8-2
D60 Line Distance Protection System
GE Multilin
8.1 DISTANCE ELEMENTS
8 THEORY OF OPERATION
8
8.1.3 DISTANCE CHARACTERISTICS
a) DEFINITIONS
The relay shapes its distance characteristics using phase angle comparators and voltage and current phasors estimated as
described in the previous section.
The following definitions pertain to all of the distance functions:
•
I
A
, I
B
, I
C
: phase A, B, and C current phasors.
•
I
G
: ground current from a parallel line.
•
V
A
, V
B
, V
C
: phase A to ground, phase B to ground, and phase C to ground voltage phasors.
•
( )_1: positive-sequence phasor of ( ) derived from the phase quantities.
•
( )_2: negative-sequence phasor of ( ) derived from the phase quantities.
•
( )_0: zero-sequence phasor of ( ) derived from the phase quantities.
•
( )M: memorized value of ( ).
•
Z: reach impedance (
REACH
RCA
).
•
Z
REV:
reverse reach impedance for non-directional applications (
REV REACH
REV REACH RCA
+ 180°).
•
Z
D
: directional characteristic impedance (1
DIR RCA
).
•
Z
R
: right blinder characteristic impedance: Z
R
=
RGT BLD
sin (
RGT BLD
RCA
)
1
(
RGT BLD RCA
– 90°).
•
Z
L
: left blinder characteristic impedance: Z
L
=
LFT BLD
sin (
LFT BLD
RCA
)
1
(
LFT BLD RCA
+ 90°).
•
K0: zero-sequence compensating factor: K0 = (
Z0/Z1 MAG
Z0/Z1 ANG
) – 1.
•
K0M: mutual zero-sequence compensating factor: K0M = 1/3 x
Z0M/Z1 MAG
Z0M/Z1 ANG
.
•
: non-homogeneity angle setting (
NON-HOMOGEN ANG
).
b) DIRECTIONAL MHO CHARACTERISTIC
The dynamic 100% memory polarized mho characteristic is achieved by checking the angle between:
•
AB phase element: (I
A
– I
B
)
Z – (V
A
– V
B
)
and
(V
A
– V
B
)_1M
•
BC phase element: (I
B
– I
C
)
Z – (V
B
– V
C
)
and
(V
B
– V
C
)_1M
•
CA phase element: (I
C
– I
A
)
Z – (V
C
– V
A
)
and
(V
C
– V
A
)_1M
•
A ground element: I
A
Z + I_0
K0
Z + I
G
K0M
Z – V
A
and
V
A
_1M
•
B ground element: I
B
Z + I_0
K0
Z + I
G
K0M
Z – V
B
and
V
B
_1M
•
C ground element: I
C
Z + I_0
K0
Z + I
G
K0M
Z – V
C
and
V
C
_1M
The limit angle of the comparator is adjustable enabling the user to shape the characteristic as a mho or a lens as shown in
the figures below.The memory-polarized mho characteristic has an excellent directional integrity built-in as explained in the
Memory polarization
section.
Содержание D60
Страница 61: ...GE Multilin D60 Line Distance Protection System 2 31 2 PRODUCT DESCRIPTION 2 3 SPECIFICATIONS 2 ...
Страница 62: ...2 32 D60 Line Distance Protection System GE Multilin 2 3 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 102: ...3 40 D60 Line Distance Protection System GE Multilin 3 3 DIRECT INPUT AND OUTPUT COMMUNICATIONS 3 HARDWARE 3 ...
Страница 134: ...4 32 D60 Line Distance Protection System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 508: ...5 374 D60 Line Distance Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 538: ...6 30 D60 Line Distance Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 610: ...10 8 D60 Line Distance Protection System GE Multilin 10 2 BATTERIES 10 MAINTENANCE 10 ...
Страница 622: ...A 12 D60 Line Distance Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 745: ...GE Multilin D60 Line Distance Protection System B 123 APPENDIX B B 4 MEMORY MAPPING B ...
Страница 746: ...B 124 D60 Line Distance Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 776: ...C 30 D60 Line Distance Protection System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 792: ...E 10 D60 Line Distance Protection System GE Multilin E 1 IEC 60870 5 104 PROTOCOL APPENDIX E E ...
Страница 804: ...F 12 D60 Line Distance Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Страница 826: ...xii D60 Line Distance Protection System GE Multilin INDEX ...
