Multipurpose Filter Smaihpac - ABB RELION RET670 Applications Manual

1MRK 504 163-UUS A
Section 13
13.1
13.1.1
13.1.2
Transformer protection RET670 2.2 ANSI
Application manual
System protection and control

Multipurpose filter SMAIHPAC

Identification
Function description
Multipurpose filter
Application
The multi-purpose filter, function block with name SMAI HPAC, is arranged as a
three-phase filter. It has very much the same user interface (e.g. function block outputs)
as the standard pre-processing function block SMAI. However the main difference is
that it can be used to extract any frequency component from the input signal. For all
four analogue input signals into this filter (i.e. three phases and the residual quantity)
the input samples from the TRM module, which are coming at rate of 20 samples per
fundamental system cycle, are first stored. When enough samples are available in the
internal memory, the phasor values at set frequency defined by the setting parameter
SetFrequency are calculated. The following values are internally available for each of
the calculated phasors:
• Magnitude
• Phase angle
• Exact frequency of the extracted signal
The SMAI HPAC filter is always used in conjunction with some other protection
function (e.g. multi-purpose protection function or overcurrent function or over-voltage
function or over-power function). In this way many different protection applications
can be arranged. For example the following protection, monitoring or measurement
features can be realized:
System protection and control
IEC 61850 IEC 60617
identification identification
SMAIHPAC -
Section 13
GUID-6B541154-D56B-452F-B143-4C2A1B2D3A1F v1
GUID-8224B870-3DAA-44BF-B790-6600F2AD7C5D v1
ANSI/IEEE C37.2
device number
-
GUID-A1F20DD8-571E-42C3-84F3-C557EC352ED0 v1
661