2015年初湖北架空线路覆冰舞动灾害原因的理论分析与应对措施

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Abstract Safe operation of power transmission lines was seriously threatened by galloping. In Hubei on January 28, 2015, severe accidents caused by galloping had made several 500kV Extreme-High-Voltage lines shut down, partial discharge and disconnection fault. In light of climatic change process, structure of transmission lines, ice formation and arrangements of anti-galloping fittings, it was the average equations of galloping of Jinlin I, II, III Circuits, Sanjiang II Circuits and Nanjing I Lines that were obtained and detail analyzed in this paper, which was based on three freedom nonlinear dynamic equations that considered curve models and arrangements of anti-galloping fittings, and would reveal nonlinear dynamic properties, such as the conditions and processes of galloping’s occurrence and development. Aimed at improving the theoretical cognitive level of galloping, and proposing to improve the power grid's ability against icing galloping, following conclusions were gave: First, this accident happened in Hubei belonged to typical Nigol galloping; Second, reasonable arrangement of anti-galloping devices could effectively improve the conductors’ ability of anti-vibration; Finally, some suggestions based on theoretical computations were gave to make the arrangements of anti-galloping fittings more reasonable.

Key words： EHV UHV Overhead Transmission Line Galloping of Iced Overhead Transmission Line Nonlinear dynamics

Received: 08 December 2015 Published: 15 May 2017

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2017/V36/I10/93

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