电气化铁路接触悬挂吊弦和电连接的电气负荷计算

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摘要研究目的:弦和电连接是电气化铁路接触悬挂的重要组成部分，其电气负荷是接触网安全运行的基本保证。目前世界上电气化铁路主要采用载流型铜合金绞线整体吊弦和软铜绞线电连接。本文从藕合平行导线电路计算原理出发，结合工程实际对接触悬挂吊弦和电连接的电气负载能力进行了仿真计算，得出吊弦和电连接的电气负载能力需求，意在提出接触悬挂电连接的设置原则。

研究结论:(1)载流型整体吊弦具有显著的多点并联分流作用，仅在变流点附近的3-5个吊弦和1个电连接明显参与了接触悬挂的电流分配，其余吊弦和电连接几乎不参与，电流趋近于零;(2)由于吊弦的载流能力十分有限，在持续变流点处的吊弦不能满足持续载流要求，应设置电连接;(3)电连接设置的具体原则为: 在供电线上网、绝缘锚段关节和非绝缘锚段关节、满足电流径路需要的不同股道接触网之间等处应设置电连接，而其余部分无需设置电连接;该设置原则适用于所有类型的电气化铁路接触网。

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	陈学光

关键词 ：接触悬挂, 吊弦, 电连接, 电流分配

Abstract：Research purposes:Both the dropper and the electrical connector are important components of the OCS(overhead contact suspension ) of electrical railway，which electrical load are crucial to OCS safe. The integral droppers with current carrying capacity made of copper alloy strands and the electrical connector made of soft copper wires were used widely in the world. In this paper the electrical load characteristics of the dropper and the electrical connector were discussed and analyzed based on the circuit theory of parallel transmission lines with mutual inductance，the current carrying demands are obtained and the practical setting principles of the electrical connector are proposed.

Research conclusions:(1)The integral dropper with current carrying capacity should have the significant function distributing current with parallel many points，only the three-five droppers and one electrical connector near the current change point could take part in the current distribution of OCS，and the other droppers and the electrical connectors should hardly take part in the current distribution which currents should approach zero.(2)Because the cross section of the dropper is limited，the dropper at the continuous current change point cannot undertake the current flowing, where the electrical connector must be set.(3)The electrical connectors should be set as a practical setting principles at the connection joints among the power supply lines and OCS，insulated overlaps，non-insulated overlaps， the connection joints among OCSs of differential rail tracks, and the electrical connectors need not be set at the other parts of OCS. The principles should be applied to all types of the OCS in electric railways.

Key words： overhead contact suspension dropper electrical connector current distribution

收稿日期: 2014-01-25

PACS:

U221

作者简介: 陈学光，1958年出生，男，高级工程师

引用本文:

陈学光. 电气化铁路接触悬挂吊弦和电连接的电气负荷计算[J]. 铁道工程学报, 2014, 31(5): 85-89.
CHEN Xue-guang. Load Calculation of Dropper and Electrical Connector in Overhead Contact Suspension of Electrical Railway. 铁道工程学报, 2014, 31(5): 85-89.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2014/V31/I5/85

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