2 research outputs found
Wavelet Transform-Spectral Kurtosis Based Hybrid Technique for Disturbance Detection in a Microgrid
This paper proposes a combined Wavelet Transform-Spectral Kurtosis based approach for detecting islanding and power quality (PQ) issues in microgrids. Islanding and PQ disturbances are generated in a microgrid comprising renewable energy sources such as wind and solar photovoltaic apart from diesel generators, fuel cells and flywheel/battery energy storage systems (FESS/BESS). Different microgrid configurations are considered to test the detection capabilities of the proposed approach. The negative sequence component of the voltage signal is measured at the point of common coupling (PCC) and processed through Short Time Fourier Transform (STFT), Wavelet Transform (WT) and Wavelet Transform-Spectral Kurtosis (SK) under no-noise and 20-dB noise conditions. Furthermore, performance indices such as energy and kurtosis are calculated in all case studies to detect disturbances based on a suitably selected threshold. The results of the case studies demonstrate the superior performance and robustness of SK when compared with STFT and WT for detecting islanding and PQ disturbances in MGs
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ElChemo: A cross-domain interoperability between chemical and electrical systems in a plant
The paper proposes a novel framework capable of establishing machine-to-machine (M2M) interactions between chemical and electrical systems in the industry. The framework termed as ElChemo addresses the challenges in M2M interaction of entities from different silos, such as differences in the domains' behaviour, the heterogeneities arising from different vocabularies and software. The OntoTwin ontology has been developed based on OntoPowSys and OntoEIP ontologies, which are parts of an intelligent platform called the “J-Park Simulator(JPS)”. The ElChemo framework uses Description Logic (DL) and SPIN reasoning techniques to establish the interaction between the chemical and electrical systems in a plant. This paper presents a depropaniser section of a chemical plant and its corresponding electrical system as a use case scenario to demonstrate the interoperability between the two silos within the ElChemo framework. The results from the use case demonstrate, as a proof of concept, the potential of the proposed framework and can be considered as the fi rst step towards the development of a knowledge graph based framework capable of increasing interoperability between cross-domain interactions