On the measurement of tower-footing impedance/resistance

被引：0
|
作者：
Visacro, Silverio [1 ]
Vale, Maria Helena M. [1 ]
Pereira, Barbara [1 ]
Silveira, Fernando H. [1 ]
机构：
[1] UFMG Fed Univ Minas Gerais, LRC Lightning Res Ctr, Belo Horizonte, Brazil
来源：
ELECTRIC POWER SYSTEMS RESEARCH | 2024年 / 234卷
关键词：
Lightning response of tower -footing electrodes; Tower -footing impulse impedance; Tower -footing resistance; Measurement of the tower -footing impedance; and resistance; LIGHTNING SURGE RESPONSE; GROUNDING ELECTRODES;
D O I：
10.1016/j.epsr.2024.110618
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This work addressed concepts of concise parameters that can be quantified by means of measurement for qualifying the lightning response of tower-footing electrodes, namely the first return stroke impulse impedance ZP, the low frequency resistance RLF and the 25 kHz harmonic impedance Z25kHz. The significant difference among the values of these parameters for any given arrangement of electrodes buried in the same soil was highlighted, along with their use for estimating the expected lightning response of the transmission line (TL) tower. The difficulties for implementing the methodologies for measurement of RLF and Z25kHz were analyzed, and respective solutions were recommended. The overcoming of the challenge of determining reliable values of ZP from measured values of the two other parameters was addressed as well.
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页数：7
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