A recent report from IEA explores how variable renewables can be integrated on a large-scale into the electricity system.
The report proposes to replace the term 'intermittency' with 'variability'. Calling renewables intermittent is misleading, since wind or solar power do not drop from full power to zero and vice versa - they are available at some level much of the time, and ramp up or down following gradients dictated by weather.Read full article
The Handbook of Power Quality available in online bookshops since April 2008, has now been complemented with a website providing the reader with case-studies for each chapter and extensive appendices listing current standards, relevant mathematical formulas, and electrical circuits’ principles.
To download case studies and appendices, please visit the publisher's website.
Read full article
IEEP and its partner, the Natural Resources Defense Council (NRDC) have published a report on “Climate Change and Sustainable Energy Policies in Europe and the United States”. This report includes the main conclusions of our joint project - Transatlantic Platform for Action on the Global Environment (T-PAGE). T-PAGE has provided a platform for debate to stimulate dialogue and exchange of experiences between environmental NGOs, academia and other interested civil society organisations in the U.S. and EU.Read full article
We are carrying out a major pan-European project to identify a number of issues relating to current levels of Power Quality. Our aim is twofold:Read full article
This paper introduces methods to quantify the impact of wind power and other types of distributed generation on the overvoltage risk. The so-called hosting capacity approach, introduced in the very first issue of this magazine, is used as the basic approach. Both a deterministic and a statistical approach are introduced. The deterministic approach is suitable for generation with a constant production most of the time. However, it is shown that a deterministic approach could easily result in an unnecessary barrier against the introduction of wind power. For any method used to determine the hosting capacity, a serious discussion is needed about overvoltage indices and objectives.
Read full article
The following article is the result of an interview with Jean Van Vyve and provides a brief overview of the significance of and prospects for nuclear energy in the energy sector. The article is published as an eBook so you can scroll the different pages using the titles below. The full article is also available as a PDF for download.Read full article
In the paper major laboratory equipment is described: photovoltaics, microturbine, fuel cell, battery energy storage, together with the configuration of the laboratory network facilitating studies of characteristics of those energy sources and problems of cooperation of distributed generators with electrical power network. For integration of distributed sources into the power system it is necessary to properly control their operation.Read full article
In the last decades there have been great advances in electronic, information and communication technologies. Up to date, any of these advances have been implemented in electrical systems, but some difficulties have been encountered, particularly regarding to the integration of intelligent electronic devices from different manufactures into a centralized system. With the aim of solving the above mentioned problem, the standard IEC 61850 was developed to specify communication networks in substations.Read full article
Characteristics of voltage sags caused by faults in distribution networks depend on the design of the protection system and the coordination between the different protective devices. The presence of distributed generation (DG) changes the radial nature of distribution systems, so it can affect the performance of the protection system, and consequently the characteristics of voltage sags. In addition, DG will help to maintain the during-fault voltages of healthy phases.Read full article