x/EN AP/Na7
-30 MiCOM P74
6. TOPOLOGY
The topological analysis of the state of the substation in real time is one of the primary
factors of the reliability of numerical differential busbar protection. Thus in the case of a
power system fault, this analysis determines the sections of the substation concerned with
the fault and only takes those sections out of service. The algorithms available for topological
analysis make this level of discrimination possible and it is these algorithms that are utilized
in the P74x scheme.
6.1 Topology Configuration Tool
For the P74x scheme the system topology is determined by replication of the circuit, i.e. the
connections between the various pieces of plant on the system, via a graphical interface.
This topological replication is carried out from a single line diagram of the system, which is
used to recreate the system using the topology configuration software. This is carried out by
GE personnel at an authorised GE competence centre or by the customer for extensions
after having successfully completed the dedicated training.
In that case, we’ll be very pleased to provide the installation code that is required to install
the P74x configuration tools (during installation, it will be required to enter this code).
It should be considered that use of the P74x Scheme Editor and Synoptic without
appropriate training and careful consideration can be extremely hazardous. To remind you
of this, every time the tools are launched the following “pop-up” message will be displayed:
FIGURE 10: P74x SCHEME EDITOR
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