See Also
These files are outdated. Their descriptions are still maintained here as they can still be read into Simulator. However, they can no longer be saved. These records are now stored in Auxiliary Script/Data Files.
The sequence data files store the sequence data needed to run a fault analysis. The sequence data format has the following five different types of records:
- Generator
- Load
- Branch
- Switched Shunt
- Mutual Impedance
Each of these four types of sequence data records has a different format, since they each store different information for the sequence data. The format of each record is given below:
Generator
GEN busnum ID Rpos Xpos Rneg Xneg Rzer Xzer RN XN
where
busnum generator terminal bus,
id generator identifier,
Rpos, Xpos positive sequence resistance and reactance,
Rneg, Xneg negative sequence resistance and reactance,
Rzer, Xzer zero sequence resistance and reactance,
RN, XN neutral-to-ground resistance and reactance.
Load
LOAD busnum Gneg Bneg Gzer Bzer
where
busnum load terminal bus,
Gneg, Bneg negative sequence total conductance and susceptance for all loads at bus,
Gzer, Bzer zero sequence total conductance and susceptance for all loads at bus.
Branch
BRANCH fbusnum tbusnum ckt Rzer Xzer Czer fGzer fBzer tGzer tBzer Xftype
where
fbusnum, tbusnum from and to bus numbers for the branch,
ckt branch circuit identifier,
Rzer, Xzer zero sequence branch resistance and reactance,
Czer total zero sequence line charging,
fGzer, fBzer zero sequence line shunt conductance and susceptance at the from bus end of the branch,
tGzer, tBzer zero sequence line shunt conductance and susceptance at the to bus end of the branch,
Xftype Transformer configuration, entered as an integer based on the following table. Note that the default for a transmission line is 3, since a grounded wye - grounded wye transformer connection has the same equivalent model as a transmission line.
0 Wye - Wye
1 Grounded Wye - Wye
2 Wye - Grounded Wye
3 Grounded Wye - Grounded Wye
4 Wye - Delta
5 Delta - Wye
6 Grounded Wye - Delta
7 Delta - Grounded Wye
8 Delta - Delta
Switched Shunt
SSHUNT busnum numblocks Bzer1 Bzer2 …
where
busnum terminal bus number,
numblocks number of different zero sequence admittance blocks,
Bzer# zero sequence susceptance for each admittance block, maximum of 8.
Mutual Impedance
MUTIMP from1 to1 ckt1 from2 to2 ckt2 RM XM start1 end1 start2 end2
where
from1, to1 from and to bus numbers of the first mutually coupled branch,
ckt1 circuit identifier of the first mutually coupled branch,
from2, to2 from and to bus numbers of the second mutually coupled branch,
ckt2 circuit identifier of the second mutually coupled branch,
RM, XM zero sequence mutual resistance and reactance,
start1, end1 start and end locations of the section of the first line affected by the mutual coupling, with each point represented as a percentage of the total line length (between 0 and 1),
start2, end2 start and end locations of the section of the second line affected by the mutual coupling, with each point represented as a percentage of the total line length (between 0 and 1).