6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 27 -
impedance and negative-sequence impedance are the same and that the influences of the fault
resistance are ignored.
𝑉
1
= 𝑍
1
× 𝐼
1
+ 𝑉
1
𝐹
(2.1-7)
𝑉
2
= 𝑍
1
× 𝐼
2
+ 𝑉
2
𝐹
(2.1-8)
𝑉
0
= 𝑍
0
× 𝐼
0
+ 𝑍
0
𝑚 × 𝐼
0
𝑚 + 𝑉
0
𝐹
(2.1-9)
where,
V
1
:
Relay point positive-sequence voltage
V
2
:
Relay point negative-sequence voltage
V
0
:
Relay point zero-sequence voltage
V
1
F:
Fault point positive-sequence voltage
V
2
F:
Fault point negative-sequence voltage
V
0
F:
Fault point zero-sequence voltage
I
1
:
Relay point positive-sequence current
I
2
:
Relay point negative-sequence current
I
0
:
Relay point zero-sequence current
I
0
m:
Adjacent line zero-sequence current
Z
1
:
Fault point - relay point positive-sequence impedance
Z
0
:
Fault point - relay point zero-sequence impedance
Z
0
m:
Adjacent line zero-sequence mutual impedance
Considering the faulted phase voltage VaF at the point of fault is,
𝑉
𝑎
𝐹 = 𝑉
1
𝐹 + 𝑉
2
𝐹 + 𝑉
0
𝐹 = 0
(2.1-10)
Phase-A voltage Va at the relay is calculated from the following equation:
𝑉
𝑎
= 𝑉
1
+ 𝑉
2
+ 𝑉
0
= 𝑍
1
(𝐼
𝑎
+
𝑍
0
− 𝑍
1
𝑍
1
× 𝐼
0
+
𝑍
𝑚0
𝑍
1
× 𝐼
0𝑚
)
(2.1-11)
Where, Ia is the current of phase-A at the relay and is defined in the following equation
by the symmetrical component of the current:
𝐼
𝑎
= 𝐼
1
+ 𝐼
2
+ 𝐼
0
(2.1-12)
Here, defining the current synthesized using the phase-A current at the relay as Ia', and
I
a
′
= 𝐼
𝑎
+
(𝑍
0
− 𝑍
1
)
𝑍
1
× 𝐼
0
+ 𝑍
0
𝑚/𝑍
1
× 𝐼
0
𝑚
(2.1-13)
Then equation (2.1-11) can be re-written in the following form:
Содержание GR 200 Series
Страница 1047: ...6F2S1915 0 46 GRZ200 Soft 031 032 1026 Figure 8 3 4 Screen shot from GR TIEMS ...
Страница 1354: ...6F2S1915 0 46 GRZ200 Soft 031 032 1333 Appendix 1 Signal list for common function ...
Страница 1369: ...6F2S1915 0 46 GRZ200 Soft 031 032 1348 Unit mm Panel cut out for 1 2 case size Figure 2 2 3 Panel cutout figure 1 2 size case ...
Страница 1410: ...6F2S1915 0 46 GRZ200 Soft 031 032 1389 This page is intentionally blank ...
Страница 1480: ...6F2S1915 0 46 GRZ200 Soft 031 032 1459 Appendix 6 Ordering ...
Страница 1497: ...6F2S1915 0 46 GRZ200 Soft 031 032 1476 Appendix 7 Technical data ...
Страница 1518: ...6F2S1915 0 46 GRZ200 Soft 031 032 1497 Appendix 8 Manufacture setting ...
Страница 1520: ...6F2S1915 0 46 GRZ200 Soft 031 032 1499 Appendix 9 Matrix between VCT terminals and relay applications ...
Страница 1523: ...6F2S1915 0 46 GRZ200 Soft 031 032 1502 Appendix 10 CT requirement ...
Страница 1531: ...6F2S1915 0 46 GRZ200 Soft 031 032 1510 Appendix 12 Engineering exercise ...
Страница 1563: ......