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ABSTRACT
The phasor measurement units (PMUs) are new age measurement devices that provide frequency measurements and time-aligned phasors (synchrophasors) of current and voltage at selected locations of the electric power grid. These devices are continuously evolving to cater for the growing need of smart grids. In general, the PMU failures are hidden which require appropriate modelling. As they are recent devices with sparse database of stochastic failures, the functional integration of different modules has aleatory and epistemic uncertainties. However, PMUs are descendants of digital recorders and thus reliability parameters of different functional modules are already known due to prior applications. Therefore, performing functional analysis with uncertainties enables us for detailed understanding of their functions and sub-functions. This paper embarks on functional uncertainty analysis using fuzzy hidden Markov model. The methodology provides with optimal path for hidden failures to mitigate propagation of uncertainty amongst the functional blocks.
DISCLOSURE STATEMENT
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Soumita Ghosh
Soumita Ghosh was born in India. She received her BE (EEE) degree from VTU, Belgaum, India and ME degree in power systems from the Birla Institute of Technology in Ranchi, India in 2012 and 2014, respectively. Currently, she is pursuing PhD degree in the Department of Electrical and Electronics Engineering, Birla Institute of Technology, Ranchi, India. Her research interests include power system reliability and PMU placement.
E-mail: [email protected]
Debomita Ghosh
Debomita Ghosh was born in India. She received her ME and PhD degrees from the Birla Institute of Technology in Ranchi, India. She is currently an assistant professor of electrical and electronics engineering at the Birla Institute of Technology in Ranchi, India.
E-mail: [email protected]
Dusmanta Kumar Mohanta
Dusmanta Kumar Mohanta was born in India. He received his BSc engineering (electrical) degree from the College of Engineering and Technology, Bhubaneswar, India and ME (power systems) degree from Birla Institute of Technology, Ranchi, India, and PhD (Engineering) degree from Jadavpur University, Kolkata, India. He is an IEEE senior member. He is currently a professor in the Department of Electrical and Electronics Engineering at Birla Institute of Technology, Ranchi, India. He was an electrical engineer in the Captive Power Plant of the National Aluminum Company (NALCO), Angul, India. He is an editor of “Electric Power Components and Systems” journal.
E-mail: [email protected]