SATEC PM180 Operation Manual - Manual (Page 21)

‎Chapter 2 Device Description Metering
PM180 Substation Automation Unit 19
Harmonic Measurements
The PM180 provides harmonic measurements on four voltage channels V1-V4 and
four standard range (20A/10A) current channels I1-I4. To avoid erroneous harmonic
readings when the high fault currents saturate current channels, the harmonics
registers are not updated at the time of the fault.
The FFT analysis is performed over a 10-cycle waveform for 50Hz and 12-cycle
waveform for 60Hz system, sampled at a rate of 128 samples per cycle. This gives
spectrum components up to the 63
rd harmonic.
The following table lists harmonic quantities provided by the device.
Parameter Label
Total Harmonics
Voltage THD V1 THD - V4 THD
Current THD I1 THD - I4 THD
Current TDD I1 TDD - I4 TDD
Current K-factor I1 KF - I4 KF
Voltage Crest-factor V1 CF - V4 CF
Current Crest-factor I1 CF - I4 CF
Total Interharmonics
Voltage THD V1 THD/I - V4 THD/I
Current THD I1 THD/I - I4 THD/I
Individual Harmonics
V1 Odd/even-harmonic distortion V1 %HD1 - V1 %HD63
V2 Odd/even-harmonic distortion V2 %HD1 - V2 %HD63
V3 Odd/even-harmonic distortion V3 %HD1 - V3 %HD63
V4 Odd/even-harmonic distortion V4 %HD1 - V4 %HD63
I1 Odd/even-harmonic distortion I1 %HD1 - I1 %HD63
I2 Odd/even-harmonic distortion I2 %HD1 - I2 %HD63
I3 Odd/even-harmonic distortion I3 %HD1 - I3 %HD63
I4 Odd/even-harmonic distortion I4 %HD1 - I4 %HD63
V1 Odd-harmonic voltage V1 H01 - V1 H63
V2 Odd-harmonic voltage V2 H01 - V2 H63
V3 Odd-harmonic voltage V3 H01 - V3 H63
V4 Odd-harmonic voltage V4 H01 - V4 H63
I1 Odd-harmonic current I1 H01 - I1 H63
I2 Odd-harmonic current I2 H01 - I2 H63
I3 Odd-harmonic current I3 H01 - I3 H63
I4 Odd-harmonic current I4 H01 - I4 H63
Three-phase total odd-harmonic kW kW H01 - kW H63
Three-phase total odd-harmonic kvar kvar H01 - kvar H63
Three-phase total odd-harmonic PF PF H01 - PF H63
Symmetrical Components
Positive-sequence voltage V PSEQ
Negative-sequence voltage V NSEQ
Zero-sequence voltage V ZSEQ
Negative-sequence voltage unbalance V NSEQ UNB%
Zero-sequence voltage unbalance V ZSEQ UNB%
Positive-sequence current I PSEQ
Negative-sequence current I NSEQ
Zero-sequence current I ZSEQ
Negative-sequence current unbalance I NSEQ UNB%
Zero-sequence current unbalance I ZSEQ UNB%
Fundamental Phasors
Voltage magnitude V1 Mag - V4 Mag
Current magnitude I1 Mag - I4 Mag
Voltage angle V1 Ang - V4 Ang
Current angle I1 Ang - I4 Ang