ABB Relion 670 Series Applications Manual page 94

Section 6
Wide area measurement system
( X ( n ) X )
=
TVE
GUID-80D9B1EA-A770-4F50-9530-61644B4DEBBE V1 EN-US
where,
X (n) and X
r
X and X
r i
In order to comply with TVE requirements, special calibration is done in the factory on the analog
input channels of the PMU, resulting in increased accuracy of the measurements. The IEEE C37.118
standard also imposes a variety of steady state and dynamic requirements which are fulfilled in
the IED with the help of high accuracy measurements and advanced filtering techniques.
Figure 36
instance of PMUREPORT (PMUREPORT1) is shown. Note that connection of different signals to the
PMUREPORT, 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: Overview of reporting functionality (PMUREPORT)
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
88
2
- + -
( X ( n ) X )
r r i i
2 2
+
X X
r i
(n) are the measured values
i
are the theoretical values
shows an overview of the PMU functionality and operation. In this figure, only one
SMAI
SMMI
MEAS.
OR
PROTECTION
OP
UP
OC
PPS time data
UV
© Copyright 2017 Hitachi Power Grids. All rights reserved
2
U/I samples
PMUREPORT1
PHASOR1
PHASOR2
IEEEC37.118 / 1344
messages
PHASOR32
ANALOG1
ANALOG2
ANALOG24
BINARY1
BINARY2
BINARY24
FREQTRIG
DFDTTRIG
MAGHIGHTRIG
MAGLOWTRIG
1MRK 511 407-UUS Rev. J
(Equation 14)
8 TCP
NUM
6 UDC
IEC140000146-1-en.vsd
Phasor measurement unit RES670
Application manual