Question 3 4:28←EEC420_2022_Mih_... QFFC420 Assignment1. A 200-km, 230-kV. 60-Hz three-phase line has a positive-sequence series impedance z= 0:00 +10:48n/km and a positive-sequence shunt admittance y 13:33 µS/km. At full load, the line delivers 250 MW at0.99 p.t. lagging and at 220 kV. Using the nominal x circuit, calculate: (a) the ABCD parameters, (b) thesending end voltage and current, and (c) the percent voltage regulation2. The 500-kv, 60-Hz three-phase completely transposed overhead line having three ACSR 1113-kemil(556.50 mm) conductors per bundle, with 0.5 m between conductors in the bundle. The horizontalphase spacings between bundle centers are 10, 10, and 20 m. has a 300-km length. Calculate (a) Z. (b) y/and (c) the exact ABCD parameters for this line. Assume a 50°C conductor temperature Note: TheAluminum Electrical Conductor Handbook lists a de resistance of 0.01558 ohm per 1000 ft (or 0.05112ohm per km) at 20°C and a 60-Hz resistance of 0.0956 ohm per mile (or 0.0994 ohm per km) at 50°C forthe all-aluminum Marigold conductor, which has 61 strands and whose size is 564 mm2 or 1113 kcmil.3. A 230-kV, 100-km, 60-Hz three-phase overhead transmission line with a rated current of 900 A/phasehas a series impedance z 0:088 +10:465 /km and a shunt admittance y-3.524 m5/km. (a) Obtainthe nominal a equivalent circuit in normal units and in per unit on a base of 100 MVA (three phase) and230 kV (line-to-line). (b) Determine the three-phase rated MVA of the Ine. (c) Compute the ABCDparameters (d) Calculate the SIL4. Consider the simplified electric power system shown below for which the power flow solution can beobtained without resorting to iterative techniques. (a) Compute the elements of the bus admittancematrix Y. (b) Calculate the phase angle 82 by using the real power equation at bus 2 (voltage-controlled bus). (c) Determine V₂ and 63 by using both the real and reactive power equations at bus 3(load bus). (d) Find the real power generated at bus 1 (swing bus). (e) Evaluate the total real powerlosses in the system.V. -1/0P.-1.5 puIV,1-1,1 pY-2-j4Y-3-16P,-1.5 pQ-+0.8Page 1 of 25. The bus admittance matrix of a three-bus power system is given by[7 -2Yu-2 6-4 per unit-5-49-&1with V,1.020 per unit: V₂ = 1.0 per unit; P2 = 60 MW; P380 MW: 03-60 MVAR (lagging) as apart of the power-flow solution of the system, find V2 and V3 within a tolerance of 0.01 per unit, byusing Gauss-Seidel iteration method. Start with 82-0, V3-1.0 per unit, and 83-06. For a three bus power system assume bus 1 is the swing with a per unit voltage of 1.020, bus 2 is a PQbus with a per unit load of 2.0+ 0:5, and bus 3 is a PV bus with 10 per unit generation and a 1.0voltage setpoint. The per unit line impedances are j0.1 between buses 1 and 2. 10.4 between buses 1 and3, and 10.2 between buses 2 and 3. Using a flat start, use the Newton-Raphson approach to determine thefirst iteration phasor voltages at buses 2 and 3.7. The figure below is a single line diagram of a three-bus power system. Bus 3 is a PV bus(n) Using G-S method and initial assumed voltage V1.0+ 0.0 and V1.03+0.0, andkeeping |V₂|103 pu, determine V₂ and Vs Perform two iterations.(b) Calculate line flows and line losses.(c) Calculate slock bus power.V, 1.025 0P, 200 MW20.045~ 1IVJ=1.032390 MW 190 MVA8. Solve problem 7 above using Decoupled N-R method. Perform two iterations only.o0.020to0.020

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