Max Demand Calculation for a Feeder

[TusharB]

If One utility company have details of Consumption (KWH) per Distribution Transformers (11/0.433KV) per month. How to calculate the Max Demand on that 11KV feeder, using this Consumption KWH information? Is there any formula suggested by IEEE Standards for the same, Please advise,

 

[waross]

The demand on a feeder depends on the demand profiles of the various customers. There may be a wide variation in the average to max current for different consumers.
The demand will be based on KVA rather than kW.
There may not be much correlation between monthly consumption and maximum demand.
If a feeder is under the jurisdiction of the applicable code, the calculated demand will be a code matter.
If the feeder is owned by the utility they will most likely use a chart based on experience and the types of loads serviced by the feeder.

Bill
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"Why not the best?"
Jimmy Carter

 

[davidbeach]

Or the utility will just look at their historical data and have the maximum demand for any reasonable recent period available at their finger tips.

 

[bacon4life]

I use monthly kWh consumption per customer for loading into our distribution power flow model. When I ran the analysis TusharB requests for our winter peak month, the residential and commercial feeders had peak feeder demands ranging from 1.1 to 1.7 times average kWh consumption. As Waross notes, going from average kW to peak kW is highly dependent on many site specific factors.