ABB REC670 Product Manual page 16

Bay control REC670
Pre-configured
Product version: 1.1
The event recording information is an
integrated part of the disturbance record
(Comtrade file).
Trip value recorder DRPRDRE
Information about the pre-fault and fault
values for currents and voltages are vital for
the disturbance evaluation.
The Trip value recorder calculates the values
of all selected analog input signals connected
to the Disturbance report function. The result
is magnitude and phase angle before and
during the fault for each analog input signal.
The trip value recorder information is
available for the disturbances locally in the
IED.
The trip value recorder information is an
integrated part of the disturbance record
(Comtrade file).
Disturbance recorder DRPRDRE
The Disturbance recorder function supplies
fast, complete and reliable information about
disturbances in the power system. It
facilitates understanding system behavior and
related primary and secondary equipment
during and after a disturbance. Recorded
information is used for different purposes in
the short perspective (for example corrective
actions) and long perspective (for example
Functional Analysis).
The Disturbance recorder acquires sampled
data from all selected analog input and
binary signals connected to the Disturbance
report function (maximum 40 analog and 96
binary signals). The binary signals are the
same signals as available under the event
recorder function.
The function is characterized by great
flexibility and is not dependent on the
operation of protection functions. It can
record disturbances not detected by
protection functions.
The disturbance recorder information for the
last 100 disturbances are saved in the IED
and the local HMI is used to view the list of
recordings.
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1MRK 511 192-BEN B
Event function
When using a Substation Automation system
with LON or SPA communication, time-
tagged events can be sent at change or
cyclically from the IED to the station level.
These events are created from any available
signal in the IED that is connected to the
Event function (EVENT). The event function
block is used for LON and SPA
communication.
Analog and double indication values are also
transferred through EVENT function.
Fault locator LMBRFLO
The accurate fault locator is an essential
component to minimize the outages after a
persistent fault and/or to pin-point a weak
spot on the line.
The fault locator is an impedance measuring
function giving the distance to the fault in
percent, km or miles. The main advantage is
the high accuracy achieved by compensating
for load current.
The compensation includes setting of the
remote and local sources and calculation of
the distribution of fault currents from each
side. This distribution of fault current,
together with recorded load (pre-fault)
currents, is used to exactly calculate the fault
position. The fault can be recalculated with
new source data at the actual fault to further
increase the accuracy.
Especially on heavily loaded long lines
(where the fault locator is most important)
where the source voltage angles can be up to
35-40 degrees apart the accuracy can be still
maintained with the advanced compensation
included in fault locator.
Measured value expander block RANGE_XP
The current and voltage measurements
functions (CVMMXU, CMMXU, VMMXU and
VNMMXU), current and voltage sequence
measurement functions (CMSQI and VMSQI)
and IEC 61850 generic communication I/O
functions (MVGGIO) are provided with
measurement supervision functionality. All
Issued: June 2010
ABB