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Power Quality Measurement System With PMU Functionality Based on Interpolated Sampling
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DOI：10.1109/TIM.2018.2863458.png)
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摘要
En 中文
A power quality measurement system is introduced in this paper. While sampling with a high rate, it provides mains frequency synchronous voltage and current data in the form of 215 samples per cycle using a linear interpolation unit. The interpolation output sampling rate is provided by a mains frequency estimation unit, which conducts phase locking on the voltage measurements and additionally outputs the synchrophasor, frequency, and the rate of change of frequency. This algorithm is checked in simulations against the current standards, while discussing a phenomenon that is not yet taken into account by these standards: low-frequency interharmonic disturbances such as ripple control signals, which occur frequently in today's power grids. To desensitize the system toward these, compromises must be taken when it comes to standard compliance under transient conditions. Thereafter, first measurements with an evaluation system are analyzed to get a first impression of the system response to real signals.
Keyword:
Control system
disturbance
interharmonic
interpolation
mains frequency
phasor measurement unit (PMU)
power quality (PQ)
ripple control signals (RCSs)
standard compliance
synchrophasor
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5.9
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2.0W
被引数:
5.8W
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