PMU
Phasor Measurement Unit Quiz
Test your knowledge on Phasor Measurement Units (PMU) with our comprehensive quiz! Designed for engineers, students, and professionals looking to enhance their understanding of PMU technology.
- 27 detailed questions
- Multiple choice format
- Ideal for both beginners and experts
A phasor measurement unit is a device which reports the magnitude and phase angle
True
False
A phasor is characterized by at least two frequencies
True
False
PMUs usually use external GPS signal for their synchronization
True
False
PMU measurements can be used to estimate the frequency and the rate of the change of the frequency (ROCOF)
True
False
There is still no standard for PMU
True
False
PMU measurements allow the differential protection of the high voltage lines with FACTS
True
False
A Phasor Measurement Units (PMU) is a device mostly microprocessor based
True
False
PMU reports only the magnitude of an analog and /or derived phasor with respect to the global time reference, as per the synchro-phasor standards.
True
False
In addition to the problem of the measurement noises which does exist always, the PMU itself also causes a latency derived from number of cycles and processing time.
True
False
Although most of the commercial PMUs use 1-cycle widow, one way to reduce the noise is to use an average value by measuring 2 or 4 cycles.
True
False
To achieve accurate timing signal, we must use internal synchronizing source.
True
False
In case of using internal synchronization, source GPS antenna is not required
True
False
In case of the external timing source, the timing signal is provided to the PMU by means of an external source, which may be local or global, and a distribution infrastructure which is based on broadcast or direct connections.
True
False
To achieve better measurement results in case of using PMU, a fractional cycle window is used.
True
False
If the frequency of the input signal is different from the nominal frequency, a magnitude and angle correction must be applied to account for the frequency deviation.
True
False
It is assumed that the input signal has been filtered according the requirement of the Nyquist criterion for the selected sampling rate.
True
False
. It is possible to achieve a noiseless ROCOF measurement using difference between two consecutive phase angles.
True
False
Phase angle depends on the timing reference
True
False
PMU standard uses UNIX time base with a ‘‘second-of-century’’ (SOC) counter
True
False
In addition to GPS system, synchronizing signals can also be disseminated by terrestrial fiberoptic systems.
True
False
The precision time protocol (PTP) used to synchronize clocks throughout a computer network can achieve clock accuracy in the ms range.
True
False
IIn order to achieve interoperability among PMUs made by different manufacturers, it is essential that all PMUs follow a common standard
True
False
Standards consider a PMU frequency deviation with a range of ±5 Hz from the nominal frequency.
True
False
Accuracy of the synchro-phasor measurement is described by TVE
True
False
P performance class, allows slower response and longer delay
True
False
PMU measurements allow real-time calibration of current
True
False
The easy availability of synchronized measurements using GPS technology and the improvement in communication technology makes it possible to consider true differential protection of transmission lines and cables.
True
False
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