Pmu Report Function Blocks Connection Rules In Pcm600 Application Configuration Tool (Act) - Hitachi Relion 670 Series Applications Manual

Section 6
Wide area measurement system
6.1.3.4 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 37
both function blocks are working on 0.9 ms cycle time.
IEC140000124 V2 EN-US
Figure 37:
Figure 38
the SMAI block is working on 3 ms while PHASORREPORT block is working on 0.9 ms cycle time.
IEC140000125 V2 EN-US
Figure 38:
Violation of rule 1 results in PMU applications not running at all. The reason is the inconsistent cycle
time. For example, in Figure 38, 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
PHASORREPORT blocks have similar settings for SvcClass and ReportRate. Figure
settings for PMUREPORT function block demonstrated by PCM600 Parameter Setting Tool (PST).
84
shows an example of correct connection of SMAI and PHASORREPORT blocks in ACT where
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 where
An example of wrong connection of SMAI and PHASORREPORT blocks in ACT
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