Fluke 6135A/PMU, Руководство оператора

Страница: 158 / 160

6135A/PMU
Operators Manual
A-2
Harmonics
A waveform that is an integral multiple of the fundamental frequency. For
example, a waveform that is twice the frequency of a fundamental is called the
second harmonic.
Interactive Test
Testing method that requires the user to configure, run, and evaluate the test data.
Measured Data
The data from the UUT.
Measurement Latency
Latency in measurement reporting is the time delay from when an event occurs
on the power system to the time that it is reported in data.
Parameters
Independent variables in a measurement process such as temperature, humidity,
test lead resistance, etc.
Phasor
A PMU reports the phase angle and magnitude of voltage and current. The
combination of phase angle and magnitude for a voltage or a current are
described by a vector referred to as a “Phasor”. More formally a phasor is a
complex equivalent of a sinusoidal wave quantity such that the complex modulus
is the cosine wave amplitude, and the complex angle (in polar form) is the cosine
wave phase angle.
PMU Personality
The UUT personality profile is a file that stores unique information such as
manufacturer information and phase order for each UUT and can be changed
with the Calibration Software.
Raw Data
Data from the 6135A System. See “Actual Data”.
RFE
Rate of Change of Frequency Error or “RFe” is the measure of error between the
input rate of change of frequency and the measured rate of change of frequency
for the given instant of time in hertz per second (Hz/sec
2
). To calculate RFe, this
basic formula can be used:
RFE = Rate of change of Frequency Measurement Error =
|(df/dt)
reference
– df/dt)
measured
|
Where:
•
(df/dt)
reference
is the reference rate of change of the frequency
•
(df/dt)
measured
is the PMU measured rate of change of frequency