SATEC PM180 Operation Manual - Manual (Page 96)

‎Chapter 8 Configuring Recorders Configuring the EN50160 Power Quality Recorder
94 PM180 Substation Automation Unit
Evaluation Techniques
EN50160 Evaluation Counters
Evaluation Counters and Evaluation Period
The PM180 uses a set of the evaluation counters for collecting EN50160 statistics
within a specified evaluation period.
The evaluation period is the period of time within which the device collects statistical
evaluation data. Supply voltage characteristics can be evaluated on a weekly or daily
basis. The evaluation period normally preset in your device is a week; this can be
changed via the EN50160 Advanced setup.
At the end of the evaluation period, the device records collected statistical evaluation
data to a log file, then clears the evaluation registers and counters so that each
evalu
ation period’s statistics is stored in a separate record.
You can upload and view the online statistics data via PAS reports, using data
collected since the beginning of the present evaluation interval. You can also
manually clear the present contents of the counters though PAS before starting your
EN50160 evaluation.
Observation Period
The observation period is the period of time within which the voltage characteristics
shall be assessed to ensure compliance with the standard. The observation periods
declared by the EN50160 may differ for characteristics for which compliance limits
are specified in the standard, usually one week, and for those for which only
indicative values are provided, usually one year.
The EN50160 compliance reports produced by PAS provide correct weekly and
yearly observation statistics regardless of the evaluation periods used for collecting
data. Whenever needed, PAS aggregates records within a number of the evaluation
intervals to provide correct observation periods. Some of the characteristics, like
rapid voltage changes or mains signaling voltage, may require daily assessments. If
you intend to use daily-evaluated voltage characteristics, select the daily evaluation
period via the EN50160 Advanced setup.
EN50160 Compliance Statistics Log
Data log file #9 is automatically configured in the PM180 for recording EN50160
compliance statistics. Appendix D lists parameters recorded to the file. The file is
arranged as a multi-section data log file where each voltage characteristic statistics is
stored in a separate section. Along with EN50160 compliance statistics recorded at
the end of each evaluation period, file also contains data that may be useful for
troubleshooting power quality problems for non-compliant voltage characteristics.
You can upload and view the EN50160 compliance statistics data via PAS reports or
via common PAS data logs views.
EN50160 Harmonics Survey Log
Data log file #10 is automatically configured in the PM180 for recording harmonics
survey statistics on a weekly or daily basis. You can see parameters recorded to the
file in Appendix D. The file stores maximum THD (total, odd and even harmonics)
and maximum harmonic voltages up to order 50 collected within each evaluation
period.
Harmonics survey is normally intended for troubleshooting harmonic problems
throughout electrical networks. It can be separately disabled or enabled in your
device via the EN50160 Advanced Setup. The evaluation period for harmonics
survey can be selected independently from the EN50160 compliance evaluation.
You can upload and view the harmonics survey data collected by your device via
PAS reports or via common PAS data logs views.
EN50160 Power Quality Event Log
The PM180 provides the EN50160 Power Quality (PQ) recorder that can detect
EN50160 incidents and record each individual power quality event to the log file with
the start and end timestamps and a fault magnitude. It may be useful for