Pcm600 Application Configuration Tool (Act) - ABB REC670 Applications Manual

Section 6
Wide area measurement system
6.2.3.4
112
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 38 shows an example of correct connection of SMAI and
PHASORREPORT blocks in ACT where both function blocks are working on 0.9
ms cycle time.
IEC140000124 V2 EN-US
Figure 38: An example of correct connection of SMAI and PHASORREPORT
blocks in ACT
Figure 39 shows an example of wrong connection of SMAI and PHASORREPORT
blocks in ACT 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 39: 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 39, 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.
1MRK 511 401-UEN A
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IEC140000124-2-en.vsd
IEC140000125-2-en.vsd
Bay control REC670 2.2 IEC
Application manual