Setting Of Reach In Resistive Direction - ABB RELION 670 SERIES Applications Manual

1MRK 506 369-UUS -
8.9.3.6
Line distance protection REL670 2.2 ANSI
Application manual
Z 0
m
= -
K 0 1
× + +
2 Z 1 Z 0 R
f
EQUATION1426 V1 EN
If the denominator in equation
and imaginary part of the reach reduction factor for the overreaching zones can be written
as:
( )
×
X m 0 Re
( )
= -
Re K 0 1
( )
2
+
Re B Im
EQUATION1427 V2 EN
( )
×
( ) X m 0 Im
=
Im K 0
( )
2
+
Re B Im
EQUATION1428 V2 EN
Parallel line is out of service and grounded in both ends
Apply the same measures as in the case with a single set of setting parameters. This means
that an underreaching zone must not overreach the end of a protected circuit for the single
phase-to-ground faults.
Set the values of the corresponding zone (zero-sequence resistance and reactance) equal
to:
2
æ
X
m0
×
ç ------------------------- -
R = R 1 +
0E 0
2
è
R + X
0 0
EQUATION561 V1 EN
2
æ
X
m0
×
------------------------- -
X = X ç 1 –
0E 0
2 2
è
R + X
0 0
EQUATION562 V1 EN

Setting of reach in resistive direction

Set the resistive independently for each zone.
Set separately the expected fault resistance for phase-to-phase faults RFPP and for the
phase-to-ground faults RFPG for each zone. For each distance zone, set all remaining
reach setting parameters independently of each other.
134 is called B and Z0m is simplified to X0m, then the real
B
( )
2
B
B
( )
2
B
ö
÷
2
ø
ö
÷
ø
Section 8
Impedance protection
(Equation 256)
(Equation 257)
(Equation 258)
(Equation 259)
(Equation 260)
329