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Integral Sensor Fault Detection and Isolation for Railway Traction Drive

機(jī)譯：鐵路牽引傳動(dòng)系統(tǒng)集成傳感器故障檢測(cè)與隔離

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Due to the increasing importance of reliability and availability of electric traction drives in Railway applications, early detection of faults has become an important key for Railway traction drive manufacturers. Sensor faults are important sources of failures. Among the different fault diagnosis approaches, in this article an integral diagnosis strategy for sensors in traction drives is presented. Such strategy is composed of an observer-based approach for direct current (DC)-link voltage and catenary current sensors, a frequency analysis approach for motor current phase sensors and a hardware redundancy solution for speed sensors. None of them requires any hardware change requirement in the actual traction drive. All the fault detection and isolation approaches have been validated in a Hardware-in-the-loop platform comprising a Real Time Simulator and a commercial Traction Control Unit for a tram. In comparison to safety-critical systems in Aerospace applications, Railway applications do not need instantaneous detection, and the diagnosis is validated in a short time period for reliable decision. Combining the different approaches and existing hardware redundancy, an integral fault diagnosis solution is provided, to detect and isolate faults in all the sensors installed in the traction drive.
機(jī)譯：由于在鐵路應(yīng)用中電力牽引驅(qū)動(dòng)器的可靠性和可用性日益重要，因此，故障的早期檢測(cè)已成為鐵路牽引驅(qū)動(dòng)器制造商的重要關(guān)鍵。傳感器故障是故障的重要來源。在不同的故障診斷方法中，本文提出了一種用于牽引傳動(dòng)中傳感器的整體診斷策略。這種策略由用于直流（DC）鏈路電壓和懸鏈電流傳感器的基于觀察者的方法，用于電動(dòng)機(jī)電流相位傳感器的頻率分析方法以及用于速度傳感器的硬件冗余解決方案組成。它們都不要求在實(shí)際牽引驅(qū)動(dòng)器中進(jìn)行任何硬件更改要求。所有故障檢測(cè)和隔離方法均已在包含實(shí)時(shí)模擬器和商用電車牽引力控制單元的硬件在環(huán)平臺(tái)中得到驗(yàn)證。與航空航天應(yīng)用中的安全關(guān)鍵系統(tǒng)相比，鐵路應(yīng)用不需要即時(shí)檢測(cè)，并且診斷可以在短時(shí)間內(nèi)得到驗(yàn)證，從而可以做出可靠的決策。結(jié)合了不同的方法和現(xiàn)有的硬件冗余，提供了完整的故障診斷解決方案，以檢測(cè)和隔離牽引傳動(dòng)中安裝的所有傳感器中的故障。

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