Data collected from
Scottish Power at the Main Substation Meter
Monthly Consumption from August 1996 to June 1997.
Month | Aug 96 | Sep 96 | Oct 96 | Nov 96 | Dec 96 |
Main Substation (kWhrs) | 2053000 | 1608000 | 2320000 | 2492000 | 2504000 |
Month | Jan 97 | Feb 97 | Mar 97 | Apr 97 | May 97 | Jun 97 |
Main Substation (kWhrs) | 2401000 | 2206000 | 2203000 | 2669000 | 2375000 | 1955000 |
Half-Hourly Readings from September to December 1997, with the following monthly consumption:
Month | Sep 97 | Oct 97 | Nov 97 | Dec 97 |
Main Substation (kWhrs) | 1948290 | 2354700 | 2345535 | 2199655 |
Data directly metered
at the John Street Substation Meter.
For the period of one week (12/03/97 to 19/03/97) the group obtained half-hourly readings
by installing a camera and a videorecorder.
Also, for this same week, the total consumption was metered for the Unicentre.
For the purpose of the John Street Island analysis, the data required were accurate daily and yearly profiles.
As such, by subtracting the metered weekly consumption for the Unicentre, we calculated the weekly consumption for the John Street Island.
This allowed to estimate the John Street Island Electricity Demand to be approximately 40% of the Total Main Substation Demand and therefore calculate the monthly consumption for the Island.
Month | Aug 96 | Sep 96 | Oct 96 | Nov 96 | Dec 96 |
Main Substation (kWhrs) | 821200 | 643200 | 928000 | 996800 | 1001600 |
Month | Jan 97 | Feb 97 | Mar 97 | Apr 97 | May 97 | Jun 97 |
Main Substation (kWhrs) | 960400 | 882400 | 881200 | 1067600 | 950000 | 782000 |
Month | Sep 97 | Oct 97 | Nov 97 | Dec 97 |
Main Substation (kWhrs) | 779316 | 941880 | 938214 | 879862 |
The Yearly Electricity Demand is plotted in the following bar chart:
The Daily Electricity Profiles generated from the One Week Half-Hourly Readings are:
Averaging all weekdays and likewise the two weekend days into separate profiles, the typical daily electricity profiles as shown below.
These daily profiles were used as our reference scenario in the feasibility study for the John Street Island.
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Copyright © 1998 Balacó Guerra Parkin Simms Sousa