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首页> 外文期刊>Emerging and Selected Topics in Power Electronics, IEEE Journal of >Fault Diagnosis and Fault-Tolerant Control of Megawatt Power Electronic Converter-Fed Large-Rated Asynchronous Hydrogenerator
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Fault Diagnosis and Fault-Tolerant Control of Megawatt Power Electronic Converter-Fed Large-Rated Asynchronous Hydrogenerator

机译：兆瓦级功率电子变换器供电的大型异步水轮发电机故障诊断与容错控制

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摘要

In recent years, it has been difficult to achieve power converter redundancy in the multichannel voltage-source inverter (VSI)-fed large-rated doubly fed induction machines (DFIMs), and it has not yet been adopted in any commissioned variable-speed pumped storage power plants. Multichannel VSIs are a fundamental part of DFIMs, and they control the real and reactive powers of the machines. This paper presents the fault-tolerant operation of a large-rated DFIM hydrogenerating unit at open-switch faults in back-to-back VSIs. A technique for diagnosing the open-switch faults in grid-side and machine-side converters is proposed. An open-switch fault is detected based on the variation in rotor currents and dc link voltage, which reduces the computational efforts during fault diagnosis. A 250-MW DFIM with five-channel three-level VSIs (each rated at 9 MVA) is simulated in the MATLAB/Simulink environment to observe the drive behavior. Finally, a 2.2-kW DFIM is tested in a laboratory environment to verify the experimental results.
机译：近年来，在多通道电压源逆变器（VSI）供电的大功率双馈感应电机（DFIM）中实现功率转换器冗余一直很困难，并且尚未在任何调试的变速泵中采用它。蓄能电站。多通道VSI是DFIM的基本组成部分，它们控制机器的有功功率和无功功率。本文介绍了大型DFIM加氢装置在背对背VSI中出现开路开关故障时的容错操作。提出了一种诊断电网侧和机器侧变流器开路故障的技术。根据转子电流和直流母线电压的变化来检测开路故障，从而减少了故障诊断过程中的计算量。在MATLAB / Simulink环境中模拟了具有五通道三级VSI（每个额定值为9 MVA）的250 MW DFIM，以观察驱动器行为。最后，在实验室环境中对2.2 kW DFIM进行了测试，以验证实验结果。

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