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This paper introduces fault diagnosis and separation, mitigation, and modeling of a proton exchange membrane fuel cell (PEMFC). Experimental tests of a single PEMFC were performed during this study. Flooding and drying faults were implemented to be detected from the cell voltage and impedance response of the cell. The impedance response at low frequency was used to identify the cause of the fault...
In this paper, we have introduced a new technique based on simultaneous analysis of output voltage gain vs. frequency and phase vs. frequency for fault testing of analog integrated circuits. An automated test frequency generation method is demonstrated here to select minimum number of test frequencies as stimuli. The introduced technique is applied to three benchmark circuits and the obtained results...
The distribution grid is mainly built on a radial configuration where power is coming from one transformer substation to supply clients. Up to recently, in the rare cases where distributed generation existed, it was almost exclusively constituted of rotating machines, which have quite a different behaviour under fault than inverter-based sources. Consequently, current connection impact assessments...
Rapid increase of the transmission capacity and environmental limit of the power transmission passage have indispensably promoted development of the AC/DC hybrid transmission lines on the same tower, especially for UHV systems being established in China. Unfortunately, severe electromagnetic coupling effects will inevitably exist between the UHV AC and DC transmission lines built on the same tower...
In this paper a BISR architecture for embedded memories is presented. The proposed scheme utilises a multiple bank cache-like memory for repairs. Statistical analysis is used for minimisation of the total resources required to achieve a very high fault coverage. Simulation results show that the proposed BISR scheme is characterised by high efficiency and low area overhead, even for high defect densities...
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