7
7.1 Phasor Measurement Unit (PMU)
62 Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
PMU data communication via RS232
The COM 1 port at the rear panel has been provided for the connection of a PDC with RS232 or,
alternatively, with a modem/null modem.
Table 7-8 provides an overview of the data volume of the SIMEAS R-PMU depending on the
device configuration and the reporting rate for RS232 communication.
The data rates possible for modem communication restrict the reporting rates to be set. Optimum
conditions allow up to 33 kbit/s. Depending on quality of the telephone network extremely lower
data rates can be expected. During parameterization, OSCOP P calculates the expected data
rate and generates corresponding warning messages. If the configuration parameterized by the
user leads to data rates higher than 9 kbit/s, a message is given that PMU data may be lost. For
data rates higher than 32 kbit/s a message is given that data will be lost.
Table 7-7 TCP transmission via LAN:
Data transfer rate depending on the configuration and reporting rate in kbit/s,
data format 32 bit float
Configuration Type Reporting rate (Hz)
10 12 15 20 25 30 50 60
1 AC DAU Positive-sequence system 7 8 10 13 16 20 33 39
1 AC DAU Phasors 1012152126315262
2 AC DAUs Positive-sequence system 9 11 13 18 22 26 44 53
2 AC DAUs Phasors 1620243341498198
4 AC DAUs Positive-sequence system 13 16 20 26 33 39 66 79
4 AC DAUs Phasors 283442567084141169
1 DDAU Process values 8 9 12 16 20 23 39 47
2 DDAUs Process values 11 14 17 23 28 34 56 68
1 BDAU Binary values 5781114162733
2 AC DAUs
2 DDAUs
Positive-sequence system/
process values
16 19 23 31 39 47 78 94
2 AC-DAUs
1 DDAU
1 BDAU
Phasors /
process values /
binary values
21 25 31 42 52 62 104 125
Note
If the PMU functionality of the SIMEAS R-PMU is used via a modem or null modem connection,
another connection to the SIMEAS R-PMU is required for the access to the remaining device
functions using OSCOP P. Only the LAN interface enables the simultaneous transmission of
PMU data and the communication via OSCOP P.
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