1. The open circuit characteristic of a 3-phase 10 MVA, 13 kV, 50 Hz, Star connected synchronous generator is as follows: It (A) 50 75 100 125 150 162.5 200 250 300 Voc (L-L) 6.2 8.7 10.5 11.8 12.8 13.2 14.2 15.2 15.9 (kV) An excitation of 100A causes the full load current to flow during the short-circuit test. Calculate the saturated synchronous reactance and the corresponding Short- Circuit Ratio (SCR). Assume resistance is neglected. Base impedance =10 Ohms.
1. The open circuit characteristic of a 3-phase 10 MVA, 13 kV, 50 Hz, Star connected synchronous generator is as follows: It (A) 50 75 100 125 150 162.5 200 250 300 Voc (L-L) 6.2 8.7 10.5 11.8 12.8 13.2 14.2 15.2 15.9 (kV) An excitation of 100A causes the full load current to flow during the short-circuit test. Calculate the saturated synchronous reactance and the corresponding Short- Circuit Ratio (SCR). Assume resistance is neglected. Base impedance =10 Ohms.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
Question
Transcribed Image Text:1. The open circuit characteristic of a 3-phase 10 MVA, 13 kV, 50 Hz, Star connected
synchronous generator is as follows:
If (A)
50
75
100
125
150
162.5
200
250
300
Voc (L-L)
6.2
8.7
10.5
11.8
12.8
13.2
14.2
15.2
15.9
(kV)
An excitation of 100A causes the full load current to flow during the short-circuit
test. Calculate the saturated synchronous reactance and the corresponding Short-
Circuit Ratio (SCR). Assume resistance is neglected. Base impedance =10 Ohms.
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