ABB Relion REG670, Technical Manual

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20.14.4 Operation principle
The Signal matrix for mA inputs (SMMI) function, see figure 511 , receives its inputs
from the real (hardware) mA inputs (the MIM boards) via the Signal Matrix Tool
(SMT), and makes them available to the rest of the configuration via its analog
outputs, named AI1 to AI6. The inputs, outputs, as well as the whole block, can be
given user-defined names which will be represented in SMT and ACT.
The outputs on SMMI can also be connected to the IEC 61850 generic communication
I/O functions (MVGAPC) for further use of the mA signals elsewhere in a substation
system.
20.15 Signal matrix for analog inputs SMAI
20.15.1 Functionality
Signal matrix for analog inputs (SMAI), also known as the preprocessor function
block, analyses the connected four analog signals (three phases and neutral) and
calculates all relevant information from them like the phasor magnitude, phase angle,
frequency, true RMS value, harmonics, sequence components and so on. This
information is then used by the respective functions connected to this SMAI block in
ACT (for example protection, measurement or monitoring functions).
20.15.2 Function block
SMAI1
BLOCK
DFTSPFC
REVROT
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N SPFCOUT
G1AI3P
G1AI1
G1AI2
G1AI3
G1AI4
G1N
IEC14000027-1-en.vsd
IEC14000027 V1 EN
Figure 512: SMAI1 function block
SMAI2
BLOCK
REVROT
^GRP2L1
^GRP2L2
^GRP2L3
^GRP2N G2AI3P
G2AI1
G2AI2
G2AI3
G2AI4
G2N
IEC14000028-1-en.vsd
IEC14000028 V1 EN
Figure 513: SMAI2 function block
Figure 513 is an example of SMAI2:n to SMAI12:m in each of the three task time
groups 1, 2 or 3 where:
Section 20
1MRK502052-UEN B
Basic IED functions
1128
Technical manual