Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009 / The industrial and population growth of a nation can cause power delivery problems to
localized areas of a national grid through their increased demand for electrical energy. One
reason for these power shortages is the insufficient current carrying capacity of existing high
voltage alternating current, (HVAC), transmission lines supplying the area. High voltage
direct current (HVDC) transmission lines are a possible solution as they provide better power
delivery than HVAC lines.
New or upgraded HVAC lines, or HVDC lines or combinations of HVAC and HVDC lines are
possible solutions to improve power delivery. This research investigates the various line
possibilities using theory. and cutting edge frequency and time domain software tools. The
challenge is how to approach this problem. What methodology or structure should be used?
Thus one of the contributions of this work is the development of a strategy (flow chart), for
solving power delivery problems to localized areas of a national grid through individual or
combinations (e.g. parallel operation) of HVAC and/or HVDC transmission lines. The main
contribution is the evaluation of a HVDC system as a solution to overcoming power delivery
shortages to a localized area of a national grid.
Three different software packages (two industrial and one academic) namely,
PSCAD/EMTDC (time domain), DlgSILENT PowerFactory (frequency domain) and MathCAD
software are evaluated for their capability to perform the simulation studies necessary to
prove the possible solutions given in the developed flow chart. The PSCAD/EMTDC software
package is evaluated for integrated HVAC/HVDC load flow analyses, DlgSILENT for
individual and parallel combinations of HVAC lines and MathCAD to prove hand calculations
to software results.
Five case studies are conducted. The first case study demonstrates a healthy system with no
delivery shortcomings, the second case study portrays the delivery shortcoming due to
increased localized area demand, and the remaining three case studies explore possible
solutions to solve the problem. The first possible solution is to construct an identical HVAC
line in parallel to the existing line.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:cput/oai:localhost:20.500.11838/1102 |
| Date | January 2009 |
| Creators | Smith, Johan |
| Publisher | Cape Peninsula University of Technology |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | http://creativecommons.org/licenses/by-nc-sa/3.0/za/ |
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