The random varying loads and their impacts on the performance of smart grids

Iqteit, Nassim; Arsoy, Ayşen Basa; Çakır, Bekir

doi:10.1016/j.epsr.2022.107960

Cited by 3 publications

(6 citation statements)

References 18 publications

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“…When modeling random processes to study heating phenomena, it is possible to replace one type of autocorrelation function with another, because the determining factor in this case is the energy of the random process, which is related to the area under the autocorrelation function curve. For example, when replacing an exponential-cosine autocorrelation function of the form ( 16) with an exponential one of the form (15), its damping coefficient will be determined by the expression found in the equality of the areas under the curves of autocorrelation functions (15) and ( 16) [26].…”

Section: Fast-varying Non-linear Loadsmentioning

confidence: 99%

Section: Fast-varying Non-linear Loadsmentioning

confidence: 99%

Section: Tionmentioning

confidence: 99%

“…As an example, Figure 2a shows one of the implementations of the current curve of phase A of the arc furnace for melting EAF-100 steel, which is an amplitude-modulated oscillation in accordance with the expression (13). The modulating random process () t  is given by an exponential autocorrelation function (15), where the variance of the current oscillations is 2b shows the corresponding frequency spectrum of the phase A network current curve of the EAF-100 furnace, obtained using a fast Fourier transform directly from the simulated current curve. Figure 3a shows one of the implementations of the current curve of phase A of the EAF-100 furnace, which is an amplitudemodulated oscillation, where the random modulation process () t  is determined by an exponential-cosine autocorrelation function of the form (16) with the parameters: Figure 3b shows the corresponding amplitude spectrum.…”

Section: Tionmentioning

confidence: 99%

“…Research related to the analysis of reactive power in power networks supplying nonlinear fast-varying loads is a new issue. The latest research publications related to time-varying loads [14][15][16][17][18] concern load variability during the day, taking into account the impact of renewable energy sources. The load changes analyzed in these works do not cause the generation of interharmonics.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Analysis of Reactive Power in Electrical Networks Supplying Nonlinear Fast-Varying Loads

Sayenko,

Pawelek,

Baranenko

2023

Energies

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This study concerns problems related to the assessment of reactive power in power networks with nonlinear fast-varying loads, such as electric arc furnaces, rolling mill drives, etc. The operation of this type of load is characterized by the introduction of interharmonic currents (including higher harmonics) into the power supply network and a relatively low power factor. Rapid changes in the RMS value of the current also cause voltage fluctuations and the related phenomenon of light-flickering. Therefore, there is a need to evaluate the power selection of compensating devices, taking into account the random nature of load changes and the distortion of current and voltage waveforms, in particular, interharmonic components, the impact of which has not been fully investigated so far. To analyze the random nature of load changes, autocorrelation functions were used, which allowed for the estimation of the expected values of the arc furnace current distortion coefficient (based on the recorded waveforms). In order to determine the parameters of reactive power compensating devices, and in particular capacitor banks, an autocorrelation function in the exponential-cosine-sine form was used, which meets the conditions of differentiation. This study contains comparative results of the reactive power of capacitor banks determined using different methods. The criterion for selecting capacitor bank parameters was the minimization of energy losses in the power supply network. The calculations presented in this study show that by taking into account higher harmonics and interharmonics in the voltage and currents of fast-varying loads, the installed power of the capacitor bank can be reduced by approximately 7%, and energy losses in the power grid can be reduced by 3–5%.

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Section: Fast-varying Non-linear Loadsmentioning

confidence: 99%

Section: Fast-varying Non-linear Loadsmentioning

confidence: 99%

Section: Tionmentioning

confidence: 99%

Section: Tionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analysis of Reactive Power in Electrical Networks Supplying Nonlinear Fast-Varying Loads

Sayenko,

Pawelek,

Baranenko

2023

Energies

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Distributed plug-in electric vehicles charging strategy considering driver behaviours and load constraints

Kang

Zheng

et al. 2023

Electric Power Systems Research

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Analysis of Reactive Power in Electrical Networks Supplying Non-linear, Fast-Varying Loads

Sayenko,

Pawelek,

Baranenko

2023

Preprint

View full text Add to dashboard Cite

The article concerns problems related to the assessment of reactive power in power networks with non-linear, fast-varying loads, such as electric arc furnaces, rolling mill drives, etc. The operation of this type of loads is characterized by the introduction of interharmonic currents (including higher harmonics) into the power supply network and a relatively low power factor. Rapid changes in the RMS value of the current also cause voltage fluctuations and the related phenomenon - flicker. Therefore, there is a need to evaluate the selection of power of compensating devices taking into account the random nature of load changes and the distortion of current and voltage waveforms, in particular interharmonic components, the impact of which has not been fully investigated so far. To analyze the random nature of load changes, autocorrelation functions were used, which allowed for the estimation of the expected values of the arc furnace current distortion coefficient (based on the recorded waveforms). In order to determine the parameters of reactive power compensating devices, and in particular capacitor banks, an autocorrelation function in the exponential-cosine-sine form was used, which meets the conditions of differentiation. The article contains comparative results of calculations of the reactive power of capacitor banks determined using different methods.

show abstract

The random varying loads and their impacts on the performance of smart grids

Cited by 3 publications

References 18 publications

Analysis of Reactive Power in Electrical Networks Supplying Nonlinear Fast-Varying Loads

Analysis of Reactive Power in Electrical Networks Supplying Nonlinear Fast-Varying Loads

Distributed plug-in electric vehicles charging strategy considering driver behaviours and load constraints

Analysis of Reactive Power in Electrical Networks Supplying Non-linear, Fast-Varying Loads

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