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- Title
Tunning the Parameters for the FFT Analysis of Waveforms Acquired from a Power Plant.
- Authors
Nicolae, Ileana-Diana; Nicolae, Petre-Marian; Nicolae, Marian-Ştefan
- Abstract
The paper is focused on the FFT-based PQ analysis of waveforms corresponding to voltages and currents acquired from a generator operating in the Power Plant Turceni, Romania. The analysis considers test sets of generated signals, with known magnitude, harmonic order and phase difference, similar to those provided by Data Acquisition Systems already operating in critical points from the power plant. Two types of data sets are considered: sets consisting in groups of 8 samples acquired simultaneously from 8 waveforms (193 samples per period of individual phase current or voltage) and respectively sets of data consisting in 1576 samples per period of phase currents or voltages. The main RMS parameters (fundamental, distorting and total) were calculated in different ways in order to estimate the errors generated by simulation for both types of data sets, using a spline interpolation and respectively a shape-preserving piecewise cubic interpolation. We considered the influence of: number of samples, number of points used by interpolation and respectively of interpolation method when all the characteristic parameters of the test signals (phase difference, magnitude and order of harmonics) were uniformly varied such as to cover all operational ranges. An extended study over the minimal and maximal errors generated by simulation was made and indices for errors evaluation (IEE) were proposed. IEE proved to be very useful tools in tuning the parameters for the FFT analysis, such as to get an acceptable accuracy with decent consumptions of computational resources.
- Subjects
POWER plants; ELECTRIC power; ELECTRICAL energy; ENERGY consumption; ELECTRIC generators
- Publication
Acta Electrotehnica, 2015, Vol 56, Issue 3, p219
- ISSN
1841-3323
- Publication type
Article