Overview of Transient Simulations of Grounding Systems under Surge Conditions

Kisielewicz, T.; Cuenca, Milton

doi:10.3390/en15207694

Cited by 3 publications

(2 citation statements)

References 48 publications

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“…GB1 is the grounding body which can be characterized as a distributed network under lightning currents. The model and parameters of the grounding body refer to [28, 29].…”

Section: Simulation Modelmentioning

confidence: 99%

Research on the arcing horn with active arc extinguishing function for HVDC grounding electrode line

Liu

Yang

Guo

et al. 2023

IET Generation Trans & Dist

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The grounding electrode line is an important part of the Ultra high voltage direct current (UHVDC) transmission system. It acts as the channel to conduct the unbalanced current and the grounding current.The arcing horn consists of a pair of electrodes installed in parallel at both ends of the insulator string, which provides a discharge channel for the fault current by an air gap to protect the insulators. In this paper, the voltage and current distributions of the arcing horn were studied when the grounding electrode line was struck by lightning. It is found that the current and voltage gradually decrease along the direction from the converter station to the earth electrode. An active arc extinguishing method based on variable resistance for arcing horn was proposed. An electromagnetic transient simulation model of the grounding electrode line is established based on the electrical parameters of a ±800 kV UHVDC transmission system. It is found that the absorbed energy of the arc extinguishing unit needs to be at least 31.2 and 49.6 kJ when the lightning current is 20 and 50kA, respectively. According to the calculation results, the arcing horn with arc extinguishing unit was developed and tested. The test results verifies that the designed arcing horn can meet the requirements of engineering application.

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“…GB1 is the grounding body which can be characterized as a distributed network under lightning currents. The model and parameters of the grounding body refer to [28, 29].…”

Section: Simulation Modelmentioning

confidence: 99%

Research on the arcing horn with active arc extinguishing function for HVDC grounding electrode line

Liu

Yang

Guo

et al. 2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…The transfer function shows the partial fractions sum in which every part has been shown as a branch in the circuit with a certain admittance. In the end, the produced circuit has been completed by the parallel branches connection [22][23][24][25][26].…”

Section: Frequency Grounding System Modelmentioning

confidence: 99%

Externally gapped line arresters placement effect on transmission line lightning performance including the frequency response of the grounding system

Khodsuz

2023

IET Generation Trans & Dist

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This paper conducts the frequency‐dependent grounding system impact on externally gapped line arresters (EGLAs) operation and their placement effects on the lightning performance of a transmission line (TL). The study involves placing EGLAs at different phases of a 400‐kV double‐circuit TL with two downstream shield wires and selecting the optimal state with fewer back‐flashover incidents. The results show that using a non‐linear grounding system leads to a higher back return current from insulators or EGLAs, resulting in a higher flashover rate compared to the frequency grounding system (FGS). Installing four EGLAs in the middle and upper phases of the TL provides satisfactory lightning protection, and the flashover probability is zero and 4.2% for the FGS and the non‐linear grounding system, respectively. A sensitivity analysis including soil resistor variation, economic analysis, and grounding electrode configuration has been performed that confirms installing downstream shield wires and EGLAs is an effective and economical technique for lightning protection.

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A Comprehensive Review of Shipboard Power Systems with New Energy Sources

et al. 2023

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A new energy ship is being developed to address energy shortages and greenhouse gas emissions. New energy ships feature low operational costs and zero emissions. This study discusses the characteristics and development of solar-powered ships, wind-powered ships, fuel cell-powered ships, and new energy hybrid ships. Three important technologies are used for the power system of the new energy ship: new-energy spatio-temporal prediction, ship power scheduling, and Digital Twin (DT). Research shows that new energy spatio-temporal prediction reduces the uncertainty for a ship power system. Ship power scheduling technology guarantees safety and low-carbon operation for the ship. DT simulates the navigational environment for the new energy ship to characterize the boundary of the shipboard's new energy power generation. The future technical direction for new energy ship power systems is also being discussed.

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Overview of Transient Simulations of Grounding Systems under Surge Conditions

Cited by 3 publications

References 48 publications

Research on the arcing horn with active arc extinguishing function for HVDC grounding electrode line

Research on the arcing horn with active arc extinguishing function for HVDC grounding electrode line

Externally gapped line arresters placement effect on transmission line lightning performance including the frequency response of the grounding system

A Comprehensive Review of Shipboard Power Systems with New Energy Sources

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