Study on Slope Tower in UHVDC Transmission Line in Mountainous Area

doi:10.11930/j.issn.1004-9649.2017.02.040.06

Abstract

Abstract: UHVDC Transmission lines are mainly across mountainous area with frequent lighting activities. Even with negative protection angle, lightning trip out rate is still high. A new type of tower, slope tower, which can reduce shielding failure rate is proposed. Its lighting protection performance is analyzed by using electrical geometry model. Combined CDEGS simulation software with empirical formula, its electromagnetic environment performance is also evaluated. The internal structure force, characteristic of economic feasibility, tower weight and amount of concrete of proposed design are also discussed. Results show that slope tower performs much better than usual T-type tower in lightning protection. Its electromagnetic environment level meets standard requirement. Tower’s inner force and construction cost is comparable with regular T-type tower. Slope tower is suitable for UHVDC transmission lines travelling through heavy lightning mountainous area.

Key words: UHVDC, slope tower, lightning shielding failure, heavy lightning mountainous area

CLC Number:

TM753

SONG Gang, CHEN Jiamiao, PAN Feng. Study on Slope Tower in UHVDC Transmission Line in Mountainous Area[J]. Electric Power, 2017, 50(2): 40-45.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.02.040.06

https://www.electricpower.com.cn/EN/Y2017/V50/I2/40

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