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6-8
G650 Generator Protection & Control System
GEK-113328A
6.7 VERIFICATION OF MEASUREMENT 6
COMMISSIONING
6
6.7.3 ACTIVE, REACTIVE POWER, AND COS
ϑ
METERING
Equations to be applied for powers in a wye connection are as follows:
Apply the following current and voltage values:
With the indicated voltage and current values, verify that the power measure corresponds to expected values indicated in
the following table:
Maximum admissible error is ± 1% of the test value for P and Q, and 0.02 for cos
ϕ
.
6.7.4 FREQUENCY
Frequency measure on channel VII (terminals A7-A8):
Apply 50 Vac at 50 Hz on channel VII. Maximum admissible error:± 10 mHz.
Apply 50 Vac at 60 Hz on channel VII. Maximum admissible error: ± 12 mHz.
Frequency measure on channel Vx (terminals A11-A12):
Apply 50 Vac at 50 Hz on channel Vx. Maximum admissible error:± 10 mHz.
Apply 50 Vac at 60 Hz on channel Vx. Maximum admissible error: ± 12 mHz.
Results:
POWER PER PHASE
THREE-PHASE POWER
P=V*I*Cos
ϕ
P=Pa+Pb+Pc
Q=V*I*Sen
ϕ
Q=Qa+Qb+Qc
APPLIED VOLTAGE AND CURRENT VALUES PER PHASE
PHASE A
PHASE B
PHASE C
V-I ANGLES
VI = 50 V, 0º
VII = 50 V , 120º
VIII = 50V, 240º
ϕ
=45º
Ia = 10
∠
45º
Ib= 10
∠
165º
Ic = 10
∠
285º
Cos
ϕ
= 0.707
EXPECTED POWER VALUES
PHASE A
PHASE B
PHASE C
THREE-PHASE
Pa = 353.55 MW
Pb = 353.55 MW
Pc = 353.55 MW
P = 1060.66 MW
Qa = 353.55 MVAr
Qb = 353.55 MVAr
Qc = 353.55 MVAr
Q = 1060.66 MVAr
CHANNEL
VOLTAGE (V)
SET FREQUENCY (HZ)
MEASURED FREQUENCY (HZ)
VII
50
50 Hz
60 Hz
VX
50
50 Hz
60 Hz
Содержание Multilin GEK-113328A
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