Evaluation in Laboratory of the Visual Corona and Electric Field Measurement Techniques to Inspect Polymeric Insulators

Hernández-Corona, R.; Ramírez-Vázquez, Isaías; Montoya-Tena, G.

doi:10.1109/tdc.2006.1668565

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…Lightning surges can strike transmission line (TL) towers, guard wires, and the ground near the TLs, inducing voltage and causing back-flashover (BF) across the insulator string, which can result in a fault event. Direct lightning strikes to the TL phases can also cause shielding failure [4,5]. Therefore, it is important to explore the optimal techniques, including financial and technical aspects, for improving the performance of TLs against lightning strikes.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%