edison123
Electrical
- Oct 23, 2002
- 4,462
A 11 KV, 25 MW hydro generator was refurbished with new stator & rotor windings along with replacement of old rotating dc exciter with static exciter. As a pre-commissioning requirement, Gen. OCC & SCC tests have to be done for which excitation is required.
After isolating the generator from the 11 KV bus, can we back charge the Generator Transformer (GT is rated 11 KV / 132 KV, 28 MVA) to avail the 11 KV supply for the static exciter transformer ? Any possible problems because of reverse power flow in the GT ? Total excitation requirement is about 100 KW.
We will be bypassing the reverse power protection during these tests.
After isolating the generator from the 11 KV bus, can we back charge the Generator Transformer (GT is rated 11 KV / 132 KV, 28 MVA) to avail the 11 KV supply for the static exciter transformer ? Any possible problems because of reverse power flow in the GT ? Total excitation requirement is about 100 KW.
We will be bypassing the reverse power protection during these tests.