Consideration - ABB REG670 Applications Manual

1MRK 502 071-UEN -
17.6.3.5
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual
Indications
IndicationMaN: Indication mask for binary input N. If set (Show), a status change of
that particular input, will be fetched and shown in the disturbance summary on local
HMI. If not set (Hide), status change will not be indicated.
SetLEDN: Set red LED on local HMI in front of the IED if binary input N changes
status.
Disturbance recorder
OperationM: Analog channel M is to be recorded by the disturbance recorder (On) or
not (Off).
If OperationM = Off, no waveform (samples) will be recorded and reported in graph.
However, Trip value, pre-fault and fault value will be recorded and reported. The
input channel can still be used to trig the disturbance recorder.
If OperationM = On, waveform (samples) will also be recorded and reported in graph.
Event recorder
Event recorder (ER) function has no dedicated parameters.
Trip value recorder
ZeroAngleRef: The parameter defines which analog signal that will be used as phase
angle reference for all other analog input signals. This signal will also be used for
frequency measurement and the measured frequency is used when calculating trip
values. It is suggested to point out a sampled voltage input signal, for example, a line
or busbar phase voltage (channel 1-30).
Event list
Event list (EL) (SOE) function has no dedicated parameters.

Consideration

The density of recording equipment in power systems is increasing, since the number
of modern IEDs, where recorders are included, is increasing. This leads to a vast
number of recordings at every single disturbance and a lot of information has to be
handled if the recording functions do not have proper settings. The goal is to optimize
the settings in each IED to be able to capture just valuable disturbances and to
maximize the number that is possible to save in the IED.
The recording time should not be longer than necessary (PostFaultrecT and
TimeLimit).
• Should the function record faults only for the protected object or cover more?
• How long is the longest expected fault clearing time?
• Is it necessary to include reclosure in the recording or should a persistent fault
generate a second recording (PostRetrig)?
Minimize the number of recordings:
Section 17
Monitoring
649