
1
2
3
_ _ 1
_ _ 2
_ _ 3
_ 2
_ 3
_ _ 1
_ _ 2
_ _ 3
_ 1
_ 1
_ _ 1
_ _ 2
_ _ 3
IDA
I A W
I A W
IL A W
Vn W
Vn W
IDB
A I B W
B I B W
C IL B W
Vn W
Vn W
IDC
I C W
I C W
IL C W
é
ù
é
ù
é
ù
é
ù
ê
ú
ê
ú
ê
ú
ê
ú
= ×
+
× ×
+
× ×
ê
ú
ê
ú
ê
ú
ê
ú
ê
ú
ê
ú
ê
ú
ê
ú
ë
û
ë
û
ë
û
ë
û
4
EQUATION1882-ANSI V1 EN
(Equation 2)
where:
1.
is the resulting Differential Currents
2.
is the current contribution from the W1 side
3.
is the current contribution from the W2 side
4.
is the current contribution from the W3 side
:
ID_A
is the fundamental frequency differential current in phaseA (in W1 side primary amperes)
ID_B
is the fundamental frequency differential current in phase B (in W1 side primary amperes)
ID_C
is the fundamental frequency differential current in phaseC (in W1 side primary amperes)
I_A_W1
is the fundamental frequency phase current in phaseA on the W1 side
I_B_W1
is the fundamental frequency phase current in phaseB on the W1 side
I_C_W1
is the fundamental frequency phase current in phaseC on the W1 side
I_A_W2
is the fundamental frequency phase current in phaseA on the W2 side
I_B_W2
is the fundamental frequency phase current in phase B on the W2 side
I_C_W2
is the fundamental frequency phase current in phase C on the W2 side
I_A_W3
is the fundamental frequency phase current in phase A on the W3 side
I_B_W3
is the fundamental frequency phase current in phaseB on the W3 side
I_C_W3
is the fundamental frequency phase current in phaseC on the W3 side
Vn_W1
is transformer rated phase-to-phase voltage on the W1 side (setting parameter)
Vn_W2
is transformer rated phase-to-phase voltage on the W2 side (setting parameter)
Vn_W3
is transformer rated phase-to-phase voltage on the W3 side (setting parameter)
A, B and C
are three by three matrices with numerical coefficients
Values of the matrix A, B and C coefficients depend on:
1. The Power transformer winding connection type, such as wye (Y/y) or delta (D/d)
•
Note!
The capitalized letter Y or D is used to represent the high voltage (HV)
side of the transformer and the smaller letter y or d to represent lower
voltage(LV) level. When neutral bushing of a wye winding is brought out, the
1MRK 502 048-UUS A
Section 6
Differential protection
93
Technical manual
Содержание 650 series
Страница 1: ...Relion 650 series Generator protection REG650 ANSI Technical manual ...
Страница 2: ......
Страница 44: ...38 ...
Страница 62: ...56 ...
Страница 68: ...62 ...
Страница 156: ...150 ...
Страница 198: ...192 ...
Страница 512: ...506 ...
Страница 644: ...638 ...
Страница 714: ...708 ...
Страница 777: ...771 ...