Energy charges and time of use

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Linh Nguyen
Topic Author

31 Oct 2022 05:49 - 31 Oct 2022 16:02 #11615 by Linh Nguyen

Energy charges and time of use was created by Linh Nguyen

Hi SAM,
Currently we would like to model the energy charges for Vietnam's Commercial&Industrial rates as below:
Normal: 2442VND/kWh - apply to Mon-Sat (4-9.30am, 11.30am-5pm, 8pm-10pm), Sun (4am-10pm)
On peak: 4251VND/kWh - apply to Mon-Sat (9.30am-11.30am, 5pm-8pm), no on peak for Sunday
Off peak: 1361VND/kWh - apply to all day of the week (10om-4am)

As you can see, our rate is different for Saturday and Sunday, therefore, the "weekend" option on SAM would not allow me to customer the rates according to the Saturday and Sunday's schedule. Is there a way to address this?

...charge-tou.png

Last edit: 31 Oct 2022 16:02 by Paul Gilman.

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Paul Gilman

31 Oct 2022 16:09 #11616 by Paul Gilman

Replied by Paul Gilman on topic Energy charges and time of use

Hi Linh Nguyen,

SAM makes several simplifying assumptions for electricity bill and other time dependent calculations:

January 1 is a Monday
Weekends are Saturday and Sunday
Leap days (February 29) are omitted
No time change for daylight savings

These conventions are described in the "Sun and Time Convention" Help topic:

samrepo.nrelcloud.org/help/weather_time_convention.htm

If you are using the Net Billing, Net Billing with Carryover to Next Month, or the Buy All / Sell All metering and billing option, you can use time series (hourly or subhourly) buy or sell rates instead of the rates defined by the energy rate table and weekday/weekend schedule matrix. That would require that you create the time series data outside of SAM.

Best regards,
Paul.

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Linh Nguyen
Topic Author

01 Nov 2022 03:12 #11626 by Linh Nguyen

Replied by Linh Nguyen on topic Energy charges and time of use

Thanks Paul for the quick reply.

Then probably I can only import the electricity rates in this case through the second method (Buy All/Sell All). Will try this and see if that works.

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Energy charges and time of use

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