Wide Area Measurement System; Current Protection - Hitachi Relion 670 Series Product Manual

Phasor measurement unit RES670
Version 2.2
powerful generators, with stator windings split into two
groups per phase, when each group is equipped with
current transformers. The protection function performs a
simple summation of the currents of the two channels I3P1
and I3P2.

5. Wide area measurement system

Configuration parameters for IEEE 1344 and IEC/IEEE
60255-118 (C37.118) protocol PMUCONF
The IED supports the following IEEE synchrophasor
standards:
• IEEE 1344-1995 (Both measurements and data
communication)
• IEEE Std IEC/IEEE 60255-118 (C37.118) (Both
measurements and data communication)
• IEEE Std IEC/IEEE 60255-118 (C37.118) and IEC/IEEE
60255-118 (C37.118).1a-2014 (Measurements)
• IEEE Std IEC/IEEE 60255-118 (C37.118) (Data
communication)
PMUCONF contains the PMU configuration parameters for
both IEC/IEEE 60255-118 (C37.118) and IEEE 1344
protocols. This means all the required settings and
parameters in order to establish and define a number of
TCP and/or UDP connections with one or more PDC clients
(synchrophasor client). This includes port numbers,
TCP/UDP IP addresses, and specific settings for IEC/IEEE
60255-118 (C37.118) as well as IEEE 1344 protocols.
Protocol reporting via IEEE 1344 and IEC/IEEE
60255-118 (C37.118) PMUREPORT
The phasor measurement reporting block moves the phasor
calculations into an IEC/IEEE 60255-118 (C37.118) and/or
IEEE 1344 synchrophasor frame format. The PMUREPORT
block contains parameters for PMU performance class and
reporting rate, the IDCODE and Global PMU ID, format of
the data streamed through the protocol, the type of reported
synchrophasors, as well as settings for reporting analog and
digital signals.
The message generated by the PMUREPORT function
block is set in accordance with the IEC/IEEE 60255-118
(C37.118) and/or IEEE 1344 standards.
There are settings for Phasor type (positive sequence,
negative sequence or zero sequence in case of 3-phase
phasor and L1, L2 or L3 in case of single phase phasor),
PMU's Service class (Protection or Measurement), Phasor
representation (polar or rectangular) and the data types for
phasor data, analog data and frequency data.
Synchrophasor data can be reported to up to 8 clients over
TCP and/or 6 UDP group clients for multicast or unicast
transmission of phasor data from the IED. More information
regarding synchrophasor communication structure and
TCP/UDP configuration is available in Application Manual
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under section IEC/IEEE 60255-118 (C37.118) Phasor
Measurement Data Streaming Protocol Configuration.
Multiple PMU functionality can be configured in the IED,
which can stream out same or different data at different
reporting rates or different performance (service) classes.

6. Current protection

Directional phase overcurrent protection, four steps
OC4PTOC
Directional phase overcurrent protection, four steps
(OC4PTOC) has an inverse or definite time delay for each
step.
All IEC and ANSI inverse time characteristics are available
together with an optional user defined time characteristic.
The directional function needs voltage as it is voltage
polarized with memory. The function can be set to be
directional or non-directional independently for each of the
steps.
A second harmonic blocking level can be set for the function
and can be used to block each step individually.
Directional residual overcurrent protection, four
steps EF4PTOC
Directional residual overcurrent protection, four steps
(EF4PTOC) can be used as main protection for phase-to-
earth faults. It can also be used to provide a system back-
up, for example, in the case of the primary protection being
out of service due to communication or voltage transformer
circuit failure.
EF4PTOC has an inverse or definite time delay independent
for each step.
All IEC and ANSI time-delayed characteristics are available
together with an optional user-defined characteristic.
EF4PTOC can be set to be directional or non-directional
independently for each step.
IDir, UPol and IPol can be independently selected to be
either zero sequence or negative sequence.
A second harmonic blocking can be set individually for each
step.
Directional operation can be combined together with the
corresponding communication logic in permissive or
blocking teleprotection scheme. The current reversal and
weak-end infeed functionality are available as well.
The residual current can be calculated by summing the
three-phase currents or taking the input from the neutral CT.
1MRK 511 410-BEN P
M12846-3 v18
M13667-3 v20
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