Human Machine Interface; Basic Ied Functions - Hitachi Relion 670 Series Product Manual

Phasor measurement unit RES670
Version 2.2
signal. As output of this function: periodic energy
calculations, integration of energy values, calculation of
energy pulses, alarm signals for limit violation of energy
values and maximum power demand, can be found.
The values of active and reactive energies are calculated
from the input power values by integrating them over a
selected time tEnergy. The integration of active and reactive
energy values will happen in both forward and reverse
directions. These energy values are available as output
signals and also as pulse outputs. Integration of energy
values can be controlled by inputs (STARTACC and
STOPACC) and EnaAcc setting and it can be reset to initial
values with RSTACC input.
The maximum demand for active and reactive powers are
calculated for the set time interval tEnergy and these values
are updated every minute through output channels. The
active and reactive maximum power demand values are
calculated for both forward and reverse direction and these
values can be reset with RSTDMD input.

16. Human machine interface

Local HMI
IEC13000239 V3 EN-US
Figure 4. Local human-machine interface
The LHMI of the IED contains the following elements
34
• Graphical display capable of showing a user defined
single line diagram and provide an interface for controlling
switchgear.
• Navigation buttons and five user defined command
buttons to shortcuts in the HMI tree or simple commands.
• 15 user defined three-color LEDs.
• Communication port for PCM600.
The LHMI is used for setting, monitoring and controlling.
Remote IED access
Instead of the LHMI the Remote IED Access tool, RIA600,
can be used and perform all of the actions that a physical
LHMI can. The LHMI is then replaced by a blank front plate.

17. Basic IED functions

Time synchronization
The time synchronization source selector is used to select a
common source of absolute time for the IED. For RES670
as a Phasor Measurement Unit (PMU) an accurate time
synchronization is essential to allow the comparison of
phasors measured at different locations in a Wide Area
Monitoring System (WAMS). For an IED as part of a
protection system, time synchronization is required to
compare event and disturbance data between all IEDs in a
AMU0600442 v16
substation automation system. A common source shall be
used for IED and merging unit when IEC 61850-9-2LE
process bus communication is used.
Only GPS and IRIG-B (Optical IRIG-B 00X is
recommended), with IEEE1344 support, are the acceptable
time synchronization sources for synchrophasor
measurement applications and RES670 supports both.
Precision time protocol PTP
PTP according to IEEE 1588-2008 and specifically its profile
IEC/IEEE 61850-9-3 for power utility automation is a
synchronization method that can be used to maintain a
common time within a station. This time can be
synchronized to the global time using, for instance, a GPS
receiver. If PTP is enabled on the IEDs and the switches
that connect the station are compatible with IEEE 1588, the
station will become synchronized to one common time with
an accuracy of under 1us. Using an IED as a boundary
clock between several networks will keep 1us accuracy on
three levels or when using an HSR, 15 IEDs can be
IEC13000239-3-en.vsd
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1MRK 511 410-BEN P
The IED supports SNTPv4 (RFC2030).
M11344-3 v12
M11345-3 v13
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