五跨关节等高点对接触网弓网性能的影响

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Abstract Research purposes: As the core part of overhead contact system, the design concept of the overlap plays a crucial role in the pantograph-catenary current collection. When designing the five span overlap of the overhead contact system, a certain height of the roof ridge is usually reserved at the transition point between the two supports to reduce the pressure on the pantograph and catenary, however, there is currently no clear requirement for the lifting amount of the contour point, and its size also affects the current collection performance of the pantograph and catenary.In severe cases, it may affect the safety of train operation. Therefore, studying the influence of the contour point position of the five span overlap joint on the lifting amount of the contact line and the contact pressure between the pantograph and the catenary is of great significance for improving the current collection quality of the catenary and ensuring the safety of high-speed railway operation. In this paper, theoretical analysis, the simulation of pantograph-catenary and other means are used to study the impact of the height of the five span overlap contour point of the overhead contact system with a speed of 350 km/h on the overall pantograph and catenary performance.
Research conclusions: (1)The lifting amount of contact wire, pantograph catenary contact force and standard deviation of contact force when the rear pantograph passes are far greater than the lifting amount of contact wire, pantograph catenary contact force and standard deviation of contact force when the front pantograph passes.(2)The maximum lift of the contact wire and the minimum contact force between the pantograph and the catenary generally occur near the contour points of the overlap. The main reason is that the two conductors at the contour point are lifted. Due to inertia, the contact line of the pantograph will be lifted significantly for a short time after passing through the roof ridge, and the contact force will be reduced instantaneously.(3)The elevation of the five span overlap of the high-speed railway overhead contact system with a speed of 350 km/h can be selected in the range of 30 mm to 60 mm, but the elevation of the contour point is between 30 mm and 40 mm when the current collection of the pantograph and catenary is optimal.(4)The research results of this paper are applicable to the professional field of electrified railway overhead contact system.

Key words： high-speed railway overhead contact system five span overlap contour point simulation of pantograph-catenary

Received: 11 October 2023

PACS:

U225.4

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	DENG Hong

Cite this article:

DENG Hong. The Influence of the Five Span Overlap Contour Point on the Performance of the Pantograph-catenary[J]. Journal of Railway Engineering Society, 2023, 40(12): 61-65.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2023/V40/I12/61

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