1MAC050144-MB C
Section 9
Recording functions
615 series ANSI
611
Technical Manual
Table 515: Fault identification
Once the specific fault type is determined, the respective fault loop voltage and current
phasor are taken for fault location algorithm.
If the fault is any single phase to ground fault, then the respective phase current should be
ground compensated.
The procedure for the ground compensation is given below,
For ground fault cases, the current measured at the relay is ground compensated by
employing the following formula:
Equation (76)
where
Equation (77)
k
= 1.0 (scaling factor)
ZL
pos
and ZL
zero
refer to positive and zero sequence line impedances.
ZL
pos
= RL
pos
+ j*XL
pos
ZL
zero
= RL
zero
+ j*XL
zero
RL
pos
=
PosSeqR
*
LinLen
XL
pos
=
PosSeqX
*
LinLen
RL
zero
=
ZeroSeqR
*
LinLen
XL
zero
=
ZeroSeqX
*
LinLen
= Ground compensated phase current
= Non-compensated phase current
Fault in phase A
Fault in phase B
Fault in phase C
Fault in ground (Io)
FLTLOOP
FLTLOOP
1
0
0
1
AG Fault
1
0
1
0
1
BG Fault
2
0
0
1
1
CG Fault
3
1
1
0
0
AB Fault
4
0
1
1
0
BC Fault
5
1
0
1
0
CA Fault
6
1
1
1
0
ABC Fault
7
1
1
0
1
ABG Fault
-1
0
1
1
1
BCG Fault
-2
1
0
1
1
CAG Fault
-3
1
1
1
1
ABCG Fault
-4
0
0
0
0
No Fault
0
pos
pos
zero
rly
rly
ZL
ZL
ZL
I
k
I
I
/
)
(
*
*
0
*
3
/
)
_
_
_
(
0
C
I
B
I
A
I
I
*
rly
I
rly
I
Содержание 615 Series ANSI
Страница 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Страница 2: ......
Страница 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Страница 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Страница 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Страница 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Страница 707: ...Section 15 1MAC050144 MB C Applicable standards and regulations 700 615 series ANSI Technical Manual ...
Страница 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
Страница 712: ......