approximate length of the coastline of India is – (1) 5.500 km (2) 6,000 km (3) 6,500 km (4) 7,000 km
Last Answer : (4) 7,000 km Explanation: India has a land frontier of 15,200 km and a coastline of 7,517 km. Length of Coastline of Indian mainland is 6100 km. Coastline of Indian mainland is surrounded by Arabian Sea in the west, Bay of Bengal in the east, and Indian Ocean in the south.
Description : The approximate length of the coastline of India is (1) 5,500 km (2) 6,000 km (3) 6,500 km (4) 7,000 km
Last Answer : 7,000 km
Description : State the different methods of Power Generation adopted in India.
Last Answer : 1. Hydro energy or hydro Electric power plant 2. Nuclear energy or nuclear Power Plant 3. Fossil fuels: i) Thermal energy (by combustion of coal) or Thermal Power Plant ii) Natural gas ... from any organic waste materials. It contains mixture of methane(50-65 % in volume) and carbon dioxide