ABB REC670 Applications Manual page 131

1MRK 511 401-UUS A
Bay control REC670 2.2 ANSI
Application manual
power system signal at the time it is applied to the PMU input. All of these
estimates must be compensated for PMU processing delays including analog
input filtering, sampling, and estimation group delay. If the sample time tags
are compensated for all input delays, the time tag of the sample in the middle
of the estimation window can be used for the phasor estimation (output) time
tag as long as the filtering coefficients are symmetrical across the filtering
window.
Note: It is recommended to set this parameter on MiddleSample.
2. PHASORREPORT is the function block responsible for reporting the
synchrophasors. Each instance of PMUREPORT function block has 32 phasor
channels with the following setting parameters; where X is a number from 1 to 32:
• PhasorXReport: Enables/Disables the phasor channel X (reporting of
PhasorX) by choosing On/Off setting.
• PhasorX: The group selector for PhasorX. Here, the user can select the type
of reported synchrophasor from the phasor channel X as either a 3-phase
symmetrical component or a single-phase phasor. The options are as follows:
• A
• B
• C
• NEGSEQ
• POSSEQ
• ZEROSEQ
• PhasorXUseFreqSrc: Enables/Disables the contribution of Phasor channel X
in automatic frequency source selection by choosing On/Off setting. Each
voltage-connected preprocessor block delivers the frequency data, derived
from the analog input AC voltage values, to the respective voltage phasor
channel. Every phasor channel has a user-settable parameter
(PhasorXUseFreqSrc) to be used as a source of frequency data for reporting
to the PDC client. It is very important to set this parameter to On for the
voltage-connected phasor channels. There is an automatic frequency source
selection logic to ensure an uninterrupted reporting of the system frequency
to the PDC client. More information is available under the section
reporting.
3. ANALOGREPORT is the function block responsible for reporting the analog
values. Each instance of ANALOGREPORT function block has 24 analog
channels with the following setting parameters; where X is a number from 1 to 24:
• AnalogXRange: This parameter defines a range between -AnalogXRange and
+AnalogXRange for AnalogX value. The range will be used by the IED to
apply a proper scale factor to the AnalogX values when Integer format is
used. It refers to the 4-byte ANUNIT field of the configuration frames 1, 2
organization and the 8-byte ANSCALE field of the configuration frame 3
organization defined in IEEE C37.118.2 message format. The
AnalogXRange value can be a number between 3277.0 and 10000000000.
Wide area measurement system
Section 6
Frequency
125