ABB 615 Series ANSI, Technical Manual

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1MAC050144-MB C
Section 8
Measurement functions
615 series ANSI 543
Technical Manual
8.1.2.2 Deadband supervision
Table 447: Parameters for deadband calculation
8.1.2.3 Power and energy calculation
The single- and three-phase power is calculated from the phase-to-ground voltages and
phase-to-ground currents. Power measurement function is capable of calculating complex
power based on the fundamental frequency component phasors (DFT) as following:
8.1.3 Measurement function applications
The measurement functions are used for power system measurement, supervision and
reporting to LHMI, a monitoring tool within PCM600, or to the station level, for example,
with IEC 61850. The possibility to continuously monitor the measured values of active
power, reactive power, currents, voltages, power factors and so on, is vital for efficient
production, transmission, and distribution of electrical energy. It provides a fast and easy
overview of the present status of the power system to the system operator. Additionally, it
Function Settings Maximum/minimum (=range)
Three-phase current measurement
(CMMXU)
A deadband
40 / 0 (=40xIn)
Three-phase voltage measurement
(VMMXU)
V Deadband
4 / 0 (=4xVn)
Residual current measurement
(RESCMMXU)
A deadband res
40 / 0 (=40xIn)
Residual voltage measurement
(RESVMMXU)
V deadband res
4 / 0 (=4xVn)
The frequency measurement (FMMXU) F deadband 75 / 35 (=40Hz)
Phase sequence current measurement
(CSMSQI)
Ps Seq A deadband,
Ng Seq A deadband,
Zro A deadband
40 / 0 (=40xIn)
Phase sequence voltage measurement
(VSMSQI)
Ps Seq V deadband,
Ng Seq V deadband,
Zro V deadband
4/0 (=4xVn)
Single-phase power and energy
measurement (SPEMMXU)
-
Three-phase power and energy
measurement (PEMMXU)
-
In the power and energy measurement functions, SPEMMXU and
PEMMXU, the deadband supervision is done separately for apparent
power (S, with the pre-set value of fixed 10% of the Sn) and the power
factor (PF, with the pre-set values of fixed 0.10). All of the power
measurement related values: P, Q, S and PF are reported simultaneously
when either one of the S or PF values exceed the pre-set limit.
) I U I U I U (
C
*
C B
*
B A
*
A
     
S