get_grids: Get the Grid-IDs from binary matrix

In windfarmGA: Genetic Algorithm for Wind Farm Layout Optimization

Get the Grid-IDs from binary matrix

Description

Retrieve the grid ID's from the binary matrix, where the binary code indicates which grid cells are used in the current wind farm constellation.

Usage

get_grids(trimtonOut, Grid)

Arguments

trimtonOut	Input matrix with binary values
Grid	Grid of the considered area

Value

Returns a list of all individuals with X and Y coordinates and the grid cell ID.

See Also

Other Helper Functions: grid_area(), hexa_area(), isSpatial(), permutations(), readinteger(), readintegerSel(), splitAt(), windata_format()

Examples

## Create a random rectangular shapefile
library(sf)
Polygon1 <- sf::st_as_sf(sf::st_sfc(
  sf::st_polygon(list(cbind(
    c(0, 0, 2000, 2000, 0),
    c(0, 2000, 2000, 0, 0)
  ))),
  crs = 3035
))

## Calculate a Grid and an indexed data.frame with coordinates and
## grid cell Ids.
Grid1 <- grid_area(shape = Polygon1, size = 200, prop = 1)
Grid <- Grid1[[1]]
AmountGrids <- nrow(Grid)

startsel <- init_population(Grid, 10, 20)
wind <- data.frame(ws = 12, wd = 0)
wind <- list(wind, probab = 100)
fit <- fitness(
  selection = startsel, referenceHeight = 100, RotorHeight = 100,
  SurfaceRoughness = 0.3, Polygon = Polygon1, resol1 = 200, rot = 20,
  dirspeed = wind, srtm_crop = "", topograp = FALSE, cclRaster = ""
)
allparks <- do.call("rbind", fit)

## SELECTION
## print the amount of Individuals selected.
## Check if the amount of Turbines is as requested.
selec6best <- selection(fit, Grid, 2, TRUE, 6, "VAR")

## CROSSOVER
## u determines the amount of crossover points,
## crossPart determines the method used (Equal/Random),
## uplimit is the maximum allowed permutations
crossOut <- crossover(selec6best, 2, uplimit = 300, crossPart = "RAN")

## MUTATION
## Variable Mutation Rate is activated if more than 2 individuals represent
## the current best solution.
mut <- mutation(a = crossOut, p = 0.3)

## TRIMTON
## After Crossover and Mutation, the amount of turbines in a windpark change
## and have to be corrected to the required amount of turbines.
mut1 <- trimton(
  mut = mut, nturb = 10, allparks = allparks,
  nGrids = AmountGrids, trimForce = FALSE
)

## Get the new Grid-Ids and run a new fitness run.
getRectV <- get_grids(mut1, Grid)
fit <- fitness(
  selection = getRectV, referenceHeight = 100, RotorHeight = 100,
  SurfaceRoughness = 0.3, Polygon = Polygon1, resol1 = 200, rot = 20,
  dirspeed = wind, srtm_crop = "", topograp = FALSE, cclRaster = ""
)
head(fit)

windfarmGA documentation built on April 4, 2025, 3:39 a.m.