Browsing by Author "Ladewig, K."

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    A wideband distributed data acquisition system for high voltage applications
    (Stellenbosch : Stellenbosch University, 1999-12) Ladewig, K.; Vermeulen, H. J.; Bakkes, P. J.; Stellenbosch University. Faculty of Engineering. Dept. of Electrical & Electronic Engineering.
    ENGLISH ABSTRACT: This thesis describes a data acquisition system topology that has been optimised for measuring wide band signals in high voltage (HV) environments. A brief background is given on the various high voltage applications where a wide band acquisition system would be useful. A comparison is made between the developed system and the available commercial equipment that would otherwise be used for these applications. The topology of the acquisition system is of a distributed nature in the sense that a digiti sing probe will be implemented close to an HV transducer. The digitised data is then transmitted serially via a high-speed optical fibre link to an intelligent acquisition unit, which is also situated in the external substation environment. The acquisition unit accommodates up to two channels and is controlled via an RS-232 link from a host computer, which will typically be located in the substation. The data acquisition system was constructed and tested in a laboratory environment. A software control program was developed for controlling the acquisition hardware. A number of analog input signals were captured and downloaded to the host Pc. During this process, an analysis was made on the performance and the validity of the acquired data. The relatively low cost and versatility of the developed system make it suitable for a wide variety of applications in both industrial and research environments.