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Fault detection and fault accommodation as well as fault tolerance are important issues in closed-loop controlled three-phase converters. For such systems, power semiconductors and sensors are the most affected components by the occurrence of failures. Therefore, fault diagnosis and remedial operating strategies involving such components are highly required. In this work we propose a new reliable...
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 (WECS), due to their reliability and availability. Therefore, in this paper a new approach is proposed for current sensor...
Among the multilevel converter topologies the cascaded H-bridge converter (MCHBC) differs from other topologies by having series connections of several power cells, producing a better voltage quality and higher voltage output range, and using the same voltage power supply levels. This characteristic adds several benefits as it allows a modular system, the use of low voltage power supplies, and output...
In order to compensate the worldwide energy consumption that is still rising, the wind energy is becoming more and more important. For this reason, the analysis of wind energy conversion systems, in which the occurrence of faults has a high negative impact, becomes a very important issue. Considering this, the aim of this paper is to present some diagnostic methods for open-circuit faults in the two...
Practically all the diagnostic methods for open-circuit faults in voltage source inverters (VSI) developed during the last decades, are focused on the occurrence of single faults and do not have the capability to handle and identify multiple failures. This paper presents a new method for real-time diagnostics of multiple open-circuit faults in voltage source inverters feeding ac machines. In contrast...
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