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Title: Design and implementation of wireless data acquisition system for measurements in high voltage substations
Author: Wang, Yu
ISNI:       0000 0001 3562 3679
Awarding Body: University of Strathclyde
Current Institution: University of Strathclyde
Date of Award: 2005
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This thesis reports a R&D project of development and implementation of "Wireless Digital EMI measurement System". This system is developed to replace presently-used "Fibre Analogue EMI Measurement System'" and acquire the fast transient EMI signal in substations. This system is a typical "distributed field data acquisition system". The front-ends of this system are several "Remote Acquisition Units" (RAU). The background (or back-end) of this system is a PC. A point-to-multipoint wireless local area network is used to connect RAUs and PC. The RAU is placed in substations with a sensor together and controlled by a remote PC. The RAU performs 80MSPS sampling rate, has 512kB memory and trigger capability. It captures the fast transient EMI signal, stores the data in its memory and sends the data to remote PC. Because general purpose acquisition products (such as DSO) are not suitable for this application, the RAU had to be implemented through a board-level design, i. e. using compone nts and custom designed PCBs to build the RAU. In this board-level design, ADC, memory and a CPLD were employed to build the high-speed acquisition circuit, a micro-controller was applied for control and communication functions. The wireless communication network is a bi-directional network, which transmits the data from RAUs to PC and vice versa. This communication network is based on Bluetooth wireless modems. The PC is the background of this system, which provides a Man-Machine Interface to users. The application software is written in Assembly language. The "Wireless Digital EMI measurement system" has been fully tested in the laboratory and some measurements were made in a substation. The tests and measurements showed that the system can significantly increase the efficiency of EMI measurement in substations or of emissions from large systems. Furthermore the acquisition circuit in this system can be produced as an individu Protection is being sought in the latter case.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral