GE D90 Plus, Инструкция по эксплуатации, Страница: 645 / 694

CHAPTER 15: THEORY OF OPERATION THE D90
Plus
DISTANCE ELEMENTS
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 635
Table 15-13: Directional quadrilateral phase distance functions
Table 15-14: Directional quadrilateral ground distance functions
Table 15-15: Non-directional mho phase distance functions
Table 15-16: Non-directional mho ground distance functions
Table 15-17: Non-directional quadrilateral phase distance functions
Zero-sequence I _0 × Z
D
– V _0 90° (zones 2 and 3 only; removed during open
pole conditions)
Characteristic Comparator inputs Limit angle
Input 1 Input 2
Reactance I × Z – V I × Z Comparator limit
Directional I × Z
D
V _1M Directional comparator limit
Right blinder I × Z
R
– V I × Z
R
90°
Left blinder I × Z
L
– V I × Z
L
90°
Characteristic Comparator inputs Limit angle
Input 1 Input 2
Reactance I × Z – V j × I _0 × e
j Θ
or j × I _2 × e
j Θ
Comparator limit
Directional I _0 × Z
D
V _1M Directional comparator limit
I _2 × Z
D
V _1M Directional comparator limit (removed when
3I_0 > overcurrent supervision and I_2 < cutoff)
Right blinder I × Z
R
– V I × Z
R
90°
Left blinder I × Z
L
– V I × Z
L
90°
Fault type I _0 I _2 50° (removed during open pole conditions or
when 3I_0 > overcurrent supervision and
I_2 < cutoff)
Zero-sequence I _0 × Z
D
– V _0 90° (zones 2 and 3 only; removed during open
pole conditions)
Characteristic Comparator inputs Limit angle
Input 1 Input 2
Offset mho I × Z – V I × Z
REV
– V Comparator limit
Characteristic Comparator inputs Limit angle
Input 1 Input 2
Offset mho I × Z – V I × Z
REV
– V Comparator limit
Fault type I _0 I _2 50° (removed during open pole conditions or
when 3I_0 > overcurrent supervision and
I_2 < cutoff)
Characteristic Comparator inputs Limit angle
Input 1 Input 2
Forward reactance I × Z – V I × Z Comparator limit
Reverse reactance I × Z
REV
– V I × Z
REV
Comparator limit
Right blinder I × Z
R
– V I × Z
R
90°
Left blinder I × Z
L
– V I × Z
L
90°
Characteristic Comparator inputs Limit angle
Input 1 Input 2