Alstom MiCOM P846, Technical Manual

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Application Notes P846/EN AP/D
MiCOM P846
(AP) 6-7
AP
n CT1 and CT2 are permissible as all CT2 input values
Operation section.
is provided to reduce the sensitivity of the ∆ -filters and to avoid spurious
2.4
imulates and reproduces the exact behavior of the
mulates test cases with the graphical interface GUI shown on figure 2. It is
- Input data file
entary information
Primary ratio CT mismatches betwee
are initially scaled based on the CT ratio mismatch. As has been discussed in the operation
section, all voltages and currents are then per-unitized which requires the nominal line-to-line
voltage and nominal surge impedance loading of the line to be specified.
Parameters CVT Enable and Threshold are described in paragraph 2.3 of
They are used to detect abnormal asymmetries in the line phase voltages due to CVT
degradation.
The 'Tie-Line factor'
open line detection of such tie-lines.
DLO simulator and some test cases
The DLOSimulator is a program that s
MiCOM P846 relay. It is running on Windows and either processes Comtrade and Matlab
data files.
The user si
divided in
4
main areas corresponding to the 4 sequential steps of operation:
1
A – Format
B – Supplem
C – Directory and name
D – Loading
- Line Parameters 2
ulate DLO 3 - Sim
- Output data file
and name
4
A – Format
B – Directory
D – Save data file