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New connections, new capacity and a new way of living
by Brian Dames, chief executive, Eskom
 One number in particular - 4,3-million - has great meaning to me because that's how many households Eskom has brought electricity access to since 1990. Yet it is precisely the scope of this success that has created new and complex challenges for our country, putting serious strain on our existing infrastructure... ( more) |
State of the system
Speech by Malusi Gigaba, minister of public enterprises, to parliament
 Giving his regular State of the System briefing to parliament recently, the minister of public enterprises Gigaba Malusi, said that these briefings have become increasingly important, given the challenges and delays the utility is experiencing with the new build programme... ( more) |
Cigré 7th southern African regional conference
by Mike Rycroft, features editor
 The 7th Cigré southern African regional conference was held at the Lord Charles hotel in Somerset West from 7 - 11 October 2013. The program consisted of a day of tutorials, a study group colloquium, two days of technical papers and a day of technical visits. An interview of Klaus Frölich, president of Cigré (pictured) is published here... (more) |
Online Proceedings of the 24th AMEU Technical Convention 2013
by Clare van Zwieten, managing editor, EE Publishers
The print edition of the 2013 AMEU Technical Convention, hosted by Buffalo City (East London) from 6 - 9 October 2013, has been mailed to readers with the November 2013 issie of Energize magazine. The online edition of the AMEU Proceedings 2013 is available here |
Installation issues should not impede the deployment of solar PV systems
by Nathan Venter, Schletter
Roof-mounted solar photovoltaic (PV) panels can change the power dynamic of SA by supplying efficient, green energy. However, many may now be reasonably wary of installing them following Carte Blanche's exposé of the poor installations of rooftop solar geysers that resulted in unserviceable "solutions"... (more) |
The Jacob Marley column: Chains of folly
When one has been dragging chains made of one's own folly around for over 170 years, one is alert to that happening to others in spite of the availability of the most sophisticated tools for forecasting, planning and control. The myriad pitfalls along the way are often of our own making... (more) |
Energize Inbox
This month's winning letter
This month's winning letter proposes a reason for the poor reports in NERSA's audit of municipal electrical infrastructure, while another letter uses the illustration of an old inefficient motor car to show how electrical energy is wasted in everyday activities... ( more) |
Embedded generation and its effect on the utility's bottom line
by Wilfred Fritz, Cape Peninsula University of Technology
The author poses the question of whether small scale renewable distributed generation systems are feasible with feed in tariffs or net metering in South Africa... ( more) |
Protection against loss of excitation in generators
by ZP Shi, JP Wang, Z Gajic, C Sao, ABB, and M Ghandhari, Royal Institute of Technology, Sweden
When a generator loses its excitation, the rotor current decreases gradually and the field voltage slowly decays as dictated by the field time constant. As a final outcome, the generator starts to consume reactive power from the power system instead of supplying it... ( more) |
VSC HVDC best suited for power transmission in Africa
by Dale Pudney, HVT Power Systems, and Luo Wei, NR Electric
Voltage source converter (VSC) HVDC is one of the technologies that is well suited to strengthening African transmission networks and to act as an enabler for economic development... (more) |
Efficiency of an AC transmission line converted into a DC system
by Mushagala Matabaro and Gary Atkinson-Hope, Cape Peninsula University of Technology
This research investigates how energy could be transported with minimum losses when an existing HVAC transmission line is converted into a HVDC transmission system... (more) |
Moisture measurements in power transformers
by Tom Dalton, Martec
Moisture in mineral oil cooled and insulated power transformers has detrimental effects. Doubling the moisture content in a transformer could have the effect of halving the life expectancy of the unit, dramatically reducing the expected return on investment... (more)
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Hybridising renewable energy systems
by Mike Rycroft, features editor
The intermittent nature of many renewable energy (RE) systems makes them unsuitable for use as a sole source of supply, but bringing different RE technologies together or combining them with more conventional forms of generation could offer better overall performance... (more) |
Lightning and surge protection for solar power plants
Information from Surgetek
The design of a solar power plant should include lightning protection in accordance with the IEC 62305-2 standard... (more)
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Power station restoration reduces load on SA power pool
Information from EBHE Energy
Namibia, like its fellow Southern African power pool members is currently facing an electricity shortage. Namibian generation capacity is only around 380 MW with a demand of over 450 MW... (more) |
3D technology simplifies substation design
Information from Aurecon
Working smarter rather than harder is key. Nowhere is this better illustrated than in the use of 3D design technology for electrical substations, says Barry Grib, project manager at Aurecon... (more) |
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