Study on gas-water two-phase seepage law and flow characteristics of the matrix-fracture system in shale gas reservoirs. [PDF]
PLoS ONEAs a clean energy source, shale gas plays a vital role in supporting China's strategic objectives of carbon peaking and carbon neutrality through its efficient development.
Sijie He +5 more
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Energies, 2022 In this paper the design of the two channel opto-isolation circuit for measurements of the differential voltage is presented. It is used to ensure high impedance of the measuring channel(s) in the differential system to ensure the rated operation of ...
Michal Kaczmarek
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A harmonic suppression strategy for grid-connected inverters based on quadrature sinewave extractor
Frontiers in Energy Research, 2022 Grid-connected inverters need to reduce current harmonics as much as possible. After introducing the input signal’s fundamental and main harmonic quadrature components, a discrete state model is created, and the discrete observer design method is used to
Yan Xia +7 more
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Influence of Dead-Time on the Input Current Ripple of Three-Phase Voltage Source Inverter
Energies, 2023 The DC-link capacitor in power electronic systems is one of the most vulnerable components in terms of reliability. Since a reliable design of the DC-link capacitor depends on an accurate estimation of its current ripple, this paper proposes analytical ...
Juris Arrozy +4 more
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IEEE Access, 2022 This paper investigates for transformation of the distorted current the low order higher harmonic self-generation phenomenon of tested inductive current transformers.
Michal Kaczmarek, Ernest Stano
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Energies, 2022 This manuscript presents performed laboratory studies and the analysis of the impact of current shunt values used in the differential connection on the wideband metrological performance of inductive current transformers.
Michal Kaczmarek +2 more
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Why Should We Test the Wideband Transformation Accuracy of Inductive Current Transformers?
Energies, 2022 Inductive current transformers are characterized by different transformation accuracies for higher harmonics of distorted primary currents. Therefore, it is highly required to perform the tests of their metrological properties to choose the best unit ...
Ernest Stano +2 more
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Determining the Amount of Earthquake Displacement Using Differential Synthetic Aperture Radar Interferometry (D-InSAR) and Satellite Images of Sentinel-1 A: A Case Study of Sarpol-e Zahab City [PDF]
Advances in Engineering and Intelligence Systems, 2022 One of the effects of an earthquake is the creation of displacement on the land surface. It’s important to determine displacement due to natural disasters such as earthquakes.
Jacob Cherian
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Transformation of Transient Overvoltages by Inductive Voltage Transformers
Sensors, 2021 Overvoltage transients occur after any type of switching activity in a power network, such as breaker operation, fault occurrence/clearance and rapid load change. This distortion of voltage is transformed to the secondary circuit of a voltage transformer.
Michał Kaczmarek, Dariusz Brodecki
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New Approach to Evaluate the Transformation Accuracy of Inductive CTs for Distorted Current
Energies, 2023 This paper presents a newly developed method to determine the values of current error and phase displacement for the transformation of distorted current harmonics by the inductive current transformers.
Michal Kaczmarek, Ernest Stano
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