331
Fault locator (FLOC)
&KDSWHU
0RQLWRULQJ
For a single line, the value is equal to:
(Equation 65)
Thus, the general fault location equation for a single line is:
(Equation 66)
7DEOH ([SUHVVLRQVIRU8$,
$
DQG,
)$
IRUGLIIHUHQWW\SHVRIIDXOWV
The K
N
complex quantity for zero-sequence compensation for the single line is equal
to:
(Equation 67)
∆
I is the change in current, that is the current after the fault minus the current before the
fault.
In the following, the positive sequence impedance for Z
A
, ZB and Z
L
is inserted into
the equations, because this is the value used in the algorithm.
)DXOWW\SH
8$
,
$
,
)$
L1-N
U
L1A
I
L1A
L1-N
U
L1A
I
L1A
+ K
N
x I
NA
L2-N
U
L2A
I
L2A
+ K
N
x I
NA
L1-L2-L3, L1-L2,L1-
L2-N
U
L1A
-U
L2A
I
L1A
- I
L2A
D
A
1
p
–
(
)
Z
⋅
L
Z
B
+
Z
A
Z
L
Z
B
+
+
-----------------------------------------
=
U
A
I
A
p Z
L
I
FA
D
A
--------
R
F
⋅
+
⋅ ⋅
=
3
2
---
∆
I
L1 A
I
0A
–
(
)
×
3
2
---
∆
I
L1 A
I
0A
–
(
)
×
3
2
---
∆
I
L2 A
I
0A
–
(
)
×
∆
I
L 1 L 2 A
K
N
Z
0L
Z
1L
–
2 Z
1L
⋅
------------------------
=
Summary of Contents for REO 517
Page 10: ... RQWHQWV ...
Page 16: ...6 Introduction to the application manual KDSWHU QWURGXFWLRQ ...
Page 64: ...54 Blocking of signals during test KDSWHU RPPRQ IXQFWLRQV ...
Page 88: ...78 Scheme communication logic ZCOM KDSWHU LQH LPSHGDQFH ...
Page 146: ...136 Unbalance protection for capacitor banks TOCC KDSWHU XUUHQW ...
Page 166: ...156 Dead line detection DLD KDSWHU 3RZHU V VWHP VXSHUYLVLRQ ...
Page 378: ...368 Monitoring of DC analog measurements KDSWHU 0RQLWRULQJ ...
Page 384: ...374 Pulse counter logic PC KDSWHU 0HWHULQJ ...
Page 412: ...402 Serial communication modules SCM KDSWHU DWD FRPPXQLFDWLRQ ...
Page 440: ...430 LED indication module KDSWHU DUGZDUH PRGXOHV ...
