Hioki PQ3100 - Page 226

Appx.20
Detailed Explanation of IEC Flicker and ∆V10 Flicker (available after the rmware update)
∆
V10 icker meter
∆
V10 icker
The
∆
V10 icker function is calculated using the “perceived icker curve” calculation method, which
is based on the digital Fourier transformation.
The
∆
V10 icker is dened with the following expression.
2
10
1
( )
n n
n
V a V
∞
=
∆ = ⋅∆
∑
∆Vn: RMS value [V] for voltage uctuations in frequency fn.
a
n
: Luminosity coefcient for fn where 10 Hz is 1.0. (0.05 Hz to 30 Hz)
Evaluation period: for 1 min
∆
V10 icker function diagram
Waveform Data
Voltage
Waveform
A/D
Conversion
ΔV10 Luminosity
Factor
LPF HPF FFT
Single-wave RMS
ΔV10
Square
RMS
Calculation
RMS
Calculation
Storage
ΔV10
Calculation
100 V
Calculation
One-minute
Voltage
Fluctuation
Data
One-minute RMS
Average
∆
V10 Perceived icker coefcient
Frequency [Hz]