ABB Relion REQ650, Applications Manual

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The measuring functions CMSQI and VMSQI provide sequence component
quantities:
• I: sequence currents (positive, zero, negative sequence, amplitude and angle)
• U: sequence voltages (positive, zero and negative sequence, amplitude and
angle).
The CVMMXN function calculates three-phase power quantities by using
fundamental frequency phasors (DFT values) of the measured current respectively
voltage signals. The measured power quantities are available either, as
instantaneously calculated quantities or, averaged values over a period of time (low
pass filtered) depending on the selected settings.
12.4.3 Setting guidelines
The available setting parameters of the measurement function CVMMXN, CMMXU,
VMMXU, CMSQI, VMSQI, VNMMXU are depending on the actual hardware
(TRM) and the logic configuration made in PCM600.
The parameters for the Measurement functions CVMMXN, CMMXU, VMMXU,
CMSQI, VMSQI, VNMMXU are set via the local HMI or PCM600.
GlobalBaseSel : Selects the global base value group used by the function to define
( IBase ), ( UBase ) and ( SBase ).
Operation : Off / On . Every function instance (CVMMXN, CMMXU, VMMXU,
CMSQI, VMSQI, VNMMXU) can be taken in operation ( On ) or out of operation
( Off ).
The following general settings can be set for the Measurement function
(CVMMXN).
PowAmpFact : Amplitude factor to scale power calculations.
PowAngComp : Angle compensation for phase shift between measured I & U.
Mode : Selection of measured current and voltage. There are 9 different ways of
calculating monitored three-phase values depending on the available VT inputs
connected to the IED. See parameter group setting table.
k : Low pass filter coefficient for power measurement, U and I.
UAmpCompY : Amplitude compensation to calibrate voltage measurements at Y% of
Ur, where Y is equal to 5, 30 or 100.
IAmpCompY : Amplitude compensation to calibrate current measurements at Y% of
Ir, where Y is equal to 5, 30 or 100.
IAngCompY : Angle compensation to calibrate angle measurements at Y% of Ir, where
Y is equal to 5, 30 or 100.
1MRK 505 291-UEN A
Section 12
Monitoring
263
Application manual