ABB REG670 - Operation Principle

Name Type Values (Range) Unit Description
MAXPAFD REAL - MW Maximum forward active
power demand value for
set interval
MAXPARD
REAL - MW Maximum reverse active
power demand value for
set interval
MAXPRFD
REAL - MVAr Maximum forward
reactive power demand
value for set interval
MAXPRRD
REAL - MVAr Maximum reactive power
demand value in reverse
direction
17.2.7 Operation principle
The instantaneous output values of active and reactive power from the Measurements
function CVMMXN are used and integrated over a selected time tEnergy to measure
the integrated energy. Figure 456 shows the overall functionality of the energy
calculation and demand handling function ETPMMTR.
Zero Clamping
Detection
P
Q
Maximum Power
Demand Calculation
Energy Accumulation
Calculation
STARTACC
STOPACC
RSTDMD
MAXPAFD
MAXPARD
MAXPRFD
MAXPRRD
EAFALM
EARALM
ERFALM
ERRALM
EAFACC
EARACC
ERFACC
ERRACC
ACCINPRG
EAFPULSE
EARPULSE
ERFPULSE
ERRPULSE
RSTACC
IEC13000185-2-en.vsd
IEC13000185 V2 EN
Figure 456: ETPMMTR Functional overview logical diagram
The integration of energy values is enabled by the setting EnaAcc and controlled by
the STARTACC and STOPACC inputs. If the integration is in progress, the output
ACCINPRG is high. Otherwise, it is low. Figure 457 shows the logic of the
ACCINPRG output. ACCINPRG is active when the STARTACC input is active and the
EnaAcc setting is enabled. When the RSTACC input is in the active state, the output
ACCINPRG is low even if the integration of energy is enabled. ACCINPRG is
deactivated by activating the STOPACC input.
1MRK502052-UEN B Section 17
Metering
989
Technical manual