Toshiba GR 200 Series, Instruction Manual

Page: 346 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 325 -
K
ab
=
Z
aa
+ Z
bb
2
− Z
ab
Z
1
(2.23-12)
K
bc
=
Z
bb
+ Z
cc
2
− Z
bc
Z
1
(2.23-13)
K
ca
=
Z
cc
+ Z
aa
2
− Z
ca
Z
1
(2.23-14)
K
a
=
Z
aa
−
Z
ab
+ Z
ca
2
Z
1
(2.23-15)
K
b
=
Z
bb
−
Z
bc
+ Z
ab
2
Z
1
(2.23-16)
K
c
=
Z
cc
−
Z
ca
+ Z
bc
2
Z
1
(2.23-17)
(ii)
Impedance setting using matrix components
With regard to Figure 2.23-1, when the voltage and current on a transmission line can
be expressed using matrix components, the user can select the following matrix setting:
[
V
a
V
b
V
c
] = [
Z
aa
Z
ab
Z
ac
Z
ba
Z
bb
Z
bc
Z
ca
Z
cb
Z
cc
] [
I
a
I
b
I
c
]
(2.23-18)
where,
Zaa
: Phase-‘a’ self-impedance on line GH (
=Zbb=Zcc
)
Zab
: Mutual-impedances between phase-‘a’ and phase-‘b’ on line GH (
=Zbc=Zca
)
Selection of matrix setting mode
Prior to applying the matrix settings, the user should set the scheme switch
[
FL_ImpSet
]
Matrix
.