电气化铁路变电所地面自动过分相装置

交流电气化铁路每隔50~60km即设置一处牵引变电所,为解决现有车载断电过分相和地面切换过分相方式通过此处分相区时存在的各种问题,文章提出了一种基于大功率电力电子技术的变电所地面自动过分相装置设计方案,介绍了系统构成和主要部件的功能,探讨了正向行车和反向行车的控制方案和工作时序,并对晶闸管阀的安全设计以及在不同接线型式牵引变压器条件下的额定电压设计和切换死区时间进行了分析。通过现场高压运行试验,验证了系统设计及控制策略的可行性和安全性。装置能够根据系统情况进行参数自整定,适应性强,保障电力机车不降速、平滑无感知地通过变电所分相区,增加线路运输能力。

One traction substation is set in the AC electrified railway every 50 to 60 km. In order to solve the problems existing in the present on-board and ground passing neutral-section modes, this paper proposes a kind of design scheme of ground automatic neutral-section passing device based on high-power power electronic technique, introduces the system composition and functions of its main components, discusses the control scheme and time sequence of the forward and reverse driving, analyses the safety design, and explores the rated voltage of thyristor valve group and switching dead time under the condition of traction transformers with different wiring types. The feasibility and safety of the system design and control strategy have been verified by on-site high-voltage operation test. The device can self-tune the parameters according to the system conditions and has strong adaptability, ensuring that the electric locomotive smoothly passes neutral-section of the substation without speed loss, and increases the line transportation capacity.