ABB RELION 650 SERIES, Техническое руководство, Страница: 635 / 942

D
A
1 p –
( )
Z
A
Z
A L
Z
B
+ +
( )
Z
B
+
×
2 Z
A
Z
L
2 Z
B
×
+ +
×
-----------------------------------------------------------------------------
=
EQUATION101 V1 EN-US
(Equation 85)
The K
N
compensation factor for the double line becomes:
K
N
Z
0L
Z
1L
–
3 Z
1L
×
------------------------
Z
0M
3 Z
1L
×
-----------------
I
0P
I
0A
-------
×
+ =
EQUATION102 V1 EN-US
(Equation 86)
From these equations it can be seen, that, if Z
0m
= 0, then the general fault location
equation for a single line is obtained. Only the distribution factor differs in these
two cases.
Because the D
A
distribution factor according to equation 82 or 84 is a function of
p, the general equation 84 can be written in the form:
p
2
p K
1
K
2
K
3
R
F
×
– +
×
– 0 =
EQUATION103 V1 EN-US
(Equation 87)
Where:
K
1
U
A
I
A
Z
L
×
----------------
Z
B
Z
L
Z
A DD
+
---------------------------
1 + + =
EQUATION104 V1 EN-US
(Equation 88)
K
2
U
A
I
A
Z
L
×
----------------
Z
B
Z
L
Z
A DD
+
---------------------------
1 +
è ø
æ ö
×
=
EQUATION105 V1 EN-US
(Equation 89)
K
3
I
FA
I
A
Z
L
×
----------------
Z
A
Z
B
+
Z
1
Z
A DD
+
--------------------------- 1 +
è ø
æ ö
×
=
EQUATION106 V1 EN-US
(Equation 90)
and:
• Z
ADD
= Z
A
+ Z
B
for parallel lines.
• I
A
, I
FA
and U
A
are given in the above table.
• K
N
is calculated automatically according to equation 86 .
• Z
A
, Z
B
, Z
L
, Z
0L
and Z
0M
are setting parameters.
For a single line, Z
0M
= 0 and Z
ADD
= 0. Thus, equation 87 applies to both single
and parallel lines.
Equation 87 can be divided into real and imaginary parts:
1MRK 506 382-UEN A
Section 14
Monitoring
Line distance protection REL650 2.2 IEC 629
Technical manual