1 The line to ground voltages on the high voltage side of a step-up transformer are...

1 The line to ground voltages on the high voltage side of a step-up transformer are 100 kV, 33 kV and 38 kV on phases a, b and c respectively. The voltage of phase a leads that of phase b by 100° and lags that of phase c by 176.5°. Determine the symmetrical negative phase sequence component of phase a.

2. A 3-phase, 4-wire system supplies loads which are unequally distributed in the three phases. An analysis of the current flowing in A, B and C lines show that in line A, the positive phase sequence component is 200/0° A and the negative phase sequence component is 100/60° A. The total observed current flowing back to the supply in the neutral is 300/300° A. Calculate the current in line B.

3. A 100 MVA, 20 kV alternator has X1 = X2 = 0.20 pu and X0 = 0.05 pu. The neutral of the generator is grounded through a reactor. Find the ohmic value of reactor to limit the current for a single line to ground fault equal to the current for a three-phase fault.

Expert Solution

Manojponduru answered 1 month ago

Explain the High Voltage Generator with using 'Fly Back Transformer'.

3. Electric power is transferred at very high voltages over long distances. Transmission of high voltage...

3. Electric power is transferred at very high voltages over long distances. Transmission of high voltage Explain how it reduces power loss on the lines. 4. If two points have the same potential, this test load will be taken from one point to another. Does it mean that no work will be carried out during the course? This need no force application shows that it is not? Discuss.

“High voltage” power lines are often seen suspended high above the ground. Two of these power...

“High voltage” power lines are often seen suspended high above the ground. Two of these power lines are suspended above a physics professor who is out for a walk. The power line on the left carries a current out of the page; the power line on the right carries a current into the page. a) What is the direction of the magnetic field produced by the two currents at the location of the physics professor? He is on the ground...

Describe your design for a transformer that steps up voltage from 120 to 1200 V. (Talk...

Describe your design for a transformer that steps up voltage from 120 to 1200 V. (Talk about the numbers of turns and the material of the core, specifically.) Will the input and output be AC or DC electricity (there is only one right answer for this one unless you get fancy)? Compare the input current to the output current (hint: the output power in the secondary coils should be calculated to be the same (actually slightly less, due to inefficiencies)...

I have to design a single phase/50Hz step down transformer. Following information is given Primary Voltage...

I have to design a single phase/50Hz step down transformer. Following information is given Primary Voltage =240V, Secondary Voltage and current on secondary side should be 24V and 2A respectively. efficiency should be in range of 70 to 80%. Provide me all the necessary calculations to design this step down transformer. And also note down all the hardware components that i should buy for this design. Note: Tell me if i have missed any information for this project.

A single phase, 300???, 11??/2.2??, 60 ?? transformer has the following parameters referred to the high-voltage...

A single phase, 300???, 11??/2.2??, 60 ?? transformer has the following parameters referred to the high-voltage side: ?? = 57.6??, ?? = 16.34??, ??? = 2.784? and ??? = 3.5?. If a load of ????? = 16∠30°? connected to the low-voltage side: a) Find the voltage regulation? b) Draw the phasor diagram? c) Find the efficiency of the transformer? d) Repeat part a and b at ????? = 16∠ − 30°??

Under ground, l-length high voltage power cable the radius a of the conductive wire inside is...

Under ground, l-length high voltage power cable the radius a of the conductive wire inside is the radius of the outer cylindrical lead conductive coating b. Between conductors the cylindrical area is filled with silicone-plastic insulator. Q load uniformly on l conductor wire It is scattered. (Consider the thicker shape of the television antenna cable.) a) Electric field in r <a region and in a region between a <r <b with the help of Gauss's law, b) Conductive lead outer...

A high voltage power line carries a current of 105 A at a location where the...

A high voltage power line carries a current of 105 A at a location where the Earth's magnetic field has a magnitude of 0.588 G and points the to the North, 74.7 degrees below the horizontal. Calculate the magnitude of the magnetic force exerted on a 253 m length of wire if the current in the wire flows horizontally toward the east? _____________________________________________________________ Calculate the magnitue of the magnetic force exerted on a 253 m length of wire if the...

You build a transformer with 100 turns of wire on side 1, and 500 turns on...

You build a transformer with 100 turns of wire on side 1, and 500 turns on side 2. A) If you put a voltage of 100 V (AC) on side 1, what voltage would you get on side 2? B) If you put a voltage of 100 V (AC) on side 1 with a current of 1 Amp (AC), what current would you get on side 2? C) If you put 100 V of DC voltage on side 1, what...

A high-voltage power line carries a current of 122 A at a location where the Earth's...

A high-voltage power line carries a current of 122 A at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 68 ∘ below the horizontal. Find the direction of the magnetic force exerted on a 330 mm length of wire if the current in the wire flows horizontally toward the east. A:force points toward north, 22 ∘∘ above the horizontal B:force points toward north, 68 ∘∘ above the horizontal C:force points...

Question