ABB Relion 670 Series Applications Manual page 110

Section 6
Wide area measurement system
The scale factor will be sent as 3051804 on configuration frame 2, and 305180.43 on configuration
frame 3. The range of analog values that can be transmitted in this case is
-10000000000 and +305181 to +10000000000 .
6.2.3.4 PMU Report Function Blocks Connection Rules in PCM600 Application
Configuration Tool (ACT)
There are 3 important general rules which have to be considered in PCM600 ACT for the
connection of preprocessor blocks (SMAI) and 3PHSUM blocks to PHASORREPORT blocks:
Rule 1:
Only SMAI or 3PHSUM blocks shall be connected to PMU PHASORREPORT blocks and they shall
have the same cycle time, 0.9 ms.
Figure 39
where both function blocks are working on 0.9 ms cycle time.
IEC140000124 V2 EN-US
Figure 39: An example of correct connection of SMAI and PHASORREPORT blocks in ACT
Figure 40
where the SMAI block is working on 3 ms while PHASORREPORT block is working on 0.9 ms cycle
time.
IEC140000125 V2 EN-US
Figure 40: An example of wrong connection of SMAI and PHASORREPORT blocks in ACT
Violation of rule 1 results in PMU applications not running at all. The reason is the inconsistent
cycle time. For example, in Figure 40, the SMAI block is updating its output every 3 ms while the
PHASORREPORT block is expecting input every 0.9 ms. The PHASORREPORT filtering window is
designed to receive updated input every 0.9 ms and therefore the application will fail.
Rule 2:
The same SMAI or 3PHSUM block can be connected to more than one PHASORREPORT block only if
all the connected PHASORREPORT blocks have similar instance number or only if all the connected
104
shows an example of correct connection of SMAI and PHASORREPORT blocks in ACT
shows an example of wrong connection of SMAI and PHASORREPORT blocks in ACT
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1MRK 511 401-UUS F
-305181 to
GUID-66667179-F3E1-455B-8B99-6D73F37E949B v3
IEC140000124-2-en.vsd
IEC140000125-2-en.vsd
Bay control REC670
Application manual