For a three-phase fault at the spark location shown in the figure below with all equipment three-phase
Question:
For a three-phase fault at the spark location shown in the figure below with all equipment three-phase and generator of finite size, determine the symmetrical rms fault current. Ignore the series resistance (but not the reactance) of the transformer and the generator. Assume all cables short with negligible R and X, and follow the following steps:
(1) As is commonly done by power engineers, convert the system to % values based on the kilovolt-ampere and voltage ratings of the transformer feeding the fault. Then, determine the fault current in amperes at the fault location and also at the generator terminals using the voltage ratio.
(2) Repeat the calculation by converting the system to % Z values based on the kilovolt-ampere and voltage ratings of the generator, and then determine the fault current in amperes at the generator and the transformer terminals and compare it with (1).
Step by Step Answer:
Introduction To Electrical Power And Power Electronics
ISBN: 9781466556607
1st Edition
Authors: Mukund R. Patel