3 A three phase power system has two generator connected in parallel to a transformer and subsequently to a 230 kV transmission line. The ratings for the components are given as below: Generator 1:10 MVA, reactance of 12%. Generator 2: 5 MVA, reactance of 8%. Transformer: 15 MVA, reactance of 6% Transmission line: impedance of 4+j60 2, for which the reactances in percentage are based on the ratings of the respective components. Obtain the reactance and impedance values of the components in the custom in naroontogo bocad on 15 MYA and rotad Jtage of the nomponente

3 A three phase power system has two generator connected in parallel to a transformer and subsequently to a 230 kV transmission line. The ratings for the components are given as below: Generator 1:10 MVA, reactance of 12%. Generator 2: 5 MVA, reactance of 8%. Transformer: 15 MVA, reactance of 6% Transmission line: impedance of 4+j60 2, for which the reactances in percentage are based on the ratings of the respective components. Obtain the reactance and impedance values of the components in the custom in naroontogo bocad on 15 MYA and rotad Jtage of the nomponente

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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3.8. Three identical 9-MVA, 7.2-kV/4.16-kV, single-phase transformers are con- nected in wye on the high-voltage side and delta on the low voltage side. The equivalent series impedance of each transformer referred to the high-voltage side is 0.12 + j0.82 S per phase. The transformer supplies a balanced three- phase load of 18 MVA, 0.8 power factor lagging at 4.16 kV. Determine the line-to-line voltage at the high-voltage terminals of the transformer.
1. A single-phase power system as shown in Figure 1 consists of a 240 V, 60 Hz generator supplying a load, Zod = 8 + j6 Q through a transmission line of impedance, Zne = 0.08 + j0.14 Q. Answer the following questions: (1) transformer, T; and T2. Determine the voltage at the load and transmission line losses without the (ii) Determine the voltage at the load and transmission line losses with the transformer, T, and T2. T1 T2 1:10 10:1 IG Zaine Zioad source Figure 1
Number 17
A 4-bus three-phase power system consists of the following equipment: • Generator 1 connected to bus 1 with a rated power of 20MVA, rated voltage of 20 kV, and a series reactance of 0.4 p.u. • Generator 2 connected to bus 5, with a rated power of 12MVA, rated voltage of 10 kV, and a series reactance of 0.3 p.u. Transformer 1 connected between buses 1 and 2, is wye-wye connected with a rated power of 20 MVA, rated voltages 20/100 kV, and a series reactance of 0.1 p.u. • Transformer 2 connected between buses 4 and 5, is wye-wye connected with a rated power of 12 MVA, rated voltages 12/110 kV, and a series reactance of 0.15 p.u. • Transmission Line 2-3 connects buses 2 and 3 and had a series impedance of 50 + j75 ohms. • Transmission Line 3-4 connects buses 3 and 4 and had a series impedance of 40 + j80 ohms. • Load A connected to bus 3 and abosorbes20 MW and 10 MVAR. The voltage at bus 3 is 105 kV. 1) Draw the one-line diagram for the system. 2) Draw the per-unit, per phase…
A 12 MVA, 132/6.6 kV, transformer having a reactance of 0.15 pu is fed from an infinite bus. The transformer feeds two motor each 6 MVA, 6.6 kV. Each motors has a transient reactance of 0.14 pu and a subtransient reactance of 0.30 pu based on its own rating. A three phase balanced fault occurs at the terminals of one motor as shown in the figure below. Find the subtransient fault current and subtransient current in breaker. M1) 132/6.6 KV СВ 38 CB Infinite Bus M2 Fault
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There is a three-phase system such that the phase current in the generator, lines and charging phase is the same. The phase voltage in the generator must be 1000 [V] with clockwise sequence. The connected load must be such that the phase current in each load is 10 [A] and its power factor is 0.97 “lagging”. a) Determine phase currents in the generator, lines and phase in the load
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