3.15.10.2 Setting guidelines
The trip value recorder (TVR) setting parameters are a part of the disturbance report
settings.
For the trip value recorder (TVR) there is one dedicated setting:
ZeroAngleRef: The parameter defines which analog signal to use as phase-angle
reference for all other input signals. It is suggested to point out a sampled voltage input
signal, for example a line or busbar phase voltage (channel 1-30).
3.15.11 Disturbance recorder
3.15.11.1 Application
The maximum number of recordings depend on each recordings total
recording time. Long recording time will reduce the number of
recordings to less than 100.
The IED flash disk should NOT be used to store any user files. This
might cause disturbance recordings to be deleted due to lack of disk space.
To get fast, complete and reliable information about fault current, voltage, binary
signal and other disturbances in the power system is very important. This is
accomplished by the Disturbance Recorder function and facilitates a better
understanding of the behavior of the power system and related primary and secondary
equipment during and after a disturbance. An analysis of the recorded data provides
valuable information that can be used to explain a disturbance, basis for change of IED
setting plan, improvement of existing equipment, and so on. This information can also
be used in a longer perspective when planning for and designing new installations, that
is a disturbance recording could be a part of Functional Analysis (FA).
The Disturbance Recorder (DR), always included in the IED, acquires sampled data
from all selected analog input and binary signals connected to the function blocks, that
is maximum 30 external analog, 10 internal (derived) analog and 96 binary signals.
The function is characterized by great flexibility as far as configuration, starting
conditions, recording times, and large storage capacity are concerned. Thus, the
disturbance recorder is not dependent on the operation of protective functions, and it
can record disturbances that were not discovered by protective functions.
The disturbance recorder information is saved for each of the recorded disturbances in
the IED and the user may use the local HMI to get some general information about the
1MRK504116-UUS C Section 3
IED application
801
Application manual
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