In which of the following wind energy conversion system, guy wire may be required? O a. Vertical axis wind turbines 1O b. Horizontal axis wind turbines O c. Up wind turbines O d. Down wind turbines
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- a) Determine total admittance and impedance. b) Draw admittance diagram and impedance diagram. c) Determine the values of C and L. d) Determine the voltage ?? ⃗ and the currents ?? (Se image ! last task)match column a to b. Electricity flows from the power plant Through wires to the step-up transformer. The transformer raises the voltage so it can travel long distances - it is raised as high as 756,000 volts. Electricity is generated in the power plant by hydroelectric, nuclear, wind or geothermal energy. The electric current then runs through the power lines to the substation transformer where voltage is lowered to between 2000 and 13000 volts. The turbine spins a huge magnet inside a copper wire. Heat energy converts to mechanical energy which then converts to electrical energy in the generator. From there, electricity comes into your home through a service box, where your heter IS located to electrical consumption. measure your Wires Taice electricity around your home, powering your lights and all your other electrical appliances. Electricity is then taken through the lines to a pole transformer or transformer box if underground then the voltage is lowered again to 120 or 220…With schematic diagram, explain the Wind Power Plant.
- h.1. In an alternating-current system, the maximum size for a copper grounding electrode conductor isA. 250 kcmil.B. 3/0.C. 500 kcmil.D. 4/0. h.2. The figure shows a fault condition in an ungrounded electrical system. Which of the following will occurbecause of the fault in this system?A. Only the overcurrent protector at Point A will trip open.B. The ground fault will heavily damage the service.C. Nothing will happen until a second ground fault occurs.D. The overcurrent protection will trip, shutting off all the line side power.5. When should corner pull boxes be used in an installation?A. At all 90 degree bendsB. At all bends less than 90 degreesC. At all bends greater than 100 degreesD. At all bends1. It describe the relationship of current voltage and resistance. 2. There are the available options for the pilot, In case of a single generator failure in large multiengine aircraft. Choose all the correct answers. 3. This system converts 115AC to 28VDC in most large body aircraft.
- A. Discuss the arcing phenomenon in a circuit breaker. B. Discuss the types of oil circuit breakers. With referencesWhich of the following Surge Diverter use non-linear resistances in its fabrication? Rod - Gape SD. Lightning Arrester SD. Expulsion Tube SD. O All of the above.Choose the right answer. 1. The basic elements in any power system are 2. The reactors have the following problems 3. If a fault occurred between phases (A, B, and C) simultaneously the fault is called if the fault occurred on phase (A) only or phases (A, B), it may take the following types and ...... where or 4. The symmetrical component method is 5. Conditions for succesful operation of a power system are 6. The reason we use the numerical methods in load flow analysis is 7. The main diagonal of Y-bus numbers by a factor / not any) 8. The properties of the fault currents and (changes the signs / keeps the signs / multiplies the .... .... ....... re
- In a hydroelectric power station, the penstock, turbine and generator efficiencies are respectively 95 %, 90% and 85 %. The overall efficiency of the plant?What is The prime mover and conversion of power in the hydro power stationMarked out of 1.50 P Flag question 13. i) The data for a wind turbine is given below: Wind speed = 14 meters/sec, Length of blade = 10 meter. Choose the correct statement for this wind turbine. a. The input wind power to the turbine is 258 KW b. The input wind power to the turbine is 51.7KW c. The input wind power to the turbine is 25.8KW d. The input wind power to the turbine is 517KW 13. ii) Refer to the above wind turbine choose the correct statement a. The wind rotor swept area is 40square meters. b. The wind rotor swept area is 62.4 square meters. c. The wind rotor swept area is 314 square meters. d. The wind rotor swept area is 31.4 square meters. O O O O