The wind energy conversion systems (WECS) require continuous and safer conditions during operations. In this context, the fault diagnosis of the electric generator and even the power converter are needed to improve the reliability and the availability of the WECS with low costs. This article proposes a new algorithm for real‐time open‐circuit fault diagnosis in power converter for a WECS based on permanent magnet synchronous generator (PMSG). So, an easy and fast approach for fault detection and isolation (FDI) is developed. The proposed fault diagnosis algorithm only uses real‐time measurements of the phase currents. Indeed this approach detects simple and multiple open‐circuit switch faults and ensures immunity to false alarms when the PMSG rotation speed changes. Experimental results are presented using a 1.57 kW four poles pairs three‐phases PMSG which is directly coupled to a servomotor to emulate the wind speed. These results show that the proposed FDI approach is able to detect, to identify and to isolate the open‐phase fault in power converter connected with PMSG.

中文翻译：

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在与永磁同步发电机-直流系统连接的基于IGBT的功率转换器中进行开路故障诊断方法的实验研究

风能转换系统（WECS）在运行过程中需要连续且安全的条件。在这种情况下，需要对发电机乃至功率转换器进行故障诊断，以低成本提高WECS的可靠性和可用性。本文提出了一种基于永磁同步发电机（PMSG）的WECS功率变换器中实时断路故障诊断的新算法。因此，开发了一种简便，快速的故障检测和隔离方法（FDI）。该建议的故障诊断算法只使用实时相电流的测量。确实，这种方法可以检测简单和多个开路开关故障，并确保在PMSG转速变化时不受误报的影响。使用1.57 kW的四极对三相PMSG给出了实验结果，该PMSG直接与伺服电机耦合以模拟风速。这些结果表明，所提出的FDI方法能够检测，识别和隔离与PMSG连接的功率转换器中的断相故障。