Setting Examples For Iec/Uca 61850-9-2Le And Time Synchronization - Hitachi Relion 670 Series Applications Manual
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1MRK511407-UUS Rev. N
Function description
Four step directional negative phase sequence overcurrent
protection
Four step phase overcurrent protection
Out-of-step protection
Two step overvoltage protection
Rate-of-change frequency protection
Overfrequency protection
Underfrequency protection
Sensitive Directional residual over current and power
protetcion
Circuit breaker condition monitoring
Insulation gas monitoring
Insulation liquid monitoring
Two step undervoltage protection
19.3.4.2
Setting examples for IEC/UCA 61850-9-2LE and time synchronization
The IED and the Merging Units (MU) should use the same time reference especially if analog data is
used from several sources, for example from an internal TRM and an MU, or if several physical MUs are
used. Having the same time reference is important to correlate data so that channels from different
sources refer to the correct phase angle.
When only one MU is used as an analog source, it is theoretically possible to do without time
synchronization. However, this would mean that timestamps for analog and binary data/events become
uncorrelated. If the IED has no time synchronization source configured, then the binary data/events will
be synchronized with the merging unit. However, the global/complete time might not be correct.
Disturbance recordings then appear incorrect since analog data is timestamped by MU, and binary
events use the internal IED time. It is thus recommended to use time synchronization also when analog
data emanate from only one MU.
An external time source can be used to synchronize both the IED and the MU. It is also possible to use
the MU as a clock master to synchronize the IED from the MU. When using an external clock, it is
possible to set the IED to be synchronized via IRIG-B or PTP. It is also possible to use an internal GPS
receiver in the IED (if the external clock is using GPS).
Phasor measurement unit RES670
Application manual
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IEC 61850 identification
NS4PTOC
OC4PTOC
OOSPPAM
OV2PTOV
SAPFRC
SAPTOF
SAPTUF
SDEPSDE
SSCBR
SSIMG
SSIML
UV2PTUV
Section 19
Station communication
GUID-CEDD520A-8A13-41DF-BFF1-8A3B4C00E098 v5
283
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