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Geographical load shift and its effect on interchange evaluation

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2 Author(s)
Winston, W.E. ; Alabama Power Co., Birmingham, AL, USA ; Gibson, C.A.

An attempt is made to evaluate the amount of load shift that actually occurs on a large utility and to assess the error in the economic dispatch due to using B-constants developed neglecting the geographical load shift. This is done by a load shift simulation model to introduce load shifts in the development of B-constants. The B-constants are then used in a production costing/interchange evaluation program to investigate the effect of using B-constants developed with and without the load shift on evaluations of the worth, percent power delivered, overall system power losses, and production costs. A geographical load shift in excess of 10% over 24 h period has been shown to exist on a large electric utility. The production cost was found to be relatively insensitive to the use of the nominal B-constants. The errors in percent power delivered resulting for the use of nominal B-constants are similar to the errors in the worth.<>

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Power Systems, IEEE Transactions on  (Volume:3 ,  Issue: 3 )