A 45-MVA, 13.8 kV synchronous machine is operating as a synchronous condenser, as discussed in Appendix D...

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Electrical Engineering

A 45-MVA, 13.8 kV synchronous machine is operating as asynchronous
condenser, as discussed in Appendix D (section D.4.1). Itâ€™sshort-circuit ratio
is 1.68 and the field current at rated voltage, no load is 490 A.Assume the
generator to be connected directly to an 13.8 kV source
a. What is the saturated synchronous reactance of the generatorin per unit
and in ohms per phase?
The generator field current is adjusted to 260 A.
b. Draw a phasor diagram, indicating the terminal voltage, internalvoltage,
and armature current.
c. Calculate the armature current magnitude (per unit and amperes)and its
relative phase angle with respect to the terminal voltage.
d. Under these conditions, does the synchronous condenser appearinductive
or capacitive to the 11.5 kV system?

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3.9 Ratings (711 Votes)

Short circuit ratio is given asSingle phase rated voltage is given bySingle phase rated power is given byNow base value of impedance isNow base value See Answer

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