App-6
IM 253710-01E
Note
•
k, r, and j denote the harmonic order, real part, and imaginary part, respectively.
•
min denotes the minimum order. You can select 0 (DC component) or 1 (Fundamental signal
component) for the minimum order. For details, see section 10.7.
•
max denotes the upper limit (see section 17.5) of the harmonic order under analysis. The
upper limit is automatically determined from the frequency of the PLL source (maximum is 500).
•
The numerical data of Speed, Torque, Sync, and Slip are 0th order (DC) components. The
default setting of the minimum order (Min Order) in the harmonic measurement mode is 1. To
display the numerical data of Speed, Torque, Sync, and Slip, the minimum order must be set to 0.
•
The numerical data of Torque in the normal measurement mode are simple averaged values.
The numerical data of each harmonic component and the total of Torque in the harmonic
measurement mode are RMS values. The numerical data that correspond to the same value
as the normal measurement mode are displayed at Trq(dc).
•
The numerical data of Sync and Slip are displayed only when the PLL source (fU or fI) and
frequency synchronization source (Sync Speed Source) are set to the same channel.
•
Apparent power (S) or reactive power (Q) of the PZ4000’s harmonic measurement mode may
differ from the measured values of the PZ4000’s normal measurement mode or those of other
instruments that use different measurement principles.
The characters/values inside the ( ) of the measurement function are either
dc (k = 0) or k (k = 1 to max.)
Measurement Functions
in the Harmonic
Measurement Mode
Determination, Equation
(Table 2/2)
U(k)
U
U(k)
U(1)
•
100
•
100
P(k)
P
P(k)
P(1)
•
100
I(k)
I
I(k)
I(1)
•
100
•
100
k = 2
max
U(k)
2
U
•
100
k = 2
max
U(k)
2
U(1)
•
100
k = 2
max
P(k)
P
•
100
k = 2
max
P(k)
P(1)
•
100
k = 2
max
I(k)
2
I
•
100
k = 2
max
I(k)
2
I(1)
•
100
{
λ
(k)
•
U(k)
}
2
1
U
k = 1
max
•
100
{
λ
(k)
•
I(k)
}
2
1
I
k = 1
max
•
100
λ
(k)
: Coefficient as defined by the applicable standard
(IEC34-1(1996)
)
T(k)
: Coefficient as defined by the applicable standard
(IEEE Std 100(1992)
)
Uthf =
Ithf =
{T(k)
•
U(k)
}
2
1
U
1
U
k = 1
max
{T(k)
•
I(k)
}
2
1
I
1
I
k = 1
max
Utif =
Itif =
U(k)
2
k
k = 2
max
•
100
I(k)
2
k
k = 2
max
•
100
hvf =
hcf =
Of the voltage (
fU
) and current (
fI
), the frequency of the signal that is selected as the
PLL
source is displayed. The display of the signal that is not selected shows a bar.
When the denominator of the equation
for the distortion factor is Total
When the denominator of the equation
for the distortion factor is Fundamental
Harmonic distortion factor of voltage
Uhdf( ) [%]
Total harmonic distortion of voltage
Uthd [%]
Harmonic distortion factor of active power
Phdf( ) [%]
Harmonic distortion factor of current
Ihdf( ) [%]
Total harmonic distortion of active power
Pthd [%]
Total harmonic distortion of current
Ithd [%]
Telephone harmonic factor of voltage
Uthf [%]
Telephone harmonic factor of current
Ithf [%]
Telephone influence factor of voltage
Utif
Telephone influence factor of current
Itif
Harmonic voltage factor
hvf [%]
Harmonic current factor
hcf [%]
Voltage frequency
fU (FreqU) [Hz]
Current frequency
fI (FreqI) [Hz]
Note
•
k denotes harmonic order.
•
max denotes the upper limit (see section 17.5) of the harmonic order under analysis. The
upper limit is automatically determined from the frequency of the PLL source (maximum is 500).
Appendix 2 Symbols and Determination of Measurement Functions
