Galloping of conductor is a major hazard to safe operation of transmission lines. This paper introduces the basic galloping stability mechanism of conductor, design method of anti-galloping and the application of anti...Galloping of conductor is a major hazard to safe operation of transmission lines. This paper introduces the basic galloping stability mechanism of conductor, design method of anti-galloping and the application of anti-galloping double pendulum and integral eccentric pendulum in China. Galloping stability mechanism of conductor was established based on vertical galloping mechanism developed by Den Hartog and torsional galloping mechanism developed by O. Nigel. A design method of anti-galloping was derived and anti-galloping double pendulum and integral eccentric pendulum were developed. Applications to several transmission lines including a 500 kV transmission line of large span indicated that they have played important roles in anti-galloping.展开更多
Based on several typical severe ice accidents that occurred in China, this paper summarizes and analyzes the characteristics and causes for severe ice accidents. The results show that the ice accidents occurring in Ch...Based on several typical severe ice accidents that occurred in China, this paper summarizes and analyzes the characteristics and causes for severe ice accidents. The results show that the ice accidents occurring in China have such characteristics as long duration, high frequency of occurrences, large coverage area and enormous loss to the national economy, etc. Drastic deterioration of mechanical property and electric property resulting from severe icing is the major cause of ice accidents. Besides, this paper summarizes the preventive measures for transmission lines in case of severe ice accidents.展开更多
文摘Galloping of conductor is a major hazard to safe operation of transmission lines. This paper introduces the basic galloping stability mechanism of conductor, design method of anti-galloping and the application of anti-galloping double pendulum and integral eccentric pendulum in China. Galloping stability mechanism of conductor was established based on vertical galloping mechanism developed by Den Hartog and torsional galloping mechanism developed by O. Nigel. A design method of anti-galloping was derived and anti-galloping double pendulum and integral eccentric pendulum were developed. Applications to several transmission lines including a 500 kV transmission line of large span indicated that they have played important roles in anti-galloping.
文摘Based on several typical severe ice accidents that occurred in China, this paper summarizes and analyzes the characteristics and causes for severe ice accidents. The results show that the ice accidents occurring in China have such characteristics as long duration, high frequency of occurrences, large coverage area and enormous loss to the national economy, etc. Drastic deterioration of mechanical property and electric property resulting from severe icing is the major cause of ice accidents. Besides, this paper summarizes the preventive measures for transmission lines in case of severe ice accidents.
