An AC-AC converter with a thyristor connected to a 250 V (phase-neutral) and 50 Hz source is Y-connected. It feeds a 3-phase resistor. Circuit losses are neglected. Load resistance is 10 Ω / phase, α trigger angle is ?/6rad.
Accordingly
a) Calculate the effective values of the output voltage, output current and output power of the converter.
b) Find the total reactive and total harmonic powers for the α angle value you obtained.
c) Calculate the phase shift angle, phase shift factor and power factor of the basic component of the output phase current for α.
Please write all a-b-c answers clearly. Thank You!!
An AC-AC converter with a thyristor connected to a 250 V (phase-neutral) and 50 Hz source...
Consider a three-phase thyristor-based AC-DC converter supplying a “superconductive inductance” of 10 H and 200 A. The grid voltage is 400VLL/60Hz. A) What is the shortest time to fully charge the Inductor, from “zero energy condition?” What value of firing angle of the thyristors (α) should be used in this case? B) When the inductor is fully charged, what value of α should be used to keep it at “stand-by”? How much reactive power does the AC-DC converter absorb from...
esign three phase AC/DC converter with the following parameters - Vin (Line-Line) = 400 rms - Frequency = 50 Hz - Vout = 0 to 450V Simulate the converter under the following conditions 1- The load is Resistive, with 20Ω. Study the operation of the converter in term of: o Output voltage o Output current o Thyristor voltage and current o Relation of output voltage with firing angle alpha o Input and output harmonic spectrum.
(a) Two three-phase, 400kV (rms), 50Hz, AC networks are connected together via a current-source HVDC link made up of a three-phase, 12-pulse full-wave thyristor rectifier and a three-phase, 12-pulse full-wave thyristor inverter. (i) Draw the circuit diagram for this system and explain, for the rectifier stage, how the firing delay angle may be used to control the average DC voltage. (ii) Explain the main advantages of HVDC transmission compared to AC transmission. (b) An H-Bridge converter is to be used...
A single-phase half-wave ac voltage controller feeds a load of R = 40 Ω with (maximum voltage of 230V), 50 Hz. Firing angle of thyristor is 60°. Determine (a) rms value of output voltage (b) power delivered to load and input pf and (c) average input current. (a) The rms value of load voltage. And repeat the above for A single phase Full-wave ac voltage controller?
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Question: A three-phase line has an impedance of 1 + j2 Ω per phase. The line feeds two balanced three-phase loads that are connected in parallel. The first load is Y-connected and has an impedance of 20+j40 Ω per phase. The second load is ∆-connected and has an impedance of 30-j60 Ω per phase. The line-to-line voltage at the load end of the line is 415V. Taking the phase voltage Va as reference, determine: a) The total current per phase...
A 3-phase 4 wire symmetrical (balanced) Y-connected source with
line voltage 340V (take the phase of VanVan to be 0 degrees) feeds
an unbalanced three phase load formed by the impedances
ZY1=14+j(14)Ω, ZY2=7+j(11)Ω and ZY3=20+j(−14)Ω connected in a Y
(a.k.a. “star”, or a “tee”) configuration. Find the line currents,
neutral current (current in the fourth “return” wire), and active
power in each phase.
(20 points) A 3-phase 4 wire symmetrical (balanced) Yconnected source with line voltage 340V (take the phase...
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The single-phase full converter as shown in Figure 8-1 has an RL load having L = 5 mH, R-0.8 Ω, and E -0 V. The input voltage is Vs = 120 V at(rms) 60 Hz. The delay angle or-α-300 Calculate the performance parameters. Assume ideal thyristor switches. the rms thyristor current IR Figure 8-1 Single-Phase Full Converter T1 T4 太T2 0