Draw a 5-stage Marx impulse generator circuit showing the voltages of all points. Also, show the capacitor's voltages and their polarities if the generator is supplied by a DC voltage source of 127 kV. Explain how it works. What is the output testing voltage if each stage has a voltage drop of 7 kV?
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- Q/ A three stage Cockroft-Walton generator is supplied by 212.133 V, 50 Hz source via a transformer with turns ratio equals to 2/800. All capacitors have a value of (0.8 μF). The protection current equals to 15 mA. Find the following: a. Find the output peak voltage that is used for testing without considering the voltage drop. b. Find the output peak voltage that is used for testing with considering the voltage drop. c. What is the ripple voltage? d. If the lowest capacitor is increased to twice its value, what is the output peak voltage that is used for testing with considering the voltage drop. e. Comparing the results of ( b ) and ( d ) above , do you recommend doubling the value of the lowest capacitor or not? f. According to the circuit values, is the 3 stages represents the optimum number of stages for this generator?Q/ a. Draw a 5-stage Marx impulse generator circuit showing the voltages of all points. Also, show the capacitor’s voltages and their polarities if the generator is supplied by a DC voltage source of 127 kV. b. Explain how it works. c. What is the output testing voltage if each stage has a voltage drop of 7 kV? d. In the lab, if the first spark gap is not small enough to start the avalanche (the breakdown of all gaps), and you cannot make it smaller, what could you do to fix this problem?20. The alternating flux in the primary of a transformer isA. leading the magnetizing current.B. in phase with the magnetizing current.C. in phase with the applied voltage.D. leading the applied voltage. 20.b. In the field, the transformer test which is undesirable to apply repeatedly is theA. impulse test.B. induced-voltage test.C. short-circuit temperature test.D. dielectric test
- In the circuit below, if the inductance L is large enough to operate in continuous current mode. a) Draw the waveform of the output voltage and mains current for the 45 degree trigger angle when the switch S is in transmission. b) Average value of output DA voltage VDC1 when switch S is open, output DA when switch S is closed (in transmission) If the average value of the voltage is VDC2, calculate the value of VDC1 / VDC2. Lesson: power electronics please quickA three stage Cockroft-Walton generator is supplied by 212.133 V, 50 Hz source via a transformer with turns ratio equals to 2/800. All capacitors have a value of (0.8 µF). The protection current equals to 15 mA. Find the following: a. Find the output peak voltage that is used for testing without considering the voltage drop. b. Find the output peak voltage that is used for testing with considering the voltage drop. e. What is the ripple voltage? d. If the lowest capacitor is increased to twice its value, what is the output peak voltage that is used for testing with considering the voltage drop. e. Comparing the results of (b) and (d) above, do you recommend doubling the value of the lowest capacitor or not? f. According to the circuit values, is the 3 stages represents the optimum number of stages for this generator?Q 03: Briefly discuss, how the energy consumptions for operations of a fork lifter could be justified. Suppose that a fork lifter has a total energy consumption of 150 W.Hr. The total trips of the vehicle are 375. How the battery duty cycle may be calculated in this case?
- 1-Alternators can be overloaded by 10 percentage for 10-15 minutes, this a. Steady state voltage stability will get affected b. may reduce the stability limit c. may disturb Nose point d. may lose Angular stability 2-Often, the network is referred as an infinite bus when a change in input mechanical power or in field excitation to the unit does not cause an appreciable change in a. system frequency or terminal voltage b. system frequency alone c. system frequency and terminal voltage d. Total production costA generating station has a maximum demand of 20 MW, a load factor of 60%, a plant capacity factor of 48% and a plant use factor of 80% Find: 1)the daily energy produced (2) the reserve capacity of the plant. (3) The maximum energy that could be produced daily if the plant was ruinining all the time.(4).Maximum energy that could be produced daily if the plant was running fully loaded and according to an operating schedule.Explore the use of FACTS (Flexible Alternating Current Transmission Systems) devices in advanced power system control and stability enhancement.
- chapter 1 Q1 The rms value the AC input voltage to the of Circuit shown is 230U, and the firing angle is maintained Current is 5 A. constant at 45° so that the load a) Calculate the de output voltage. b) Assume that the load resistance remains the a same, find the current is a FWD is used at the output. c) If^ prime prime ScR^ prime prime " is open circuited, find load voltage and current a is the Same) (FWD is still connected and high. "L Load Ans[146.4U,6.03A ; 3.c2A] 3 3 FWD1. Thyristor-Controlled Series Capacitor (TCSC) for power factorimprovement2. What are the constraints are followed in Unit commitment?A 400 kW, three-blade wind turbine is designed to deliver power at a wind speed of 15 m/s. The blades have a depth of 14 m, and the rated speed of the turbine is 48 rpm. The air density is 1.226 kg/m3. Calculate (a) area swept out by the turbine (b) wind power available to drive the turbine (c) capacity factor of the turbine