高速铁路牵引供电关键设备服役性态演变机理及系统健康诊断

Considering the problems of the high-speed railway(HSR) traction power supply system(TPSS) that the recession process and service behavior of key equipments is not clear, the system health status is made difficult to assess, and the speed of searching fault components and its reason is slow. The project is put forward to research about “the evolution mechanism of service behavior of key equipments and the diagnosis of system health status in high speed railway traction power supply system”. Through researching the evolution mechanism and influence factors of service behavior of the traction transformer, the catenary, the integrated grounding system, and combining with data inspection and monitoring, the corresponding evaluation index system and simulation platform are established. And then, the evolution law of service behavior of three key equipments can be revealed and assessed. Above this basis, by analyzing coupling relationship among all the equipments, assess the health status of traction power supply system and warn any possible fault in time. Through Revealing the propagation law of equipment different fault modes in system, study the fault inversion method and accurately search fault component and its reason. The project aims to reveal the evolution law of service behavior of the key equipments in high speed railway traction power supply system and accurately assess the health status of system to realize early fault warning, the state maintenance and fast fault identification. It is important to provide guarantee on the safe and reliable service of our country''s high-speed railway traction key equipments and ensure the safe operation of large-scale high speed railway.

针对高速铁路牵引供电关键设备服役性能与状态衰退过程不明确、系统健康状态难以评估、故障元件和原因查找速度慢等现实问题，项目提出开展“高速铁路牵引供电关键设备服役性态演变机理及系统健康诊断”的研究。通过对高速铁路牵引变压器、接触网、综合接地系统等关键设备的服役性态演变机理及影响因素研究，结合检测与监测数据，建立相应的评价指标体系和仿真模拟平台，揭示三大关键设备的服役性态演变规律，并进行服役性态评估。在此基础上，通过分析各设备间的耦合关系，评估牵引供电系统的健康状态，及时预警可能发生的故障；并揭示设备的不同故障模式在系统中的传播规律，研究故障反演方法，快速查找故障元件及故障原因。项目旨在揭示高铁牵引供电关键设备的服役性态演变规律，准确评估系统健康状态，实现早期故障预警、状态检修和故障快速识别，对保障我国高速铁路牵引供电关键设备安全可靠服役和高速铁路的大规模安全运行具有重要意义。

针对高速铁路牵引供电关键设备服役性能与状态衰退过程不明确、系统健康状态难以评估、故障元件和原因查找速度慢等现实问题，项目通过理论分析、仿真分析、现场数据分析相结合的研究思路，取得了如下研究进展和成果：（1）揭示了牵引供电部分关键设备服役性态演变及故障机理，包括：牵引变压器内部多物理场耦合关系及服役性态演变机理，牵引变电所-综合接地系统建模及服役性态演变机理，所建立的牵引变压器和综合接地系统退化失效模型准确地从内部、外部描述了这些设备在牵引负荷条件下的服役性能衰变及退化规律，为后续研究奠定了理论与数据基础；（2）给出了牵引供电系统及关键设备健康评估方法，包括：牵引供电关键设备及系统健康评估方法，牵引供电关键设备及系统可靠性评估与预测方法，牵引供电关键设备风险评估方法，从中、长时间尺度对牵引供电关键设备和牵引供电系统进行了统计学上的评估与分析，有助于运营维护人员直观地掌握牵引供电系统全寿命周期的健康状态与所处的可靠性和风险水平；（3）提出了牵引供电设备（元件）故障快速识别方法，包括：牵引供电系统故障元件快速识别、故障定位，从短时间尺度分析了牵引供电设备之间的故障诱发机理与影响后果，给出了故障后的快速识别与排除方法，能够帮助现场维护人员实现故障的及早发现与快速隔离；（4）开发了牵引供电系统故障预测与健康管理软件平台，有效收集并管理设备的各种实时状态数据、环境数据以及非实时记录数据，并依据大量数据实现牵引变电系统及其关键设备的故障预测、健康评估、可靠性及风险评估和维修决策等，为牵引变电系统的安全可靠、高效经济运营维护提供决策依据。