GE DGP Series, Instruction Manual

Page: 42 / 278

2-
2
DGP Digital Generator Protection System GE Power Management
2.1 GENERAL 2 CALCULATION OF SETTINGS
2
Figure 2–1: SAMPLE GENERATOR SYSTEM
Power System
5 2 G
GSU Transformer
200 MVA
18 : 138 KV
X1 = 10%
G
I
2
8 0 0 0 : 5 A
8 0 0 0 : 5 A
1 2 0 0 0 : 2 4 0 V
1 . 4 5 O h m
1 8 9 0 0 : 1 2 0 V
DGP Protection System
VA, VB, VC
IAS, IBS, ICS, INS
IAR, IBR, ICR, INR
V N
9 4 G
9 4 G 1
9 4 G 2
9 4 G 3
Configurable
Outputs
T o
Trip
Circuits
7 4 A
7 4 B
7 4 C
7 4 D
T o
A l a r m
Circuits
Generator
211,765 KVA, 18KV
X'd = 0.216 PU
Xd = 1.967 PU
T capability = 10
capability = 8%
Motoring power = 22000 KW
I
2
2
S A M P G E N . V S D