A New Approach for Current Sensor Fault Diagnosis in PMSG Drives for Wind Energy Conversion Systems
A New Approach for Current Sensor Fault Diagnosis in PMSG Drives for Wind Energy Conversion Systems
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DOI：
10.1109/tia.2013.2271992
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发表时间：
2014-03-01
影响因子：
4.4
通讯作者：
Marques Cardoso, Antonio J.
中科院分区：
文献类型：
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作者：
Freire, Nuno M. A.;Estima, Jorge O.;Marques Cardoso, Antonio J.
故障诊断是容错系统中的一个必不可少的功能，因为它为故障隔离和系统重构提供了必要的信息。近年来，永磁同步发电机（PMSG）驱动器由于其可靠性和可用性而在风能转换系统（WECS）中获得了突出地位。本文提出了一种新的方法，电流传感器故障诊断永磁同步发电机驱动器的WECS。传统的基于状态观测器的电流传感器故障诊断方法需要系统模型和相应的参数，与之相反，所提出的诊断方法仅使用测量的相电流。因此，它的主要优点是简单和可靠的诊断，使其适合于实时实施和触发补救程序。此外，可以区分电流传感器和开路故障，并且在两种情况下有效地识别受影响的相。建议的诊断技术被施加到两个功率转换器的常规背靠背拓扑结构，其性能分析的几个实验结果。
Fault diagnosis is a mandatory feature in fault-tolerant systems, since it provides the information necessary for the fault isolation and system reconfiguration. Recently, permanent-magnet synchronous generator (PMSG) drives have achieved prominence in wind energy conversion systems (WECSs), due to their reliability and availability. In this paper, a new approach is proposed for current sensor fault diagnosis in PMSG drives for WECSs. As opposed to the conventional state-observer-based methods for current sensor faults, which require a system model and the respective parameters, the proposed diagnostic method uses the measured phase currents only. Thus, its main merits are simplicity and reliability in the diagnosis, making it suitable for real-time implementation and to trigger remedial procedures. In addition, current sensor and open-circuit faults can be distinguished, and the affected phase is effectively identified in both cases. The proposed diagnostic technique is applied to the two power converters of a conventional back-to-back topology, and its performance is analyzed by means of several experimental results.