Hitachi Relion 670 Series Applications Manual page 360

Section 16
Metering
16.2.1 Identification
Function description
Function for energy calculation and
demand handling
16.2.2 Application
Energy calculation and demand handling function (ETPMMTR) is intended for statistics of the
forward and reverse active and reactive energy. It has a high accuracy basically given by the
measurements function (CVMMXN). This function has a site calibration possibility to further increase
the total accuracy.
The function is connected to the instantaneous outputs of (CVMMXN) as shown in figure 175.
IEC13000190 V2 EN-US
Figure 175:
The energy values can be read through communication in MWh and MVArh in monitoring tool of
PCM600 and/or alternatively the values can be presented on the local HMI. The local HMI graphical
display is configured with PCM600 Graphical Display Editor tool (GDE) with a measuring value which
is selected to the active and reactive component as preferred. Also all Accumulated Active Forward,
Active Reverse, Reactive Forward and Reactive Reverse energy values can be presented.
Maximum demand values are presented in MWh or MVArh in the same way.
Alternatively, the energy values can be presented with use of the pulse counters function (PCGGIO).
The output energy values are scaled with the pulse output setting values EAFAccPlsQty,
EARAccPlsQty, ERFAccPlsQty and ERVAccPlsQty of the energy metering function and then the
pulse counter can be set-up to present the correct values by scaling in this function. Pulse counter
values can then be presented on the local HMI in the same way and/or sent to the SA (Substation
Automation) system through communication where the total energy then is calculated by summation
of the energy pulses. This principle is good for very high values of energy as the saturation of
numbers else will limit energy integration to about one year with 50 kV and 3000 A. After that the
accumulation will start on zero again.
16.2.3 Setting guidelines
The parameters are set via the local HMI or PCM600.
354
IEC 61850
identification
ETPMMTR
CVMMXN
P_ INST
Q_ INST
Connection of energy calculation and demand handling function ETPMMTR to the
measurements function (CVMMXN)
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IEC 60617 ANSI/IEEE C37.2
identification device number
W_Varh -
ETPMMTR
P
Q
STARTACC
STOPACC
RSTACC
RSTDMD
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