Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567811
Title: Design and implementation of automatic wireless high-speed data acquisition system for EMI measurements in power substations
Author: Liu, Karl Yanchao
Awarding Body: University of Strathclyde
Current Institution: University of Strathclyde
Date of Award: 2009
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Abstract:
In power substations. electric and magnetic emissions are generated during all operational conditions. In particular, switching operations of primary plant components such as disconnect switches and circuit breakers generate significant electromagnetic fields, which constitute potential electromagnetic interference (EMI) to sensitive electronic equipments within the substations. This thesis describes the design and implementation of a wireless automatic high -speed data acquisition system for EMI measurements in power substations. The system presented adopts a novel network concept to implement effective measurements. Instead of consisting of just one or several stand alone measurement devices used in conventional measurement setup, the system is designed as an interactive multi-node network, in which thousands of measurement devices could be distributed and managed through flexible wireless networking protocol. The nodes at different locations could cooperate to simultaneously measure the electromagnetic interferences so that the data from them could be correlated in time domain. This system is more like a wireless distributed network with high data acquisition capability compared to a static amplitude-only measurement system. The nodes in the measurement network could measure the transient signals both in time domain and in frequency domain. Two different implementations of frequency domain measurement are investigated. One is using short-time Fourier transform to conduct real-time spectrum measurement. The other is using trigger mechanism to synchronously measure transient signal's spectrum. In addition, the measurement networks could be controlled and monitored through Internet. The measurement data would be automatically sent to a database for collective processing. In a word, the system presented provides a versatile and powerful tool to characterize the transient phenomena in power substations.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.567811  DOI: Not available
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