By Fernando Nuno / Published on Fri, 2009-11-27 15:06
This webinar will provide a general view of drivers and barriers for CSP development, with a particular focus on the structure of the CSP Value Chain. From a technical point of view, the main key performances will be reviewed for the different technologies.
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By Isabelle Heriakian / Published on Thu, 2009-11-26 15:08
Written by Yurij Varetsky (Lviv Polytechnic National University, Lviv, Ukraine) and Zbigniew Hanzelka (AGH—University of Science and Technology, Krakow Poland).
The objective of this paper is to present performance peculiarities of industrial power systems using single-tuned filters for limiting harmonics and improving reactive compensation.
An industrial plant with existing harmonic problems was selected for investigation.
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By Isabelle Heriakian / Published on Wed, 2009-11-25 15:24
Written by David Chapman (CDA UK) and Roman Targosz (ECI), the briefing paper "collecting economic data in power quality survey" is available only to registered members of the power quality economics community of practice.
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By Isabelle Heriakian / Published on Mon, 2009-11-23 16:06
by Dr S. Hardie and Assoc. Prof. Neville Watson
The high returns to dairy farmers has resulted in many sheep and crop farmers converting to dairy farming. In order to maintain adequate grass growth for the cows, a large existing and increasing density of farm irrigation deep well pumps are extensively used during the summer. High levels of harmonic voltages and Total Harmonic Distortion (THD) are being experienced due to this equipment, and in some cases, is having adverse consequences.
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By Isabelle Heriakian / Published on Mon, 2009-11-23 15:48
by V.J. Gosbell.
There will be an increased need to deal with disturbing loads and uncertainties due to distributed generator connections in future networks. This paper in particular reviews AS/NZS 61000.3.6 and its application to distribution systems to see if the harmonic limits can be increased and if the stage 2 allocation procedure can be improved. It is shown that the major harmonic impact on equipment is related to Weighted Total Harmonic Distortion (WTHD).
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By Isabelle Heriakian / Published on Mon, 2009-11-23 14:57
by Prof. Dr. Carlo Alberto Nucci
This paper provides a key-note summary of developments in the management of power quality, with a focus on recent and future outputs in Cigré Study Committee C4. Aspects addressed are:
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By Isabelle Heriakian / Published on Mon, 2009-11-23 14:11
Power quality in future electrical networks.
This conference, unique in the Oceania region, was a premiere hosted by the EPE Centre.
The presentations were focused on defining the challenges facing the power quality of future energy systems.
Below, you will find the papers and presentations of the conference, and you can also refer to the comprehensive report of the workshop.
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By HDK / Published on Fri, 2009-11-20 20:49
Underground cables (UGCs) are – at installation – more expensive than overhead lines (OHLs), although it is very difficult to draw general cost ratios, due to the specificity of every project. In most cases comparisons are made solely on the capital costs of the equipment together with the costs of installation and accommodation works. In other cases, respective life costs are considered that take into account transmission losses, maintenance costs, availability (and associated outage related costs) and decommissioning.
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By HDK / Published on Fri, 2009-11-20 20:35
For economic reasons, extra high voltage (“EHV”) underground cables (“UGCs”) are rarely appropriate for an entire new AC power transmission project (although in some long distance circumstances a DC cable may be a solution). UGCs are, however, especially effective at helping power transmission projects to cross areas where there are environmental sensitivities. These include areas that are:
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By HDK / Published on Fri, 2009-11-20 20:30
Europacable is the European Confederation of Associations of Manufacturers of Insulated Wires and Cables. Europacable, and its member companies in the European cable industry, have spent 30 years investing in innovative technology for underground cabling that overcomes the limitations of overhead lines in certain circumstances, and today, cable manufacturers are able to provide innovative and customised solutions for the modern power transmission industry.
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By HDK / Published on Fri, 2009-11-20 20:27
As part of the European Union’s energy strategy, there is a commitment to reducing the social and environmental risks associated with the transmission of energy and in this respect cables can provide benefits as they have been shown to be more effective in mitigating potential health impacts.
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By HDK / Published on Fri, 2009-11-20 20:24
The size of the transition/sealing end compound would depend to some extent on the number of cables, but if two circuits of three cables are used, the analogy is more like a “tennis court”; if four cables are used the analogy is more like a “football field”. If the transition compound is placed in a woodland area, it can be easily camouflaged from view. In Denmark, for example, the compounds had to be camouflaged through tree and shrub planting.
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By HDK / Published on Fri, 2009-11-20 20:22
In principle, the equivalent conductor size of underground cables is much larger than that of the OHL (i.e. a copper cable of 2500 mm2 corresponds with an aluminium overhead conductor of 1500 mm2). Consequently, the electricity joule losses are lower. At high circuit loads, OHL losses can be up to three times the cable losses due to the smaller conductor size of OHL. Conversely, UGC losses would be slightly higher for low load currents.
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By HDK / Published on Fri, 2009-11-20 20:19
Once installed in the ground, cables are intrinsically maintenance free. Since their introduction, EHV XLPE cables have had an excellent track record. It is only external influences that could damage the cable, and remote monitoring of the cable circuit allows the rapid location of the fault, so that a targeted intervention can be conducted. Remote monitoring of the cable circuit also means there is no specific need for a permanently staffed route surveillance team.
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