Electricity from wastewater treatment

  Recent developments have shown that it is possible to generate sufficient energy from organic material contained in a variety of wastewater streams to provide a significant portion of the energy required to run the plant. It is however, an energy intensive operation. Download the PDF document

Smart grid: Global impact report overview

by Mike Rycroft, features editor Experts have discussed theoretical smart grid models for over a decade, but until now there has been no way to  benchmark results globally. Ventyx and ABB selected VaasaETT to develop a smart grid global impact report, a global report into smart grids and their outcomes. This article summarises the report. […]

How smart can the grid really be?

by Dale Pudney, HVT Power Systems and Luo Wei, NR Electric With the improvement of electronic communications and computing technology, it becomes possible to integrate and improve the capabilities of the protection and automation systems on our power grids. Download the PDF document

Solar-aided power generation compared to stand-alone CSP

  A recent academic study compared solar aided power generation (SAPG) solutions with that of a similar-sized stand-alone concentrating solar power (CSP) plant in the South African context. The objective was to determine the real advantages of these technologies. Download the PDF document

Back to the beginning through smart grid

by EK Onwunta and MTE Kahn, Cape Peninsula University of Technology In the beginning generation was local  and supplied local demand. That changed because of technological advancements with improved efficiency and economies of scale. Modern society is highly dependent on the availability of cheap and reliable electricity. A revival of interest in distributed generation implies […]

Nuclear power: Glass half full or half empty?

  Half empty in the West, and half full in a handful of centrally planned economies, nuclear power’s prospects appear to be doomed in markets where private investors tend to make the decisions and assume the risks; while in other parts of the world, where central governments make the calls and the public’s approval is […]

Investigation of short-circuit analysis conducted at Kromco

  This article presents a short-circuit analysis conducted for the Kromco electrical power system using power system modelling, analysis and simulation software called “DIgSilent PowerFactory”. The main focus is determining the maximum short-circuit currents and fault levels at various locations on the network, and verifying the adequacy of power system components, to see if they […]

Power generation options for South Africa

  by Mike Rycroft, features editor South Africa has a history of relying on large centralised power plants owned and run by a state-owned utility for electricity generation. This approach has proved to be costly and unresponsive to demand. Current thinking, and developments in technology, favours smaller distributed generation plants which could be built more […]

Biomass fired power plants for distributed power generation

Rural areas of developing economies which are not served by the grid require alternate means of electric power generation. A system based on a Stirling engine could be an attractive option for distributed power generation in such conditions. Download the PDF

Ride-through testing of wind turbine converters

  The testing of low-voltage, ride-through capability of wind turbine converters has recently been standardised in the 2nd edition of IEC 61400-21. Thus, testing the converters in the factory is important to shorten the on-site testing time required to meet  IEC 61400-21 requirements. Download the PDF document