Solve showing all the steps and drawing clearly Consider the power system given below. Draw the equivalent circuit with impedance/reactancelabelled with per unit values on a base of 100 MVA and the transformer voltages.Gen90 MVA22kVXp.u.=0.18138+T1T3Line 1220kVLine 2110kVBET222/220kV220/11kV22/110kV110/11kVT1: 50MVA40MVAT2:T3: 40MVAT4: 40MVALine 1: 48.4Ohms (total)Line 2: 65.43Ohms (total)BET4Xp.u.= 0.10Xp.u.= 0.06Xp.u.= 0.064Xp.u.=0.082Motor66.5MVA10.45kVXp.u.=0.1853ph Load 10.45kVAbsorbs 57MVA@ 0.6pf (lag)PEguru.com

Power System : The power system is a network that includes the generation, distribution, and…

Consider the power system given below. Draw the equivalent circuit with impedance/reactance labelled with per unit values on a base of 100 MVA and the transformer voltages. Gen 90 MVA 22kV Xp.u.=0.18 1 384 T1 T3 Line 1 220kV Line 2 m 110kV BE T2 T1: 50MVA T2: 40MVA T3: 40MVA T4: 40MVA Line 1: 48.4Ohms (total) Line 2: 65.43Ohms (total) 22/220kV 220/11kV 22/110kV 110/11kV BE T4 Xp.u.= 0.10 Xp.u.= 0.06 Xp.u.= 0.064 Xp.u.=0.08 2 Motor 66.5MVA 10.45kV Xp.u.=0.185 3ph Load 10.45kV Absorbs 57MVA @ 0.6pf (lag) PEguru.com

Consider the power system given below. Draw the equivalent circuit with impedance/reactance labelled with per unit values on a base of 100 MVA and the transformer voltages. Gen 90 MVA 22kV Xp.u.=0.18 1 384 T1 T3 Line 1 220kV Line 2 m 110kV BE T2 T1: 50MVA T2: 40MVA T3: 40MVA T4: 40MVA Line 1: 48.4Ohms (total) Line 2: 65.43Ohms (total) 22/220kV 220/11kV 22/110kV 110/11kV BE T4 Xp.u.= 0.10 Xp.u.= 0.06 Xp.u.= 0.064 Xp.u.=0.08 2 Motor 66.5MVA 10.45kV Xp.u.=0.185 3ph Load 10.45kV Absorbs 57MVA @ 0.6pf (lag) PEguru.com

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.33P: Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage...

See similar textbooks

Similar questions

A bank of three single-phase transformers, each rated 30MVA,38.1/3.81kV, are connected in Y- with a balanced load of three 1, Y-connected resistors. Choosing a base of 90MVA,66kV for the high-voltage side of the three-phase transformer. spify the base for the low-voltage side. Compute the per-unit resistance of the load on the base for the low-voltage side. Also, determine the load resistance in ohms referred to the high-voltage side and the per-unit value on the chosen base.
In developing per-unit circuits of systems such as the one shown in Figure 3.10. when moving across a transformer, the voltage base is changed in proportion to the transformer voltage ratings. (a) True (b) False
Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage windings are connected in Y. (a) For the low-voltage side, connect the windings in , place the polarity marks, and label the terminals a, b, and c in accordance with the American standard. (b) Relabel the terminals a, b, and c such that VAN is 90 out of phase with Va for positive sequence.
In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected in star with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. The reactances of all other elements are given in Table 1 (in 2) and the voltage levels are given in Table 2. p.u. G1 p.u. T1 jö Per-Unit Convert all values to p.u. on a 15 MVA base. Xa= p.u. Xc₂= XL = V BABE G1 2 X 9 T3 Figure 1: A section of the distribution system T1 L Table 1: Sequence reactances (2) 3 G1 L G2 0.3 0.59 0.01 4 L 9/10 10 Fault Voltage What is the voltage at bus 3 (in Volts) after the fault has occurred? Vp= V T2 5 T2 34 10/4 Table 2: Voltage bases (kV) G2 4 T3 10/9 | G2 Fault Current A three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in KA. Ip=-j KA So
A A-A three transformer bank, each of 10 kVA supply a total load of 20 kVA. One of the transformer become, disable and hence the circuit works on V-V open delta connection. Find for this connection. (a) (b) (c) (d) (e) kVA load carried by each transformer. % of rated load carried by each transformer. Total kVA rating of V-V open A connection. Ratio of V-V and closed A ratings. % increase in load on each of the two V-V connected transformers. M
What is the main direct cause of reactive power in AC system?A. Resistance of transmission linesB. Inductance and capacitance in the loadsC. Ideal transformer connected in the systemD. Power produced by generator
10 A three-phase transformer is given. The number of turns of the high voltage winding is N1=850 and the number of turns of the low voltage winding is N2=34. The high voltage winding is energized with V1= 10 kV rms line-to-line and V2= 400 V rms line-to-line has been taken from the low voltage winding. What is the connection of the low voltage winding if the high voltage winding is Y-connected? Εισαγάγετε την απάντησή σας
A 50 Hz, Scott connected transformer supplies an unbalanced two phase load at ( 400 V) per phase. For the leading phase the load has a resistance of (13.3 ohm) and capacitor of (318) micro farad in series. For the other phase the load consists of resistance (10) ohm and an inductance of (42.3) mH. Calculate both mathematically and graphically the lines currents on 3 phase side. The main transformer primary to secondary turns ratio is (12/1).
Some power devices have bidirectional current capability Select one: O a. True b. False The voltage regulation of the transformer will depend on the load Select one: O a. For mainly inductive or resistive load, the voltage regulation is negative O b. For mainly capacitive, inductive or resistive load, the regulation is positive Oc. For mainly capacitive load, voltage regulation is positive and other loads it is negative. O d. For mainly capacitive load, voltage regulation is negative.
Two 100-kW, single-phase transformers are connected in parallel both on the primary and secondary. One transformer has an ohmic drop of 0.5% at full-load and an inductive drop of 8% at full-load current. The other has an ohmic drop of 0.75% and an inductive drop of 2%. Show how they will share a load of 180 kW at 0.9 p.f.
6.5% ans ex A so kvA. 2o00/20 V, So He single-phase transformar has impedance drof of8% and resistance drop of 4%. Caleulate. The Requlation of the Thams former at full- Load o8 P.s Legging. also find The Power factor at which Voltage requlation will Be Zero. Sols 0.5 leading. s alculate The % Noltege Requlation af atransformar in w hich the Percantage resistance drof is 1% and Percentage dre is 6% when The Power fador is 0.8 lagging ) > unity aMS 38 % ans 1 % (シ→ 0.8 leading . amS - 2.2%
D = 0.9 1.5° and B = 150 65° has at the load end a The load voltage and current are V₁ and I₁ A' B' VL B][Y and evaluate these constants. C' D' IL A long line with A transformer having series impedance Zr Obtain expression for Vs and Is in the form 10067°. [$]-[ =