w
0
2
p
f
0
× ×
=
EQUATION356 V1 EN
(Equation 19)
where:
Re
designates the real component of current and voltage,
Im
designates the imaginary component of current and voltage and
f
0
designates the rated system frequency
The algorithm calculates
Rm
measured resistance from the equation for the real value
of the voltage and substitute it in the equation for the imaginary part. The equation for
the Xm measured reactance can then be solved. The final result is equal to:
× D
-
× D
=
D
×
- D
×
m
Im (V)
Re (I) Re (V)
lm(I)
R
Re (I) lm(I)
lm(I) Re (I)
EQUATION1550 V1 EN
(Equation 20)
×
-
×
= w
D
×
- D
×
× D ×
m
0
Re (V) lm(I) lm(V) Re (I)
X
Re (I) lm(I)
lm(I) Re (I)
t
EQUATION1551 V1 EN
(Equation 21)
The calculated
R
m
and
X
m
values are updated each sample and compared with the set
zone reach. The adaptive tripping counter counts the number of permissive tripping
results. This effectively removes any influence of errors introduced by the capacitive
voltage transformers or by other factors.
The directional evaluations are performed simultaneously in both forward and reverse
directions, and in all six fault loops. Positive sequence voltage and a phase locked
positive sequence memory voltage are used as a reference. This ensures unlimited
directional sensitivity for faults close to the IED point.
6.2.2.5
Directionality for series compensation
In the basic distance protection function, the control of the memory for polarizing
voltage is performed by an under voltage control. In case of series compensated line, a
voltage reversal can occur with a relatively high voltage also when the memory must
be locked. Thus, a simple undervoltage type of voltage memory control can not be used
in case of voltage reversal. In the option for series compensated network the polarizing
quantity and memory are controlled by an impedance measurement criterion.
Section 6
1MRK505222-UUS C
Impedance protection
204
Technical reference manual
Содержание Relion 670 series
Страница 1: ...Relion 670 series Line differential protection RED670 ANSI Technical reference manual...
Страница 2: ......
Страница 40: ...34...
Страница 50: ...44...
Страница 60: ...54...
Страница 126: ...120...
Страница 384: ...378...
Страница 496: ...490...
Страница 556: ...550...
Страница 602: ...596...
Страница 620: ...614...
Страница 794: ...788...
Страница 864: ...858...
Страница 988: ...982...
Страница 998: ...992...
Страница 1084: ...1078...
Страница 1164: ...1158...
Страница 1168: ...1162...
Страница 1170: ...1MRK002802 AB 1 670 1 2 PG ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1164 Technical reference manual...
Страница 1171: ...1MRK002802 AB 2 670 1 2 PG ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1165 Technical reference manual...
Страница 1172: ...1MRK002802 AB 3 670 1 2 PG ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1166 Technical reference manual...
Страница 1173: ...1MRK002802 AB 4 670 1 2 PG ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1167 Technical reference manual...
Страница 1174: ...1MRK002802 AB 5 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1168 Technical reference manual...
Страница 1175: ...1MRK002802 AB 6 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1169 Technical reference manual...
Страница 1176: ...1MRK002802 AB 7 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1170 Technical reference manual...
Страница 1177: ...1MRK002802 AB 8 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1171 Technical reference manual...
Страница 1178: ...1MRK002802 AB 9 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1172 Technical reference manual...
Страница 1179: ...1MRK002802 AB 10 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1173 Technical reference manual...
Страница 1180: ...1MRK002802 AB 11 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1174 Technical reference manual...
Страница 1181: ...1MRK002802 AB 12 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1175 Technical reference manual...
Страница 1182: ...1MRK002802 AB 13 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1176 Technical reference manual...
Страница 1183: ...1MRK002802 AB 14 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1177 Technical reference manual...
Страница 1184: ...1MRK002802 AB 15 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1178 Technical reference manual...
Страница 1220: ...1214...
Страница 1230: ...1224...
Страница 1231: ...1225...