By HDK / Published on Wed, 2009-09-09 08:26
The intelligent metering of energy and water consumption in local and regional public buildings and the half hourly analysis of consumption data can enable savings opportunities to be identified, including the detection of faults. From Leicester City Council’s experience with intelligent metering it has been found that in some buildings savings of up to 20-30 % can be obtained with little or no investment.
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By Walter Hulshorst / Published on Sun, 2009-02-01 10:39
Often windturbines in the range between 300 kVA up to 3000 kVA are connected to the MV grid by a distribution transformer. Very often it is easy to measure the electricity on the LV side of the transformer, which is connected to the windturbine. Since this is not the actual point of connection with the grid, it is needed to make an estimation of the energy losses due to the transformer.
As can seen from the figure above the measured electricity at the location of the meter equals to Ewind, while the actual delivered energy to the grid equals Edelivered. The difference between them are the losses caused by the transformer (strictly the cables should also be included). To calculate the electricity delivered it is necessary to make an estimation of the losses of the transformer.
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By Stephen Browning / Published on Wed, 2008-04-09 12:34
We now need to explore the requirements for the content of different types of messages used between the customer premises and the industry.
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