Generator Temperature Rise Test

Generator Temperature Rise Test

From a few days, we have made a test on the Generator’s windings (Stator and Rotor), this test accomplish the temperature rise of the windings at full load is within the Normal range.

First, we increased the load to full load (350 MW), then increased the reactive power and the terminal voltage at about (19.7 KV).

1) Procedure for stator winding.

-Apply the following formulae, after you collect the data every 30 minutes.

T_s = ( T_st – T_s1 ) * ( I_n / I_b )²  + T_s1

T_{st =}   Actual stator winding temp. – Avg. cold gas temp

T_s1=   Factory test value = 4.4

I_{n =}      Factory test value = 13.37

I_{b =}      Max. Current value

2) Procedure for rotor winding.

-Apply the following formulae, after you collect the data every 30 minutes.

T_f =  T_ft * ( I_fn / I_ft )²

T_{ft =}    Actual rotor winding temp. – Avg. cold gas temp

I_{fn =}     Factory test value = 2945

I_{ft =}      Actual Current value

T_s and T_f , should be at the normal levels , at full load