![Problem 3. A three-phase transformer is constructed using three single-phase two-winding trans- formers, each has the same ratings of 500 MVA, 15/240 kV, and leakage impedance of XT.p.u 0.2 p.u The high-voltage side of the three-phase transformer is connected to a three-phase Y-connected load that absorbs 1000 MVA at 0.9 power factor (lagging). The phase-a voltage across the load is Van 2402(0) kV. Answer the following questions. [10 points] a) Calculate the phase-a voltage at the low-voltage side (denoted by VAN) if the low-voltage wind- ings are connected in Y configuration. [5 points] b) Calculate the phase-a voltage at the low-voltage side (denoted by VAN) if the low-voltage wind- ings are connected in A configuration. [5 points](http://img.homeworklib.com/questions/ef4e8790-f1bf-11eb-aea7-2bd7a9e8e513.png?x-oss-process=image/resize,w_560)
Homework Answers
Add Answer to:
Problem 3. A three-phase transformer is constructed using three single-phase two-winding trans- formers, each has the...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connecte...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connected 22 KV 40 MVA A-connected 4 KV 15 MVA Primary Tertiary Neglecting winding resistance and exciting current, the per unit leakage reactance are: Mps 9.6 % pu on 40 MVA, 11022 KV xm = 7.2 % pu on 40 MVA, I 10/ 4 KV Xsti: 12 % pu on 40 MVA, 22/ 4 KV Determine the era nyimpedances of the transformer...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
The ratings of a three-phase, three-winding transformer are Y connected, 66 kV, 20 MVA Primary (1):...
The ratings of a three-phase, three-winding transformer are Y connected, 66 kV, 20 MVA Primary (1): Secondary (2):Y connected, 13.2 kV, 15 MVA Tertiary (3): A connected, 2.3 kV, 5 MVA Neglecting winding resistances and exciting current, the per-unit leakage reactances are: X12 0.08 on a 20-MVA, 66-kV base X13 0.10 on a 20-MVA, 66-kV base X23 0.09 on a 15-MVA, 13.2-kV base (a) Determine the per-unit reactances Xi, X2, X3 of the equivalent circuit on a 20- MVA, 66-kV...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the three-phase transformer rated at 120 kV and the secondary side rated at 13.8 kV. The rated power of the transformer bank is 20 MVA. One side of the transformer bank is connected to a 120 kV transmission line, and the other side is connected to a three-phase load of 15 MVA at 0.85 lagging power factor. Compute the following: a) The turns...
Solution of two part please with steps Question 1: Ve-le The rating of s three phase...
Solution of two part please with steps
Question 1: Ve-le The rating of s three phase three winding transformer are: Y-connected un KV 40 MVA Y-connected 22 KV 40 MVA 4 KV 15 MVA Primary Secondary Tertiary A-connected Neglecting winding resistance and exciting current, the per unit leakage reactance are X 9.6 % pu on 40 MVA. 110/22 KV X7.2 % pu on 40 MVA, 110/ 4 KV Xg 12 % pu on 40 MVA, 22 4 KV a) Determine...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
3) A two-winding transformer, three phase, 345/230 kV has a single phase capacity of 500 MVA:...
3) A two-winding transformer, three phase, 345/230 kV has a single phase capacity of 500 MVA: (a) Determine the total 3-phase capacity, if it is connected as Auto-XMR (b) Determine the voltage and current capacity per each phase Js. LI V, s, V
A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a single-phase equivalent series reactance...
A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a single-phase equivalent series reactance of 6.08 ? as referred to its high-voltage terminals. The transformer is supplying a load of 375 MVA at 0.89 power factor leading at a voltage of 24 kV (line to line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.17 +/2.2 ? connected to its high-voltage terminals. For these conditions, calculate (a) the line-to-line voltage at the high-...
2.14 The resistances and leakage reactances of a 40-kVA 60-Hz 7.97-kV-V:240-V single-phase distribution transformer are where...
2.14 The resistances and leakage reactances of a 40-kVA 60-Hz 7.97-kV-V:240-V single-phase distribution transformer are where subscript 1 denotes the 7.97-kV winding and subscript 2 denotes the 240-V winding. Each quantity is referred to its own side of the transformer. Consider a rated-kVA load connected at the low-voltage terminals. Assuming the load voltage to remain constant at 240 V use MATLAB to plot the high-side terminal voltage as a function of the power-factor angle as the load power factor varies...
A 400-MVA, 200-kV/20-kV, three phase Y-Y transformer has an equivalent series impedance of ZTL = 0.012...
