Phong Preechadechcharern 4/12/2016

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Hi. I'm currently working on the electricity generation module, and by chance encountering a problem regarding the electricity import from neighboring country. Somehow, this imported electricity is dispatched via transmission line, 300MW, and I don't know any of its information, regarding generation process ( efficiency, fuel types, etc.) How would you normally solve this problem? Do you just fill this in imported electricity under secondary resources (300*365*24 MWh)? But again I have no information regarding the term of purchases (if the transmitted electricity will be purchased every hour of the day in the year). Sorry if the question is a bit wierd.

Taylor Binnington 4/12/2016
 

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Hi Phong,

I'm not clear - do you mean that you are trying to model a 300 MW transmission line, or that you are seeing imports in your results and not sure why?

Assuming you are trying to model such a transmission line, you have many options. One of these options may be to treat the line as a 300 MW "power plant", and dispatch it together with the rest of your electricity system. Before I go into too many details, though, please clarify your question a bit.

Thanks,
Taylor

Phong Preechadechcharern 4/12/2016
 

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Yes, I tried to model that 300 MW as a power plant. But I don't really know how to, since I don't have any information regarding the 300 MW transmission line, except it is 300 MW. Would you suggest any solution?

Emily Ghosh 4/19/2016
 

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Hi Phong,

Are you trying to import a fixed quantity of electricity into the country (for example, 300*365*24 MWh per year if the transmission line functions at its full capacity all year) or are you looking to include a known import capacity of 300MW and allow this to dispatch alongside domestic power plants? This will help us determine whether modeling the imported electricity as a power plant is the right way to go.

Thanks,
Emily and Taylor

Phong Preechadechcharern 4/19/2016
 

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It would be to it as include a known import capacity of 300MW and allow this to dispatch alongside domestic power plants.

Another question, I have come across the webProhelp regarding the load factor: http://energycommunity.org/WebHelpPro/Results_Categories/Load_Factor.htm
And wasn't really well understood by the sentence "to specify whether you want to specify peak load information in the form of a detailed System Load Curve or directly as a load factor".
How can I directly specify a peak load information directly as a load factor for every year?

Emily Ghosh 4/20/2016
 

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Hi Phong,

Thank you for clarifying. In this situation, modeling the import capacity as a power plant is probably the best approach.

Before modeling the power plant, we suggest creating a new fuel to represent the imported electricity. To create a new fuel, go to General > Fuels (or click on the Fuels icon from Analysis View) and add a fuel. Name the fuel as you wish and copy the properties from an existing fuel (in this case, electricity). Then, add the power plant to your model and select the new fuel as your feedstock fuel. To complete the remaining variables, treat your transmission line in the same manner as you would your other electricity generation processes (i.e. assigning capacity, dispatch rule, etc.).

To your second question: LEAP permits you to enter load information into your electricity module for each of your model's time slices in two different ways:

a) As a percentage of peak power requirements, and
b) As a percentage of annual energy generation.

You may select among these two options under Basic Params > Loads.

In either case, you may enter data which varies across each of the time slices in your model, using a function such as YearlyShape(), as you have done in Exercise 1.4.2 of the Freedonia training exercises. You would simply enter this information into either the System Peak Load Shape or System Energy Load Shape variable (depending on which option you have selected) which appear at the top branch of your electricity module.

http://www.energycommunity.org/WebHelpPro/Supporting_Screens/Load_Shapes.htm

However, you can also enter a value or formula directly into the expression box, which would then be interpreted as a constant value for each time slice. Note that if you select b) percentage of annual energy generation, the sum of the load factors from all the time slices in a year must be equal to 100%. So, for example, if you have 10 time slices, the value in the expression box cannot be greater than 10%.

Thanks,
Emily and Taylor