1,721,111 research outputs found
Demodulation of complex baseband radar signals for the analysis of multiple narrow spectral lines
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A Formal Approach to the Verification of Protection Systems in Low-Voltage Distribution Grids
No full textGabor-like transforms for transient analysis in electrical systems
No full textThe Gabor transform is a time-frequency transform in which the signals are expressed as the sum of wavelets of sinusoidal form and Gaussian amplitude variation. In this paper, we propose the Gabor transform as a measurement technique useful for detection and analysis of short-time transient phenomena. In particular, our purpose is to detect partial discharges, which show up as very short pulses added to the low frequency power carrier. Capabilities of a Gabor-like algorithm for partial discharge detection are discussed in the paper, as well as the influence of mathematical and instrumental parameters on the performance of the method
Identification of Induction Motors Using Smart Circuit Breakers
Full text linkThe problem of estimating the parameters of induction motor models is considered, using the data measured by a circuit breaker equipped with industrial sensors. The breaker acquires three-phase stator voltage and current derivative, which are used to formulate an optimization-based identification problem. This setup is novel with respect to the literature, where voltage and current are used. Several algorithmic aspects and improvements are discussed. The presented experimental results indicate that the circuit breaker is able to accurately estimate the machine parameters. The identified motor models can then be used for several applications within a smart grid scenario
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