Function-Group Type Phasor Measurement Unit (Pmu); Overview Of Functions; Structure Of The Function Group; Function Description - Siemens SIPROTEC 5 Manual

Function-Group Types

6.4 Function-Group Type Phasor Measurement Unit (PMU)

6.4 Function-Group Type Phasor Measurement Unit (PMU)

Overview of Functions

6.4.1
A Phasor Measurement Unit (PMU) measures the phasor values of current and voltage. These values get a high
precision time stamp and together with the values of power frequency, power frequency change rate and
optional binary data that are also time stamped are transmitted to a central analysis station. The standardized
transmission protocol IEEEC 37.118 is used to do this.

Structure of the Function Group

6.4.2
The PMU function group is activated by selecting the protocol
(electrical or optical). The PMU obtains the measured values from the measuring points and the precise time
from time synchronization. The time-stamped synchrophasors for current and voltage are formed from this
and transferred together with additional values via the communication module to a server (PDC, Phasor Data
Concentrator).
[dwstrpmu-250613-01.tif, 2, en_US]
Figure 6-12

Function Description

6.4.3
The synchrophasors, sent from the PMU in a continuous data stream to a PDC, are provided with time stamps
and thus are comparable with the measured values of other PMUs. The power frequency, the power frequency
change rate and optional binary information are also transmitted as time-stamped measured values. There-
fore, you receive an overview of the transient processes in a distributed energy transfer system, for example
network fluctuations and compensating processes.
The following table shows the differences between the PMU measured values and the remaining measured
values of the device.
152
Structure/Embedding of the Function
IEEE C37.118PMU on an Ethernet module
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017