Frequency Reporting - Hitachi Relion 670 Series Applications Manual

Section 6
Wide area measurement system
in this figure, is only an example and the actual connections and reported signals on the
IEEEC37.118/1344 can be defined by the user.
MU
U
TRM
I
U
TRM
I
I/P
MIM
BIM
GPS /
IRIG-B
IEC140000146 V2 EN-US
Figure 36:
The TRM modules are individually AC-calibrated in the factory. The calibration data is stored in the
prepared area of the TRM EEProm. The pre-processor block is extended with calibration compensation
and a new angle reference method based on timestamps. The AI3P output of the preprocessor block is
used to provide the required information for each respective PMUREPORT phasor channel. More
information about preprocessor block is available in the section Signal matrix for analog inputs SMAI.
6.1.3.1

Frequency reporting

By using patented algorithm the IED can track the power system frequency in quite wide range from 9 Hz
to 95 Hz. In order to do that, the three-phase voltage signal shall be connected to the IED. Then IED can
adapt its filtering algorithm in order to properly measure phasors of all current and voltage signals
connected to the IED. This feature is essential for proper operation of the PMUREPORT function or for
protection during generator start-up and shut-down procedure.
This adaptive filtering is ensured by proper configuration and settings of all relevant pre-processing
blocks, see Signal matrix for analog inputs in the Application manual. Note that in all preconfigured IEDs
such configuration and settings are already made and the three-phase voltage are used as master for
frequency tracking. With such settings the IED will be able to properly estimate the magnitude and the
phase angle of measured current and voltage phasors in this wide frequency range.
80
SMAI
SMMI
MEAS.
OR
PROTECTION
OP
UP
OC
PPS time data
UV
Overview of reporting functionality (PMUREPORT)
© 2017 - 2023 Hitachi Energy. All rights reserved
U/I samples
PMUREPORT1
PHASOR1
PHASOR2
IEEEC37.118 / 1344
messages
PHASOR32
ANALOG1
ANALOG2
ANALOG24
BINARY1
BINARY2
BINARY24
FREQTRIG
DFDTTRIG
MAGHIGHTRIG
MAGLOWTRIG
1MRK511407-UUS Rev. N
8 TCP
NUM
6 UDC
IEC140000146-1-en.vsd
GUID-4F3BA7C7-8C9B-4266-9F72-AFB139E9DC21 v2
Phasor measurement unit RES670
Application manual