A Study on the Practical Grounding System in Power Distribution Lines

Miyazaki, Teru; Okabe, Shigemitsu; Aiba, Kiyoshi; Hirai, Takao; Yue, Jun

doi:10.1541/ieejpes.127.424

Cited by 4 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Indirect lightning strikes have long been studied [1,2], and appropriate countermeasures have been basically established. In recent years, the focus of lightning protection research has shifted to direct lightning strikes, and lightning surge analysis using EMTP (Electro-Magnetic Transients Program) has been applied to lightning protection effects of overhead ground wires and surge arresters [3,4], burnout of surge arresters [5,6], grounding optimization of surge arresters [7,8], etc.…”

Section: Introductionmentioning

confidence: 99%

“…Most available studies of direct lightning strikes on distribution lines [3][4][5][6][7][8] consider mild lightning currents with wavefront length of several microseconds, and no reports on steep lightning currents have been published. In many actual waveforms of lightning current, the wavefront rises gradually at first but then rises steeply [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A distribution line model for lightning overvoltage studies

Matsuura

Noda

Asakawa

et al. 2010

Electrical Engineering Japan

View full text Add to dashboard Cite

SUMMARYRecently, the focus of lightning protection measures for distribution lines has moved from a nearby lightning stroke to a direct lightning stroke. Studies of direct lightning stroke countermeasures are generally carried out by digital simulations using the EMTP (Electro-Magnetic Transients Program). Thus, components of a distribution line must be modeled appropriately in the EMTP for accurate simulations.The authors have previously clarified the surge response of a distribution line by pulse tests using a reducedscale distribution line model. In this paper, first, the results of the pulse tests are simulated in the EMTP using a conventional model which represents a distribution pole by a single lossless distributed-parameter line model, and comparisons with the test results show that transient overvoltages generated at the insulators cannot accurately be reproduced by the conventional model. This indicates that a special treatment is required to represent the transient response of a distribution pole and wires. Then, this paper proposes new EMTP models of the pole and wires which can reproduce the transient overvoltages at the insulators. The parameter values of the proposed models can be determined based on a pulse test result.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A distribution line model for lightning overvoltage studies

Matsuura

Noda

Asakawa

et al. 2010

Electrical Engineering Japan

View full text Add to dashboard Cite

show abstract

“…，EMTP(Electro-Magnetic Transients Program)を用いた解析により，架空地線や避雷器の保護効果に関する検討 (4) (5) ，避雷器の焼損に関する検討(6) (7) ，避雷器の接地合理化に関する検討(8) (9) 等が行われている。 * (財)電力中央研究所電力技術研究所〒 240-0196 横須賀市長坂 2-6-1 Electric Power Engineering Research Lab., CRIEPI 2-6-1, Nagasaka, Yokosuka 240-0196 1 の配電線縮小モデルを用いたサージ実験(以下，「縮小モデル実験」と記す)を行い，波頭長が 0.3 μs 以下の急峻な雷電流に対する配電線のサージ特性を明らかとした (11) 。また，筆者らは，この縮小モデル実験で得られた知見を基に，これまでの EMTP 解析に使用されてきた配電線モデル (5) では再現できなかった短時間領域における雷過電圧を再現可能な配電線モデルを構築した (12) 。しかしながら，縮小モデル実験では，大地の抵抗率，テーパのある鉄筋コンクリート柱の構造，金物や碍子等の小さな部材，等の全てを正確 c 2008 The Institute of Electrical Engineers of Japan. 11 本の鉄筋コンクリート柱(以下，「コン柱」と記す)と高圧電線 3 条，架空地線 1 条が 10 径間架線された線路から構成されており，亘長は 430 m である。高圧電線には OC 60 mm 2 ，架空地線には鋼より線 22 mm 2 を用いており，末端の 1 号柱と 11 号柱では反射が生じないように架空地線，高圧電線とも整合終端されている。この試験用配電線の中央に位置する 6 号柱への雷撃を想定した。6 号柱の装柱を Fig.…”

unclassified

実規模配電線雷サージ特性の測定と配電線解析モデルの検証

et al. 2008

View full text Add to dashboard Cite

Recently, the focus of lightning protection measures has moved to overvoltages due to direct lightning strokes. Studies of such overvoltages require simulations using the EMTP, and components of a distribution line must be modeled appropriately in the EMTP simulation environment. The authors have proposed an EMTP model of a distribution line in a separate paper.This paper consists of two parts. The first part presents surge characteristics of a distribution line obtained by measurement using an actual-scale test distribution line. The actual-scale distribution line includes a reinforced concrete pole, a ground wire, phase wires, and a lightning channel (Fig. 1). Especially, the result reveals noteworthy characteristics of the surge impedance of a reinforced concrete pole and the wavefront-time dependence of insulator voltages. The second part presents validation of the distribution line model previously proposed by the authors.

show abstract

Lightning surge characteristics of an actual distribution line and validation of a distribution line model for lightning overvoltage studies

Matsuura

Noda

Asakawa

et al. 2010

Electrical Engineering Japan

View full text Add to dashboard Cite

SUMMARYFor distribution lines in Japan, protection measures against lightning-induced overvoltages have been taken and can be considered almost complete. The focus of lightning protection measures has moved to overvoltages due to direct lightning strokes. Studies of such overvoltages require simulations using the EMTP (Electro-Magnetic Transients Program), and components of a distribution line must be modeled appropriately in the EMTP simulation environment. The authors have proposed an EMTP model of a distribution line in a separate paper. This paper consists of two parts. The first part presents surge characteristics of a distribution line obtained by measurement using an actualscale test distribution line. In particular, the result reveals noteworthy characteristics of the surge impedance of a reinforced concrete pole and the wavefront-time dependence of insulator voltages. The second part presents a validation of the distribution line model previously proposed by the authors. The validation shows that the distribution line model accurately reproduces the measured voltage and current waveforms for various wavefront times of the injected currents.

show abstract

A Study on the Practical Grounding System in Power Distribution Lines

Cited by 4 publications

References 3 publications

A distribution line model for lightning overvoltage studies

A distribution line model for lightning overvoltage studies

実規模配電線雷サージ特性の測定と配電線解析モデルの検証

Lightning surge characteristics of an actual distribution line and validation of a distribution line model for lightning overvoltage studies

Contact Info

Product

Resources

About