antaresRead (version 2.7.0)

removeVirtualAreas: Remove virtual areas

Description

This function removes virtual areas from an antaresDataList object and corrects the data for the real areas. The antaresDataList object should contain area and link data to function correctly.

Usage

removeVirtualAreas(
  x,
  storageFlexibility = NULL,
  production = NULL,
  reassignCosts = FALSE,
  newCols = TRUE,
  rowBal = TRUE,
  prodVars = getAlias("rmVA_production"),
  costsVars = c("OV. COST", "OP. COST", "CO2 EMIS.", "NP COST"),
  costsOn = c("both", "storageFlexibility", "production")
)

Value

An antaresDataList object in which virtual areas have been removed and data of the real has been corrected. See details for an explanation of the corrections.

Arguments

x

An object of class antaresDataList with at least components areas and links.

storageFlexibility

A vector containing the names of the virtual storage/flexibility areas. Can also be a named list. Names are columns to add and elements the virtual areas to group.

production

A vector containing the names of the virtual production areas.

reassignCosts

If TRUE, the production costs of the virtual areas are reallocated to the real areas they are connected to. If the virtual areas are connected to a virtual hub, their costs are first reallocated to the hub and then the costs of the hub are reallocated to the real areas.

newCols

If TRUE, new columns containing the production of the virtual areas are added. If FALSE their production is added to the production of the real areas they are connected to.

rowBal

If TRUE, then BALANCE will be corrected by ROW. BAL: BALANCE := BALANCE - "ROW. BAL"

prodVars

Virtual productions columns to add to real area. Default to getAlias("rmVA_production")

costsVars

If parameter reassignCosts is TRUE, affected columns. Default to OV. COST, OP. COST, CO2 EMIS. and NP COST

costsOn

If parameter reassignCosts is TRUE, then the costs of the virtual areas are reassigned to the real areas they are connected to. You can choose to reassigned production & storageFlexibility virtuals areas ("both", default), or only "production" or "storageFlexibility" virtuals areas

Details

Two types of virtual areas have been defined corresponding to different types of modeling in Antares and different types of post-treatment to do:

• Flexibility/storage areas are areas created to model pumping unit or any other flexibility that behave as a storage. For those virtual areas, the important results are flows on the links.

• Production areas are areas created to isolate some generation from the "real" areas. They can be isolate for several reasons: to distinguish time-series (for example wind onshore/offshore), to select some specific unit to participate to day-ahead reserve, etc.

removeVirtualAreas performs different corrections:

• Correct the balance of the real areas (and districts) by removing the flows to or from virtual areas.

• If parameter reassignCosts is TRUE, then the costs of the virtual areas are reassigned to the real areas they are connected to. The default affected columns are OV. COST, OP. COST, CO2 EMIS. and NP COST. If a virtual area is connected to a single real area, all its costs are attributed to the real area. If it is connected to several real areas, then costs at a given time step are divided between them proportionally to the flows between them and the virtual area. An aggregation is done at the end to correct districts costs.

• For each storage/flexibility area, a column named like the area is created. It contains the values of the flow between the virtual area and the real areas. This column is interpreted as a production of electricity: it is positive if the flow from the virtual area to the real area is positive and negative otherwise. If parameter newCols is FALSE, the values are added to the variable PSP and the columns is removed. An aggregation is done at the end to add virtual storage/flexibility to districts.

• If the parameter production is specified, then the non null productions of the virtual areas are either added to the ones of the real areas they are connected to if newCols = FALSE or put in new columns if newCols = TRUE. In the second case the columns are named *_virtual where "*" is a type of production (wind, solar, nuclear, ...). Productions that are zero for all virtual areas are omited. If virtual production areas contains clusters then they will be move to the real area. An aggregation is done at the end to add virtual production to districts.

• Finally, virtual areas and the links connected to them are removed from the data.

The functions makes a few assumptions about the network. If they are violated it will not act correctly:

• storage/flexibility areas can be connected to other storage/flexibility areas (hubs), but at least one of them is connected to a real area. That means that there is no group of virtual areas disconnected from the real network. If such a group exists, you can either remove them manually or simply not import them.

• production areas are connected to one and only one real area. They cannot be connected to virtual areas. But a real area may by connected to several production areas.

Examples

if (FALSE) {

# Assume we have a network with two virtual areas acting as pump storage and
# an area representing offshore production
#
#  offshore
#     |
# real area - psp in
#           \
#             psp out
#

data <- readAntares(areas="all", links="all")

# Remove pump storage virtual areas

correctedData <- removeVirtualAreas(
    x = data, 
    storageFlexibility = c("psp in", "psp out"),
    production = "offshore"
)
                                    
correctedData_list <- removeVirtualAreas(
    x = data, 
    storageFlexibility = list(PSP = c("psp in", "psp out")),
    production = "offshore"
)
 
                                   
correctedData_details <- removeVirtualAreas(
    x = data, 
    storageFlexibility = list(PSP_IN = "psp in", PSP_OUT =  "psp out"),
    production = "offshore"
)
                                    
}