Siemens SIMEAS R-PMU, Manual, Page: 18 / 296

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2.3 Recording Systems in High-Voltage Direct Current Substations
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Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
2.3 Recording Systems in High-Voltage Direct Current
Substations
The use of modern recording systems in high-voltage direct current (HVDC) transmission
systems is completely different from the application in communications systems or power plants.
The classic Transient Analog Recorder (TAR) function is very important in conjunction with the
process signal inputs. This combination allows you to record both alternating voltage and direct
voltage variables at the same time. In some cases, it is even desired that the firing pulses for
thyristors be recorded using the binary channels. This function may be used in Flexible
Alternating Current Transmission Systems (FACTS) and in thyristor-controlled reactive power
compensation systems.
It is to be expected that the Transient Phasor Recorder (TPR), Continuous Phasor Recorder
(CPR) and Phasor Measurement Unit (PMU) functions will be used increasingly in the future, to
supervise the function groups of the station in order to monitor the stability control of the network
and to record disturbances.
2.4 Recording Systems in Distribution Systems and
Industrial Complexes
Modern recording systems are also used in important transformer substations where
transmission turns into distribution. Such transformer substations exist both in the power supply
section and in industrial complexes. The most important function is the Transient Analog
Recorder (TAR) for the recording of short-circuits.