Hitachi Relion REL670 Product Manual page 54

Line distance protection REL670
Version 2.2
There are three LEDs on the local HMI (green, yellow and
red), which will display status information about the IED and
the Disturbance recorder function (triggered).
The Indication list function shows all selected binary input
signals connected to the Disturbance recorder function that
have changed status during a disturbance.
Event recorder DRPRDRE
Quick, complete and reliable information about disturbances
in the primary and/or in the secondary system is vital, for
example, time-tagged events logged during disturbances.
This information is used for different purposes in the short
term (for example corrective actions) and in the long term
(for example functional analysis).
The event recorder logs all selected binary input signals
connected to the Disturbance recorder function. Each
recording can contain up to 1056 time-tagged events.
The event recorder information is available for the
disturbances locally in the IED.
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 recorder
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
selected analog and binary signals connected to the
Disturbance recorder function (maximum 40 analog and 352
binary signals). The binary signals available are the same
as for 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.
Up to ten seconds of data before the trigger instant can be
saved in the disturbance file.
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The disturbance recorder information for up to 200
disturbances are saved in the IED and the local HMI is used
to view the list of recordings .
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
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is connected to the Event function (EVENT). The EVENT
function block is used for LON and SPA communication.
Analog, integer and double indication values are also
transferred through the EVENT function.
Generic communication function for Single Point
indication SPGAPC
Generic communication function for Single Point indication
(SPGAPC) is used to send one single logical signal to other
systems or equipment in the substation.
Generic communication function for measured
values MVGAPC
Generic communication function for measured values
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(MVGAPC) function is used to send the instantaneous value
of an analog signal to other systems or equipment in the
substation. It can also be used inside the same IED, to
attach a RANGE aspect to an analog value and to permit
measurement supervision on that value.
Measured value expander block RANGE_XP
The current and voltage measurements functions
(CVMMXN, CMMXU, VMMXU and VNMMXU), current and
voltage sequence measurement functions (CMSQI and
VMSQI) and IEC 61850 generic communication I/O
functions (MVGAPC) are provided with measurement
supervision functionality. All measured values can be
supervised with four settable limits: low-low limit, low limit,
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high limit and high-high limit. The measure value expander
block (RANGE_XP) has been introduced to enable
translating the integer output signal from the measuring
functions to 5 binary signals: below low-low limit, below low
limit, normal, above high limit or above high-high limit. The
output signals can be used as conditions in the configurable
logic or for alarming purpose.
Insulation supervision for gas medium function
SSIMG
Insulation supervision for gas medium (SSIMG ) is used for
monitoring the circuit breaker condition. Binary information
based on the gas pressure in the circuit breaker can be
used as input to the function. In addition, the function can
be used with an analog value of gas pressure and
temperature of the insulation medium and binary inputs. The
SSIMG function generates alarms based on the received
information.
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