Chapter 6
– Records
RPV311
138
RPV311-TM-EN-7
Current total harmonic
distortion
Quadratic average
Fundamental active
Power
Simple average
Fundamental reactive
Power
Simple average
DC transducers
Simple average
The aggregation time interval is user-selectable between 1 minute or 10 minutes,
synchronized to UTC minute rollover. The timestamp refers to the end of the
averaging window.
It generates one record per day.
4.2
Harmonics
Harmonics are computed for phases A, B and C and for the neutral of up to two
voltage or current circuits. The algorithm used conforms to IEC 61000-4-7:1991.
The signal is band-limited by Hanning-windows with width
𝑇
𝑤
= 200 ms, overlapped
every
𝑇
𝑤
2
= 100 ms.
A Fourier transform is used to obtain all frequency components of the input signal up
to the 50
𝑡ℎ
order.
The values obtained at every measuring window are aggregated over
𝑇
vs
= 3 s.
Values resulting of the
𝑇
vs
= 3 s aggregation are aggregated a second time over
𝑇
sh
=
10 min using classifiers. The result is the cumulative probability for each harmonic
component of the input signal.
For each harmonic component of the input signal, the value that does not exceed the
𝑝
= 1, 10, 50, 90, 95, and 99 % percentiles in the
𝑇
sh
time interval is recorded.
4.3
Flicker
Flicker is computed for phases A, B, and C for up to six voltage circuits. The algorithm
used conforms to IEC 61000-4-15:1997+A1:2003.
The aggregation time interval is 10 minutes in the Pst Flicker or Plt Flicker 2 hours,
synchronized to UTC minute rollover. The timestamp refers to the end of the
averaging window.
It generates one record per day.
5
SOE - Sequence of Events Records
All variations of the equipment inputs occurred are recorded on this record.
The events in the SOE are recorded with accuracy better than 100µs.
It generates one record per day.
Содержание RPV311
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Страница 99: ...RPV311 Chapter 5 Operation RPV311 TM EN 7 99 Figure 46 Status monitoring sequence ...
Страница 101: ...RPV311 Chapter 5 Operation RPV311 TM EN 7 101 Figure 47 Monitoring sequence ...
Страница 104: ...Chapter 5 Operation RPV311 104 RPV311 TM EN 7 Figure 49 Records monitoring sequence harmonics flicker and SOE ...
Страница 106: ...Chapter 5 Operation RPV311 106 RPV311 TM EN 7 Figure 50 Equipment settings monitoring sequence ...
Страница 107: ...RPV311 Chapter 5 Operation RPV311 TM EN 7 107 Figure 51 Circuit and channel settings monitoring sequence ...
Страница 108: ...Chapter 5 Operation RPV311 108 RPV311 TM EN 7 Figure 52 Relays PMU and MODBUS settings monitoring sequence ...
Страница 110: ...Chapter 5 Operation RPV311 110 RPV311 TM EN 7 Figure 53 General information monitoring sequence ...
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Страница 265: ...Chapter 17 Technical Specifications RPV311 RPV311 TM EN 7 265 Figure 142 RPV311 Dimensions ...
Страница 275: ...Chapter 17 Technical Specifications RPV311 RPV311 TM EN 7 275 Figure 143 RA331 RA332 and RA333 dimensions ...
Страница 279: ...RPV311 Appendix A Equipment Log RPV311 TM EN 7 279 ...