Breaking News: Grepper is joining You.com. Read the official announcement!

A 13.8kV, 100 MW, 125 MVA generator having a positive sequence impedance of j28.0% and a negative sequence impedance of j22.4% is connected to a 13.8/275 kV, 125 MVA delta/star step-up transformer having an impedance of j15.0%, the 275kV neutral point of

MAWULI DOGBATSE answered on April 3, 2023 Popularity 1/10 Helpfulness 1/10

answer A 13.8kV, 100 MW, 125 MVA generator having a positive sequence impedance of j28.0% and a negative sequence impedance of j22.4% is connected to a 13.8/275 kV, 125 MVA delta/star step-up transformer having an impedance of j15.0%, the 275kV neutral point of

A 13.8kV, 100 MW, 125 MVA generator having a positive sequence impedance of j28.0% and a negative sequence impedance of j22.4% is connected to a 13.8/275 kV, 125 MVA delta/star step-up transformer having an impedance of j15.0%, the 275kV neutral point of

Comment

A 13.8kV, 100MW, 125MVA generator having a positive sequence impedance of j28.0% and a negative sequence impedance of j22.4% is connected to a 13.8/275 kV, 125MVA delta/star step-up transformer having an impedance of j15.0%, the 275kV neutral point of the latter being solidly earthed.
(i) Draw the sequence network connections for a phase-to-ground fault at the 275kV terminals of the transformer
(ii) For the phase-phase fault at the 275kV terminals of the transformer, determine the values of the phase currents at the point of fault.
The pre-fault phase-phase voltage at the point of fault can be assumed to be equal to the rated value of 275kV.
The 275kV circuit breaker is assumed to be open (i.e. there is no fault current infeed from the 275kV system)
Assume base values of 125MVA and 275kV.

Popularity 1/10 Helpfulness 1/10 Language typescript

Source: Grepper

Tags: generator having point sequence typescript

Link to this answer
Share Copy Link

Contributed on Apr 03 2023

MAWULI DOGBATSE

0 Answers Avg Quality 2/10

A 13.8kV, 100 MW, 125 MVA generator having a positive sequence impedance of j28.0% and a negative sequence impedance of j22.4% is connected to a 13.8/275 kV, 125 MVA delta/star step-up transformer having an impedance of j15.0%, the 275kV neutral point of

Contents

More Related Answers

A 13.8kV, 100 MW, 125 MVA generator having a positive sequence impedance of j28.0% and a negative sequence impedance of j22.4% is connected to a 13.8/275 kV, 125 MVA delta/star step-up transformer having an impedance of j15.0%, the 275kV neutral point of

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.