Behavior of spark gaps with different gap distances

Halász, Balint G.; Németh, Balázs; Göcsei, Gábor

doi:10.1109/eic.2017.8004628

Cited by 1 publication

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The form of EGLA's Type 2 air gap is made up of a composite insulator and air, as shown in Fig. 5, with gap distance depending on the voltage range used in the system and also the sphere diameter used according to IEEE 516-2009 standard shown in Table 7 [16]. The air gap and composite insulator type are represented by the paralleled capacitors C o and C c , respectively, where the composite material used is the ceramic (Si 3 N 4 ) material with relative permittivity (ε r ) equals 8.3 [10], [17].…”

Section: B Externally Gapped Line Arrester Modellingmentioning

confidence: 99%

Induced Overvoltage Caused by Indirect Lightning Strikes in Large Photovoltaic Power Plants and Effective Attenuation Techniques

et al. 2022

View full text Add to dashboard Cite

Indirect Lightning Stroke (ILS) is considered an urgent issue on overall power systems due to its sudden dangerous occurrence. A grid-connected solar Photovoltaic (PV) power plant of 1MW was considered and analyzed using PSCAD/EMTDC software. The effect of grounding grid resistance (R g ) on the induced voltages caused by the indirect strokes was discussed. The Transient Grounding Potential Rise (TGPR) variation with R g was presented and discussed. Four different models were proposed and installed for the system under study, which includes a combination of the Externally Gapped Line Arrester (EGLA) with the Non-Gapped Line Arrester (NGLA). The results show that when the R g was reduced from 5 to 1 ohm, TGPR decreased by about 79.63%, whereas the peak value was reduced by about 91.3% nearby the striking position. Four models of EGLAs were proposed to reduce the induced transient overvoltage effectively. The four models showed a remarkable ability to reduce the backflow current (BFC) and, consequently, the induced overvoltage. The EGLA's type with the composite air gap reduced the TGPR by about 77.04 % and reduced the induced overvoltage nearby the striking position by about 51.3%.INDEX TERMS ILS, EGLA, NGLA, backflow current (BFC), PV, grounding grid design (GGD), composite insulator, discharge voltage.

show abstract

Section: B Externally Gapped Line Arrester Modellingmentioning

confidence: 99%