A 400-MVA, 200-kV/20-kV, three phase Y-Y transformer has an equivalent series impedance of ZTL = 0.012 + 20.0162 per phase referred to the low-voltage side (secondary side). The transformer is supplying a three-phase load of 300-MVA, 0.8 power factor lagging at terminal voltage of 20 kV (line-to-line) on its low-voltage side (secondary side) as shown in Fig. 22. The primary is supplied from a transmission line with an impedance of ZL = 0.5 + j1.0 per phase. The line-to-neutral load...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connected 22 KV 40 MVA A-connected 4 KV 15 MVA Primary Tertiary Neglecting winding resistance and exciting current, the per unit leakage reactance are: Mps 9.6 % pu on 40 MVA, 11022 KV xm = 7.2 % pu on 40 MVA, I 10/ 4 KV Xsti: 12 % pu on 40 MVA, 22/ 4 KV Determine the era nyimpedances of the transformer...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
The ratings of a three-phase, three-winding transformer are Y connected, 66 kV, 20 MVA Primary (1): Secondary (2):Y connected, 13.2 kV, 15 MVA Tertiary (3): A connected, 2.3 kV, 5 MVA Neglecting winding resistances and exciting current, the per-unit leakage reactances are: X12 0.08 on a 20-MVA, 66-kV base X13 0.10 on a 20-MVA, 66-kV base X23 0.09 on a 15-MVA, 13.2-kV base (a) Determine the per-unit reactances Xi, X2, X3 of the equivalent circuit on a 20- MVA, 66-kV...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the three-phase transformer rated at 120 kV and the secondary side rated at 13.8 kV. The rated power of the transformer bank is 20 MVA. One side of the transformer bank is connected to a 120 kV transmission line, and the other side is connected to a three-phase load of 15 MVA at 0.85 lagging power factor. Compute the following: a) The turns...
Solution of two part please with steps
Question 1: Ve-le The rating of s three phase three winding transformer are: Y-connected un KV 40 MVA Y-connected 22 KV 40 MVA 4 KV 15 MVA Primary Secondary Tertiary A-connected Neglecting winding resistance and exciting current, the per unit leakage reactance are X 9.6 % pu on 40 MVA. 110/22 KV X7.2 % pu on 40 MVA, 110/ 4 KV Xg 12 % pu on 40 MVA, 22 4 KV a) Determine...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
3) A two-winding transformer, three phase, 345/230 kV has a single phase capacity of 500 MVA: (a) Determine the total 3-phase capacity, if it is connected as Auto-XMR (b) Determine the voltage and current capacity per each phase Js. LI V, s, V
A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a single-phase equivalent series reactance of 6.08 ? as referred to its high-voltage terminals. The transformer is supplying a load of 375 MVA at 0.89 power factor leading at a voltage of 24 kV (line to line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.17 +/2.2 ? connected to its high-voltage terminals. For these conditions, calculate (a) the line-to-line voltage at the high-...
2.14 The resistances and leakage reactances of a 40-kVA 60-Hz 7.97-kV-V:240-V single-phase distribution transformer are where subscript 1 denotes the 7.97-kV winding and subscript 2 denotes the 240-V winding. Each quantity is referred to its own side of the transformer. Consider a rated-kVA load connected at the low-voltage terminals. Assuming the load voltage to remain constant at 240 V use MATLAB to plot the high-side terminal voltage as a function of the power-factor angle as the load power factor varies...
A 400-MVA, 200-kV/20-kV, three phase Y-Y transformer has an equivalent series impedance of ZTL = 0.012 + 20.0162 per phase referred to the low-voltage side (secondary side). The transformer is supplying a three-phase load of 300-MVA, 0.8 power factor lagging at terminal voltage of 20 kV (line-to-line) on its low-voltage side (secondary side) as shown in Fig. 22. The primary is supplied from a transmission line with an impedance of ZL = 0.5 + j1.0 per phase. The line-to-neutral load...
Most questions answered within 3 hours.
-
For regularization, we added the regularizer to the loss
function. Does it make sense to multiply...
asked 15 seconds from now -
b. A freezer you got from a student sale has an inside
temperature of – 10C;...
asked 1 minute ago -
PEARSON
Years
S&P 500
Stock Price
2014
1,692
$68.00
2015
1,978
$102.00
2016
1,884
$110.00
2017...
asked 3 minutes ago -
You roll a fair 6-sided dice, let Y be the outcome of the dice
roll. Then...
asked 32 minutes ago -
If the value of the range is equal to zero, then this indicates
that:
A. there...
asked 53 minutes ago -
Based on Simms' (1994) articulation of psychological privacy to
promote development of self-identity, for example, do...
asked 15 minutes ago -
Use C programe to :
Develop an algorithm, flow chart and write a C program to...
asked 37 minutes ago -
Benzene has a vapor pressure of 75.0 Torr at 22.0 °C and an
enthalpy of evaporation...
asked 21 minutes ago -
How does a leadership philosophy shape service delivery in a
human services organization?
asked 30 minutes ago -
Which of the following statements about hormonal regulation of
glycogen synthesis and degradation are correct?
Multiple...
asked 36 minutes ago -
1. Describe all
necessary steps and conditions for execution of a java".
2. What
is maven...
asked 47 minutes ago -
What is the temperature of a 3.5L container with 1.502 mol
carbon dioxide at 10.76 atm?...
asked 43 minutes ago