ABB REG316 4 Series Operating Instructions Manual page 88

ABB Switzerland Ltd
Example:
The compensation for the currents of a three-winding trans-
former Yd5y0 is as follows:
s1 = Y
s2 = d5
s3 = y0
compensation matrix
for winding 1
compensation matrix
for winding 2
compensation matrix
for winding 3
The function currents then become:
Function currents (calculated)
æ ö
I
r 1
ç ÷
I
ç ÷
Winding 1:
s 1
ç ÷
è I ø
t 1
æ ö
I
r 2
ç ÷
I
ç ÷
Winding 2:
s 2
ç ÷
è ø
I
t 2
æ ö
I
r 3
ç ÷
I
ç ÷
Winding 3:
s 3
ç ÷
è I ø
t 3
3-50
REG 316*4 1MRB520049-Uen / Rev. F
CBC results from Table
= C = (1 -1 0)
with an amplitude factor of
= B = (-1 0 0)
with an amplitude factor of 1
= C = (1 -1 0)
with an amplitude factor of
æ
ç
1
=
ç
3
ç
è
æ
ç
=
1
ç
ç
è
æ
ç
1
=
ç
3
ç
è
3.5.1.2, i.e. the
(see Table 3.5.1.1)
(see Table 3.5.1.1)
(see Table 3.5.1.1)
Currents measured at
the c.t's
ö æ ö
-
1 1 0 I
R 1
÷ ç ÷
-
0 1 1 I
ç ÷
÷
S 1
÷
ç ÷
- ø
1 0 1 è I ø
T 1
æ ö
ö
-
1 0 0 I
R 2
÷ ç ÷
-
0 1 0 I
ç ÷
÷
S 2
÷ ç ÷
- ø è ø
0 0 1 I
T 2
æ ö
- ö
1 1 0 I
R 3
÷ ç ÷
-
0 1 1 I
ç ÷
÷
S 3
÷ ç ÷
-
1 0 1 ø è I ø
T 3
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