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Typical value of Xd in AC generators

Typical value of Xd in AC generators

Typical value of Xd in AC generators

(OP)
Can any one tell me the typical value of Xd of an AC hydro-generator with the following data:

750RPM, 1.7MW, PF=0.9,6.3kV

Generally I want to know the criteria for selection of Xd or in other words teh SCR of the AC generators?

RE: Typical value of Xd in AC generators

you can use:

Xd-synch: Avg: 1.25 Range: 0.6-1.5
Xd-transient: Avg: 0.3 Range: 0.2-0.5
Xd-subtransient: Avg: 0.2 Range: 0.13-0.32 (with dampers)
Xd-subtransient: Avg: 0.3 Range: 0.2-0.5 (without dampers)

All in p.u. in rated kVA base.

RE: Typical value of Xd in AC generators

Typical reactance of hydro-gen are:
      a-Without damper winding……………..16 (16-50)%
      b-With damper wedges …………………20(13-32)%

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