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Figure 2.33 gives the general
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Power System Analysis and Design (MindTap Course List)
- Consider the balanced three-phase system shown in Figure 2.34. Deter mine v1(t) and i2(t). Assume positive phase sequence.arrow_forwardFor the circuit element of Problem 2.3, calculate (a) the instantaneous power absorbed, (b) the real power (state whether it is delivered or absorbed). (c) the reactive power (state whether delivered or absorbed). (d) the power factor (state whether lagging or leading). [Note: By convention the power factor cos() is positive. If | | is greater than 90, then the reference direction for current may be reversed, resulting in a positive value of cos() ].arrow_forwardConsider two interconnected voltage sources connected by a line of impedance Z=jX, as shown in Figure 2.27. (a) Obtain expressions for P12 and Q12. (b) Determine the maximum power transfer and the condition for it toarrow_forward
- For a 3-phase, 4-wire system having balanced supply and unbalanced load, the following sequence components are obtained: I1=200∠0° A, I2=100∠60° A°. If the Neutral current is equal to 300∠300° A, Calculate Ib." (THIS PROBLEM IS MULTIPLE CHOICE PLEASE CHOOSE ANSWER BELOW AND PROVIDE YOUR CLEAR SOLUTION!) A 0 A B 57.7350 A C 300∠-120° A D 100∠-120° Aarrow_forwardA three phase,Y connected, 215 V (line to line), 7.5 kW, 60 Hz, three pole IM has the following parameter values in Ohm/phase referred to the statorR₁ = 0.294 Ohm, R₂ = 0.144 Ohm, X₁ = 0.203 Ohm, X₂ = 0.409 Ohm, Xm = 10.25 Ohm.The total friction,windage and core losses may be assumed to be constant at 350 W independent of load. For a slip s = 0.02, compute the followingsa) Stator Currentb) Power Factor(pf)c) Rotor Speedd) Power Output(Shaft)e) Output(Shaft) Torquef) Efficiency(n)arrow_forwardA 210V, 50 Hz, single phase radial distribution system, the resistance of the wire is 0.0008 ohm/m supply and return. Two loads are connected and it consumes 10 and 10 A respectively and are fed from the cable at distance of 15 and 15 respectively. Calculate the voltage available across load 1 and 2arrow_forward
- Explain the concept of FACTS (Flexible Alternating Current Transmission Systems) devices. How do they enhance the control and stability of power systems? Provide examples of FACTS devices and their applications.arrow_forwardProblem 2B A star-connected three-phase load absorb 3000 W with power factor 0.433 lagging has a resistance series with an inductance in each branch. It is connected to the 400Vrms (line voltage), 4-wire, 50 Hz, 3-phase supply with the phase sequence is ABC and phase-A as reference has angle 10°.a. Sketch the circuit diagram of the system.b. Calculate the phase voltages of each loads. c. Calculate the phase currents that flow into each load.d. Draw for both of the phasor diagram of load currents and load voltages.arrow_forwardWhich of the following statement is wrong for single phase AC distribution system? 1the drop is the sum of moments of I cos φ and I sin φ components with distances equal to resistance and reactance respectively. 2the distance of separation between wires is relatively smaller as compared to overhead line. 3the net drop is the difference of the drop in reactance due to the quadrature component and in resistance due to inphase component of current. 4the inphase and quadrature components of current contribute to the voltage drop. 5the resistance component is normally higher than the inductive reactance component.arrow_forward
- A 30 mile, 3-phase transmission line delivers 8,000 kW at 33 kV, p.f. 0.8 lagging. The resistance and reactance of single conductor are 0.6 ohm and 0.72 ohm respectively per mile. Find the percent efficiency of the line.arrow_forwardFor transferring electrical power at 220 kV, six conductors of ACSR Drake constitute a 60Hz double circuit three phase line arranged as shown below. The vertical spacing between consecutive conductors is 14ft; the longer horizontal distance is 32ft whereas the shorter horizontal distance is 25ft. a. Find the inductance per phase per mile and the inductive reactance per phase in ohms per mile. b. Find the capacitive reactance to neutral in ohm-miles. c. Find the resistance per phase per mile in ohms per miles. d. If the length of the line is 90 miles then draw an equivalent circuit of the line and analyse the open circuit and short circuit performance of the line. e. Find the maximum power we can transmit over the line. f. If the line is delivering power to a load of 20MW at 0.8 power factor lagging then find the voltage at the receiving end of the line. Also, Determine the voltage regulation, losses and efficiency of the line. g. If a fixed shunt compensation of 3 MVAr is attached at…arrow_forwardAn AC three phase distribution system (given in Figure 2), which has end user with balanced three phase (10A) load, is given in the figure. The phase-neutral voltages of the transformers are given as V1=224V, V2=225V, V3=228V and V4=231V respectively. a) Calculate phase-neutral voltage of the bus-bar (B). b) Calculate currents of the transformers (I1, I2, I3 and I4) c) Calculate phase-neutral voltage of the point K while the output of TR3 and TR4 (xy) have been short circuited for a transient time (transformers are still operational) by the line fault.arrow_forward
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning