3 New approach to the operative maintenance
of secondary systems
3.1 Rationale
On the basis of the requirements of Elektro Ljubljana, the
Project Team decided to implement a "mobile intelligent
expert system" for managing operative maintenance [1; 2; 3;
9]. The implementation commenced with a pilot project that
included only services of power system protection devices.
The scheme in service is outlined in Figure 1.
The new system is based upon an MS SQL Server® 2005
platform. The user interface allows:
- an overview of protection device locations;
- an overview of protection types that are already prepared
for use "off the shelf" from the database;
- test template management and
- protection modeling, where the user can make their own
model of a protection device as required.
In the case where there is a requirement to input settings of
older protection relay types, the parameters are captured
manually or in specific cases from other files. In the case
where we are dealing with digital / numerical devices, the
parameters could be imported from previously generated
setting files. When importing, the comparison with the existing
system settings can be undertaken.
Every change and confirmation of protection settings causes a
data transaction, meaning that text values are converted into a
data structure called XRIO. This type of structure is suitable
for executing all calculations that are necessary for the test
procedure. The test procedure is a part of the testing equipment
and comprises all data that is necessary to be employed
during testing. As has been indicated above, this data is directly
linked to XRIO's calculated values.
Automatic composition of the testing procedures must be
based on a chosen testing protocol that is most suitable for the protection manager. XRIO also contains tolerance data that is
used for automatic test assessment decisions.
3 New approach to the operative maintenance
of secondary systems
3.1 Rationale
On the basis of the requirements of Elektro Ljubljana, the
Project Team decided to implement a "mobile intelligent
expert system" for managing operative maintenance [1; 2; 3;
9]. The implementation commenced with a pilot project that
included only services of power system protection devices.
The scheme in service is outlined in Figure 1.
The new system is based upon an MS SQL Server® 2005
platform. The user interface allows:
- an overview of protection device locations;
- an overview of protection types that are already prepared
for use "off the shelf" from the database;
- test template management and
- protection modeling, where the user can make their own
model of a protection device as required.
In the case where there is a requirement to input settings of
older protection relay types, the parameters are captured
manually or in specific cases from other files. In the case
where we are dealing with digital / numerical devices, the
parameters could be imported from previously generated
setting files. When importing, the comparison with the existing
system settings can be undertaken.
Every change and confirmation of protection settings causes a
data transaction, meaning that text values are converted into a
data structure called XRIO. This type of structure is suitable
for executing all calculations that are necessary for the test
procedure. The test procedure is a part of the testing equipment
and comprises all data that is necessary to be employed
during testing. As has been indicated above, this data is directly
linked to XRIO's calculated values.
Automatic composition of the testing procedures must be
based on a chosen testing protocol that is most suitable for the protection manager. XRIO also contains tolerance data that is
used for automatic test assessment decisions.
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