Metering - ABB Relion 670 Series Product Manual

Line differential protection RED670 2.0
Product version: 2.0
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.
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 Value MVGAPC
Generic communication function for Measured Value 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, 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.
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 km, miles or % of line length. The main
advantage is the high accuracy achieved by compensating for
load current and for the mutual zero-sequence effect on double
circuit lines.
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.
ABB
Especially on heavily loaded long lines, 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.
Event counter with limit supervison L4UFCNT
The 30 limit counter L4UFCNT provides a settable counter with
four independent limits where the number of positive and/or
negative flanks on the input signal are counted against the
setting values for limits. The output for each limit is activated
when the counted value reaches that limit.
Overflow indication is included for each up-counter.

14. Metering

Pulse-counter logic PCFCNT
Pulse-counter logic (PCFCNT) function counts externally
generated binary pulses, for instance pulses coming from an
external energy meter, for calculation of energy consumption
values. The pulses are captured by the binary input module and
then read by the PCFCNT function. A scaled service value is
available over the station bus. The special Binary input module
with enhanced pulse counting capabilities must be ordered to
achieve this functionality.
Function for energy calculation and demand handling
(ETPMMTR)
Measurements function block (CVMMXN) can be used to
measure active as well as reactive power values. Function for
energy calculation and demand handling (ETPMMTR) uses
measured active and reactive power as input and calculates the
accumulated active and reactive energy pulses, in forward and
reverse direction. Energy values can be read or generated as
pulses. Maximum demand power values are also calculated by
the function. This function includes zero point clamping to
remove noise from the input signal. As output of this function:
periodic energy calculations, integration of energy values,
calculation of energy pulses, alarm signals for limit violation of
energy values and maximum power demand, can be found.
The values of active and reactive energies are calculated from
the input power values by integrating them over a selected time
tEnergy . The integration of active and reactive energy values will
happen in both forward and reverse directions. These energy
values are available as output signals and also as pulse outputs.
Integration of energy values can be controlled by inputs
(STARTACC and STOPACC) and
reset to initial values with RSTACC input.
The maximum demand for active and reactive powers are
calculated for the set time interval
updated every minute through output channels. The active and
reactive maximum power demand values are calculated for
both forward and reverse direction and these values can be
reset with RSTDMD input.
1MRK505310-BEN C
EnaAcc setting and it can be
tEnergy and these values are
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