Analysis of the influence of non-linear loads on the measurement and billing of electrical energy compared with the CPT

Brito, V. H. F.; Kume, Guilherme Yuji; Quinalia, Mateus S.; Sachetti, M. A.; Silva, R. P. B.; Souza, Wesley Angelino de; Silva, L. C. P.

doi:10.1109/ichqp.2016.7783332

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…The wide application of semiconductor electronic devices and distributed powers has caused harmonic content in power system and serious distortion of voltage and current waveform [1,2]. The equipment such as fluorescent lamp and rolling machine will cause harmonic current.…”

Section: Introductionmentioning

confidence: 99%

Change Point Detection for Piecewise Envelope Current Signal Based on Wavelet Transform

Wang¹,

Zhou²,

Jiang³

et al. 2018

Journal of Electrical and Computer Engineering

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One of the key issues of the accurate parameters analysis for the piecewise envelope current signal is to position the change point precisely. Discrete wavelet transform (DWT) modulus maxima method can detect change point, but the detection window of DWT will cause suspicious change point. Besides, the amount of calculated data is very large in actual process of envelope current signal. Therefore, in this paper, the envelope is used instead of the original sampling data for DWT so as to reduce the calculation amount. What is more, combined with the sliding dislocation window method, the change point can be located accurately and the pseudo-change point can be eliminated. The simulation results as well as the electric locomotive current and forging machine current examples show that it is feasible to detect the change point precisely through the proposed method, which provides possibilities for real-time online monitoring of change point.

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Section: Introductionmentioning

confidence: 99%

Change Point Detection for Piecewise Envelope Current Signal Based on Wavelet Transform

Wang¹,

Zhou²,

Jiang³

et al. 2018

Journal of Electrical and Computer Engineering

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show abstract

“…The traditional electric energy meter usually works in sinusoidal linear load condition with high precision [1]. However, the use of semiconductors in electronic devices, such as compact fluorescent lamps, LEDs, and so on, introduces a lot of non-linearity and dynamic loads with a significant harmonic current content into electric power systems [2,3]. Additionally, the development of smart grids requires new energy sources, such as solar energy, wind power, etc.…”

Section: Introductionmentioning

confidence: 99%

Improved Parameter Identification Method for Envelope Current Signals Based on Windowed Interpolation FFT and DE Algorithm

Su¹,

Zhang²,

Chen³

et al. 2018

Algorithms

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Envelope current signals are increasingly emerging in power systems, and their parameter identification is particularly necessary for accurate measurement of electrical energy. In order to analyze the envelope current signal, the harmonic parameters, as well as the envelope parameters, need to be calculated. The interpolation fast Fourier transform (FFT) is a widely used approach which can estimate the signal frequency with high precision, but it cannot calculate the envelope parameters of the signal. Therefore, this paper proposes an improved method based on windowed interpolation FFT (WIFFT) and differential evolution (DE). The amplitude and phase parameters obtained through WIFFT and the envelope parameters estimated by the envelope analysis are optimized using the DE algorithm, which makes full use of the performance advantage of DE. The simulation results show that the proposed method can improve the accuracy of the harmonic parameters and the envelope parameter significantly. In addition, it has good anti-noise ability and high precision.

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Conservative power theory and its applications in modern smart grid: Review and prospect

2021

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Analysis of the influence of non-linear loads on the measurement and billing of electrical energy compared with the CPT

Cited by 5 publications

References 5 publications

Change Point Detection for Piecewise Envelope Current Signal Based on Wavelet Transform

Change Point Detection for Piecewise Envelope Current Signal Based on Wavelet Transform

Improved Parameter Identification Method for Envelope Current Signals Based on Windowed Interpolation FFT and DE Algorithm

Conservative power theory and its applications in modern smart grid: Review and prospect

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