Metering; Event Function; Measured Value Expander Block Range_Xp; Function For Energy Calculation And Demand Handling (Etpmmtr) - ABB RET670 Product Manual
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Also See for RET670:
- Applications manual (1016 pages) ,
- Commissioning manual (328 pages) ,
- Installation and commissioning manual (240 pages)
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Transformer protection RET670 2.0
Product version: 2.0
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 96 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.
The disturbance recorder information for up to 100
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 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
38
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.
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.
1MRK 504 141-BEN C
EnaAcc setting and it can be
tEnergy and these values are
ABB
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