prove that In sych generator, short circuit ratio is just the reciprocal of the per-unit value...
prove that In sych generator, short circuit ratio is just the reciprocal of the per-unit value of the approximate saturated synchronous reactance calculated by Equation (5- 26)(Electrical machines fundemntals, chapman 4th edition)
Homework Answers
Add Answer to:
prove that In sych generator, short circuit ratio is just the
reciprocal of the per-unit value...
4. Synchronous generator DC test, open circuit test and short circuit test are done to a...
4. Synchronous generator DC test, open circuit test and short circuit test are done to a 240V, 60Hz, Wye-connected, 12-pole synchronous generator. The test results are shown below: DC test: Line-to-line voltage: 15V Line current: 45A OC test: Field current (W): 5A Line-to-line voltage: 240V SC test: Field current (l): 5A Line current: 68.514A Per-phase Reactance Xs: 22 a. Determine the per-phase model resistance R for the synchronous generator and draw the 3- phase model of this generator labeled with...
A 12 kV, 300 MVA synchronous generator is tested at a field current of 200 A....
A 12 kV, 300 MVA synchronous generator is tested at a field current of 200 A. The open-circuit voltage was found to be 10 kV and the short-circuit current was 7.5 kA. The stator resistance was measured at 0.1 ohms per phase. i) Find the value of the synchronous reactance in per-unit. [ 2 marks ] ii) The synchronous generator is delivering half rated output at a terminal voltage of 5% below rated voltage and a power factor of 0.7...
A 450 MVA, 26-kV generator is connected to a 345-kV power system through a 500MVA, 26-kV:345-kV t...
A 450 MVA, 26-kV generator is connected to a 345-kV power system through a 500MVA, 26-kV:345-kV transformer which can be represented by a series reactance of 95 m Ω when referred to its low-voltage terminals. The generator has a saturated synchronous reactance of 1.73 per unit and a rated-open- circuit-voltage field current of 2140 A. Under normal operating procedures, the generator is operated under automatic voltage regulation set to maintain its terminal voltage at 26 kV. In this problem you...
A synchronous generator is driven by a diesel engine to provide electricity to a remote mining operation. The generator is three-phase, Y-connected, 60 Hz, 900 rpm, 600 V, 3300 kW, 4125 kVA, and it has a synchronous reactance of 0.120 Ω per p
A synchronous generator is driven by a diesel engine to provide electricity to a remote mining operation. The generator is three-phase, Y-connected, 60 Hz, 900 rpm, 600 V, 3300 kW, 4125 kVA, and it has a synchronous reactance of 0.120 Ω per phase. Ignore all losses, and assume the machine iron is not saturated.(a) The generator is set to deliver its rated active power at unity power factorand rated terminal voltage. Determine:i. The speed of the diesel engine driving the generator;ii. The rotor electrical...
Transformer TI : 50 MVA, 10 kV Y/138 kV Y, X=0.10 per unit; Transformer T2: 100 MVA, 15 kV D/138 kV Y, X-0.10 per unit; Each 138-kV line: X1-400 A three-phase short circuit occurs at bus 5,...
Transformer TI : 50 MVA, 10 kV Y/138 kV Y, X=0.10 per unit; Transformer T2: 100 MVA, 15 kV D/138 kV Y, X-0.10 per unit; Each 138-kV line: X1-400 A three-phase short circuit occurs at bus 5, where the prefault voltage is 15 kV. Prefault load current is neglected. (a)Draw the positive-sequence reactance diagram in per-unit on a 100-MVA, 15-kV base in the zone of generator G2. Determine: (b) the The'venin equivalent at the fault, (c) the subtransient fault current...
solve no: 3.14 , 3.16, 3.19 please show each step and solve for beginners 120 Power...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
Values of modulus of elasticity (MOE, the ratio of stress, i.e., force per unit area, to...
Values of modulus of elasticity
(MOE, the ratio of stress, i.e., force per unit area, to strain,
i.e., deformation per unit length, in GPa) and flexural strength (a
measure of the ability to resist failure in bending, in MPa) were
determined for a sample of concrete beams of a certain type,
resulting in the following data (read from a graph in the article
"Effects of Aggregates and Microfillers on the Flexural Properties
of Concrete"†).
Concrete"T). MOE 29.8 33.2 33.7 35.3...
4. Synchronous generator DC test, open circuit test and short circuit test are done to a 240V, 60Hz, Wye-connected, 12-pole synchronous generator. The test results are shown below: DC test: Line-to-line voltage: 15V Line current: 45A OC test: Field current (W): 5A Line-to-line voltage: 240V SC test: Field current (l): 5A Line current: 68.514A Per-phase Reactance Xs: 22 a. Determine the per-phase model resistance R for the synchronous generator and draw the 3- phase model of this generator labeled with...
Transformer TI : 50 MVA, 10 kV Y/138 kV Y, X=0.10 per unit; Transformer T2: 100 MVA, 15 kV D/138 kV Y, X-0.10 per unit; Each 138-kV line: X1-400 A three-phase short circuit occurs at bus 5, where the prefault voltage is 15 kV. Prefault load current is neglected. (a)Draw the positive-sequence reactance diagram in per-unit on a 100-MVA, 15-kV base in the zone of generator G2. Determine: (b) the The'venin equivalent at the fault, (c) the subtransient fault current...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
Values of modulus of elasticity
(MOE, the ratio of stress, i.e., force per unit area, to strain,
i.e., deformation per unit length, in GPa) and flexural strength (a
measure of the ability to resist failure in bending, in MPa) were
determined for a sample of concrete beams of a certain type,
resulting in the following data (read from a graph in the article
"Effects of Aggregates and Microfillers on the Flexural Properties
of Concrete"†).
Concrete"T). MOE 29.8 33.2 33.7 35.3...
Most questions answered within 3 hours.
-
At the start of a CD it is spinning at a rate of 525 rpm
(revolutions...
asked 9 minutes ago -
4. Without doing any calculations, predict whether the observed
∆T would increase, decrease or remain the...
asked 1 hour ago -
Based on the range, which of the following sets of scores has
the greatest variability? 3,...
asked 2 hours ago -
Ripples in a pond travel at a velocity of 3 m/s with one peak
passing a...
asked 2 hours ago -
A man stands on the roof of a building of height 13.0 mm and
throws a...
asked 2 hours ago -
The extent to which assets are financed by borrowed funds and
other liabilities is indicated by:...
asked 3 hours ago -
Explain in detail
Germany is the fifth largest economy
explain what goods and services Germany specializes...
asked 3 hours ago -
The density of platinum is 21.45 g/mL. If a cube of platinum
with a mass of...
asked 3 hours ago -
Accounts Receivable
Sales
A/R Posting
Extended Sales Invoice
Packing Slip
Compare invoice to packing slip 2...
asked 3 hours ago -
Michaella, age 23, is a full-time law student and is claimed by
her parents as a...
asked 3 hours ago -
Why are polymers not typically casted into products?
asked 4 hours ago -
When rolling a die 129 times, what is the probability of rolling
a 6 no more...
asked 4 hours ago