This Application Note discusses the causes and effects of voltage dips. Some dips are caused within the installation by, for example, starting of heavy motors or other loads, and these are usually easy to identify and resolve. Most dips originate in the supply network as the result of faults and these can neither be predicted nor controlled by the user. The causes and characteristics of network dips are discussed.Read full article
RETScreen International is a unique decision support tool developed with the contribution of numerous experts from government, industry, and academia. Over the coming months, Leonardo ENERGY will be publishing a series of webcasts on energy project analysis using RETScreen.
RETScreen 4: Overview and IntroductionRead full article
But use of Kyoto mechanisms and carbon sinks required
There has been a lot of buzz in recent years about the EU-2020 emission reduction targets. So much in fact, that we might quite easily forget that the first Kyoto goal set by the European Union has still not been achieved - the final date for that goal is 2012. This goal was established for the EU-15 and not for the EU-27 as are the 2020 targets. It prescribes an average annual emission level of -8% compared to the base year for the period from 2008 to 2012.Read full article
Ali Kazemi, Schweitzer Engineering Laboratories, Inc.Read full article
Casper Labuschagne, Schweitzer Engineering Laboratories, Inc.
A.F. Picanço, C de Salles, M.L.B. Martinez, P.C. Rosa, H.R.P.M. de OliveiraRead full article
A voltage dip is a Power-Quality phenomenon, often caused by short circuits in the electricity grid, in which the supplying voltage decreases during a short period of time (typically <2s). Some process components, such as variable speed drives and computers, are extremely sensitive to such dips, which may result in a complete process outage.Read full article
A new training package on “Sustainable Energy Regulation and Policymaking for Africa” is now freely available via the REEEP website. Developed by UNIDO with contributions from a number of organisations, and co-funded by REEEP, it provides an introduction to the key issues relating to the energy market and energy regulation as they affect sustainable energy.Read full article
Several European countries have a policy to encourage the development of renewable en-ergy sources. This is identified in e.g. the European green paper Energy strategy for a sus-tainable, competitive and secure energy supply (March 2006). In the transition towards a European sustainable energy system for the future and to reduce the dependency of im-ported primary energy sources such as oil and gas, the development of offshore wind power is an essential element.Read full article
In this guide, you will learn how to determine the maximum and minimum compensator power in order to compensate reactive power in case of harmonic pollution.
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