Q4\ The reactance values of the power system illustrated below in per unit on a common baseare as follows.G13.T1T24G2XI(pu)X2(pu)Xo(pu)jo.1jo.1jo.05j0.25jo.25jo.25jo.3j0.3jo.5jo.25j0.25jo.25jo.1jo. 1j0.05Find the fault current for the following faults.a) A single-line-to-ground fault at bus 1.b) A double line to ground fault at bus 1.

L-G Fault: L-G fault is referred as one line to ground fault. For calculation of L-G fault, first we…

Q4\ The reactance values of the power system illustrated below in per unit on a common base are as follows. G1 3. TI T2 4. G2 XI(pu) X2(pu) Xo(pu) jo.1 jo.1 jo.05 jo.25 jo.25 jo.25 jo.3 jo.3 jo.5 j0.25 j0.25 jo.25 jo.1 jo.1 j0.05 Find the fault current for the following faults. a) A single-line-to-ground fault at bus 1. b) A double line to ground fault at bus 1.

Q4\ The reactance values of the power system illustrated below in per unit on a common base are as follows. G1 3. TI T2 4. G2 XI(pu) X2(pu) Xo(pu) jo.1 jo.1 jo.05 jo.25 jo.25 jo.25 jo.3 jo.3 jo.5 j0.25 j0.25 jo.25 jo.1 jo.1 j0.05 Find the fault current for the following faults. a) A single-line-to-ground fault at bus 1. b) A double line to ground fault at bus 1.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter29: Service-entrance Calculations

Section: Chapter Questions

Problem 2R: a. What is the unit load per ft2 for the general lighting load of a residence? ____ b. What are the...

See similar textbooks

Similar questions

Consider 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 to
a. What is the unit load per ft2 for the general lighting load of a residence? ____ b. What are the demand factors for the general lighting load in dwellings? ____
PowerWorid Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06 per unit has been added to the transformer and 0.05 per unit to the transmission line. Since the system is no longer lossless, a field showing the real power losses has also been added to the oneline. With the LTC tap fixed at 1.05, plot the real power losses as the phase shift angle is varied from 10 to +10 degrees. What value of phase shift minimizes the system losses?
Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings given: Generator G1: 50MVA,13.2kV,x=0.15p.u. Generator G2: 20MVA,13.8kV,x=0.15p.u. Three-phase -Y transformer T1: 80MVA,13.2/165YkV,X=0.1p.u. Three-phase Y- transformer T2: 40MVA,165Y/13.8kV,X=0.1p.u. Load: 40MVA,0.8PFlagging,operatingat150kV Choose a base of 100 MVA for the system and 132-kV base in the transmission-line circuit. Let the load be modeled as a parallel combination of resistance and inductance. Neglect transformer phase shifts. Draw a per-phase equivalent circuit of the system showing all impedances in per unit.
The annual load duration curve of a power supply system may be considered as straight line from 40 MW to 8 MW. The load factor of the system is ?
the distribution of loads among the generating units is called as economic dispatch. Select one: True False
The yearly duration curve of a certain plant can be considered as a straight line from 300 MW to 80 MW. Power is supplied with one generating unit of 200 MW capacity and two units of 100 MW capacities each. Determine: Installed Capacity, Load Factor, Plant Factor, Maximum Demand and Utilization Factor.
The yearly load duration curve of a certain power station can be approximated as a straight line; the maximum and minimum loads being 40 MW and 10 MW respectively. To meet this load, three turbine generator units, two rated at 20 MW each and one at 10 MW are installed. Draw the load duration curve and determine: (i) Installed capacity (ii) Plant capacity factor (iii) kWh output per year (iv) Load factor.
How do smart grids and advanced metering infrastructure (AMI) technologies impact the management and optimization of power systems?
Which of the following statements about next-generation wind energy is correct? a. They will have a lower capacity factor than current wind energy. b. Offshore wind energy will be much cheaper than onshore. c. Offshore wind has the potential for a higher capacity factor than onshore installations. d. Integrating offshore wind into existing grid infrastructure is easier than for onshore energy
Incremental fuel costs in dollars per megawatthour for a plant consisting of two units are given by:dC(P)/dP = 0.0080 P1 + 8.0dC(P)/dP = 0.0096 P2 + 6.4Assume that both units are operating at all times, that total load varies from 250 to 1250 MW, and that maximum and minimum loads on each unit are to be 625MW and 100MW respectively. Find the incremental fuel cost and the allocation of load between units for the minimum cost of various total loads.Write your answers in the given format below.
Q4 / Equipment ratings for the four - bus power system shown in Figure are given as follows: TI 73 60 500 Generator GI: 500 MVA, 13.8 KV. X = X2 = 0.20. Xo = 0.10 per unit Generator G2: 750 MVA, 18 KV.X = X2 = 0.18, Xo = 0,09 per unit Generator G3: 1000 MVA, 20 kV, X = 0.17. Xz = 0.20.Xo = 0.09 per unit Transformer Ti: 500 MVA, 13.8 kV A / S00 kV Y. X = 0.12 per unit Transformer T2: 750 MVA, 18 LV A / 500 kV Y, X = 0.10 per unit Transformer T3: 1000 MVA, 20 kV A / 500 kV Y. X = 0.10 per unit each line: X = 50 ohms, X, = 150 ohms 77 The inductor connected to generator G3 neutral has a reactance of 0.028 pu. Draw the zero-, positive-, and negative - sequence reactance diagrams using a 1000 - MVA, 20 - KV base in the zone of generator G3