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Impulse Characteristics of Ground Electrodes in Low Resistivity Soil
IEEJ Transactions on Electrical and Electronic Engineering, 2023Soil properties have been known to be the factors that influence the ionization process in soil, which cause the impulse impedance, Zimpulse to be lower than that at steady state resistance, RDC. Many studies have established the relationship between the percentage reduction of Zimpulse from RDC in such that the percentage reduction is more pronounced ...
Mohamad Nor, Normiza +1 more
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A New Impulse Grounding Resistance Measuring Instrument
Applied Mechanics and Materials, 2010This paper introduces a convolution calculation method first, and thus to design a portable shock resistance measuring instrument. With the MATLAB simulation of software and field measurements of the measurement instrument, obtain the satisfactory results, thus proving the usefulness of this method.
Wen Jin Dai, Kai Wang
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Impulse Grounding Resistance of Graphite Flexible Grounding Material under Spark Effect
Applied Mechanics and Materials, 2017Graphite flexible grounding material is an environmentally friendly material with corrosion resistant, non-magnetic and flexible characteristic, which is gradually applied to grounding of transmission lines in recent years. In order to provide a reference for grounding grid design and impulse resistance measurement, an iterative calculation method ...
Peng Cheng Zhang, Yuan Xun, Zhao Bo
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Measurements of grounding resistances for high impulse currents
IEE Proceedings - Generation, Transmission and Distribution, 1998The paper presents field measurements of surge characteristics of a concrete pole, a buried single conductor and a grounding net for high-impulse currents with a maximum magnitude of 40 kA and with a wavefront duration of a few microseconds. The measured results show that the grounding resistances are greatly dependent on the applied currents and have ...
S. Sekioka +3 more
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The measurement of impulse grounding resistance and inductance of grounding network
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137), 2002It is well known that accurate measurement of grounding resistance and inductance under impulse voltage is of great importance for safe operation of electrical and electronic equipment. It is the behavior of grounding objects under impulse voltage instead under DC voltage that determine the safe operation of equipment.
null Chen Yunping +2 more
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Analysis of test circuits for measuring impulse grounding resistance
Eurocon 2013, 2013The Paper comprises research about influential parameters on test circuits which are used for exploring impulse grounding characteristics. On the basis of conducted experimental research on horizontal grounding, using atmospheric discharge currents, amplitudes of 2.5 kA and 2.3 kA, front time of 4 μs, obtained the impulse characteristics of these ...
Zijad Bajramovic +3 more
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2017 2nd IEEE International Conference on Integrated Circuits and Microsystems (ICICM), 2017
In order to study the influence of vertical grounding electrode on impulse grounding resistance of substation ground network, the grounding model was built in COMSOL, and the impulse grounding resistances of substation grounding grid in different distribution, length and quantity of vertical grounding electrode were simulated and calculated.
Lijun Zhou +5 more
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In order to study the influence of vertical grounding electrode on impulse grounding resistance of substation ground network, the grounding model was built in COMSOL, and the impulse grounding resistances of substation grounding grid in different distribution, length and quantity of vertical grounding electrode were simulated and calculated.
Lijun Zhou +5 more
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Conformation Optimization Based on Impulse Grounding Resistance for Ground Electrode of Power Lines
Advanced Materials Research, 2014Reducing tower ground’s impulse grounding resistance can prevent the power lines from lightning effectively. The concept of impulse grounding resistance is described. Calculation formula of the impulse grounding resistance for ground electrode in different Conformations is derived with impulse coefficient method.
Guang Zu Ge +4 more
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