A project report submitted to the Faculty of Engineering, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Science in Engineering. Johannesburg 1995. / Advances in digital computing technology make it possible to improve the design
of the Man Machine Interface (MMI), SCADA and ALARM modules used in
electrical utility control centres. to overcome the problem of control staff data
overloading. A possible solution is proposed, based on-an explicit representation
of a disturbed power system state in addition to quiescent conditions.
The structure of modem SCADA, installations is analysed in terms of the
computing power of full graphic workstations, the quantities of element data
delivered to the control room and the capabilities of intelligent remote terminal
units. This analysis indicates that existing designs for the presentation of SCADA
data need to change to solve the data overloading-problem.
The proposed philosophy moves the focus of attention from the element level up
to the device level by grouping and dividing all elements into categories at the
RTU and linking them to their parent device, Control staff are notified graphically
on the one-line displays, next to the device in question, of the existence of
abnormal elements by category. The element state details for the device are only
displayed on demand, resulting in a 95% reduction of alarm text messages.
Suggestions are made as to the software functions needed at tbe RTU and the
workstation to assist with the display of system data. Lastly racommendations are
offered to reduce maintenance by standardising and pre-ordering device element
data. / AC2017
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/22079 |
| Date | January 1995 |
| Creators | Candy, Richard Brodrick Charles |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | Online resource ([106] leaves), application/pdf |
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