NEWS.md

In windfarmGA: Genetic Algorithm for Wind Farm Layout Optimization

Updates 3.0.0

• The dependencies sp, spatstat were removed and replaced by sf. All spatial outputs are now Simple Features. A Shapefile Polygon can still be passed as input to genetic_algorithm / windfarmGA, but more underlying functions now require the Polygon to be of type Simple Feature.
• The functions grid_area & hexa_area are now calculated with sf::st_make_grid.
• The new dependency elevatr has been added because it provides elevation data with a higher resolution compared to raster::getData.
• Several dependencies that are not essential for the algorithm were moved to Suggests.
• Bugfix for the calculation of the visibility analysis. #17
• The viewshed parameter h1 can now also be a numeric vector with different height offsets. #18
• The grid_area argument resol changed to size.
• The arguments for get_dist_angles have changed to match the arguments of turbine_influences.

Updates 2.3.0

• Due to the changes in the PROJ 6 library and its handling of coordinate reference systems, some adjustments were necessary. Attempts were made to ensure backward compatibility. However, warnings like the following are now increasingly displayed: sh Warning message: In showSRID(uprojargs, format = "PROJ", multiline = "NO", prefer_proj = prefer_proj) : Discarded datum European_Terrestrial_Reference_System_1989 in CRS definition

Updates 2.2.3

• Fix tests for R 3.4.0, as class(matrix) is of length 2.
• Expose more options which can be set with options(windfarmGA.cT = 0.75):

Options = Default value | Description ----------------------------------| ------------------------ windfarmGA.cT = 0.88 | Wind Turbine Thrust coefficient windfarmGA.air_rh = 1.225 | Air Density Value windfarmGA.k = 0.075 | Wake expansion coefficient. It is assumed to be 0.075 for onshore windfarms and 0.05 for offshore windfarms windfarmGA.max_angle = 20 | Maximum angle (in degrees) to search for potential influencing turbines windfarmGA.max_distance = 100000 | Maximum distance (in meters) to search for potential influencing turbines windfarmGA.max_population = 300 | Maximum amount of individuals per generation windfarmGA.max_selection = 100 | Maximum amount of selected individuals

Updates 2.2.2

Pkgdown

• A pkgdown documentation site is now available.

Renaming Functions

• Almost all functions have been renamed to have a consistent appearance and a clearer meaning. The old functions still exist, but are deprecated now.

Renaming Overview

Old names | New names --------------------- | --------------------- StartGA | init_population selection1 | selection crossover1 | crossover VekWinkelCalc | get_dist_angles calculateEn | calculate_energy getRects | get_grids BaroHoehe | barometric_height GridFilter | grid_area HexaTex | hexa_area InfluPoints | turbine_influences genAlgo | genetic_algorithm RandomSearch | random_search RandomSearchTurb | random_search_single RandomSearchPlot | plot_random_search leafPlot | plot_leaflet heatmapGA | plot_heatmap plotbeorwor | plot_development plotCloud | plot_cloud plotEvolution | plot_evolution plotfitnessevolution | plot_fitness_evolution plotparkfitness | plot_parkfitness plotResult | plot_result PlotWindfarmGA | plot_windfarmGA plotWindrose | plot_windrose

Bugfixes / Other Changes

• The legend of plot_leaflet now works correctly.

• Some general linting / spell checking / performance optimization was done.

• The Weibull Raster (for Austria) are now in a separate Github-repository, instead of being stored in the package as .rda file. I guess this never worked except on my computer.

• The Corine Land Cover .tif file is also stored in that repository, as the EEA webpage did restrict downloads sometimes, which resulted in an error.

• The plot_farm_3d function has temporarily been removed from the package.

• Most functions that required user-input previously used readline which is now changed to readLines as it allows to read from a file instead. This can be set via options(windfarmGA.connection = file()).

• A whole lot of tests were written.

Updates 2.2.1

Performance Tuning / Restructuring

• Switch to matrices instead of data.frames and a lot of restructuring and performance optimization of the whole algorithm.

Viewshed Analysis

• New set of functions, to analyze the visual impact of a wind farm.
  • cansee,
  • viewTo,
  • rasterprofile,
  • viewshed,
  • plot_viewshed,
  • interpol_view,
  • getISO3,
  • getDEM

Other Changes

• The function genAlgo/windfarmGA and the plotting functions now accept SimpleFeature Polygons or coordinates in table format with long, lat or x, y column names. The terrain effect model can now be activated only by setting topograp to TRUE and it will attempt to download the land cover raster from the European Environment Agency website.

• plot_farm_3d Experimental rayshader function

Updates 1.2.1

Randomization

The output of genAlgo or windfarmGA can be further randomized/optimized with the following functions: - RandomSearch - RandomSearchTurb

RandomSearch is used to randomize all turbines of the layout

RandomSearchTurb is used to randomize a single turbine

RandomSearchPlot is used to plot the output of those functions, comparing them with the original result.

load(file = system.file("extdata/resultrect.rda", package = "windfarmGA"))
load(file = system.file("extdata/polygon.rda", package = "windfarmGA"))
Res = RandomSearchTurb(result = resultrect, Polygon1 = polygon, n=10)
RandomSearchPlot(resultRS = Res, result = resultrect, Polygon1 = polygon, best=2)

Updates 1.2

Parallel Processing

## Runs the same optimization, but with parallel processing and 3 cores.
result_par <- genAlgo(Polygon1 = Polygon1, GridMethod ="h", n=12, Rotor=30,
                 fcrR=5,iteration=10, vdirspe = data.in,crossPart1 = "EQU",
                 selstate="FIX",mutr=0.8, Proportionality = 1,
                 SurfaceRoughness = 0.3, topograp = FALSE,
                 elitism=TRUE, nelit = 7, trimForce = TRUE,
                 referenceHeight = 50,RotorHeight = 100,
                 Parallel = TRUE, numCluster = 3)
PlotWindfarmGA(result = result_par, GridMethod = "h", Polygon1 = Polygon1)

Updates 1.1

Optimization with Hexagonal Grid Cells

result_hex <- genAlgo(Polygon1 = Polygon1, GridMethod ="h", n=12, Rotor=30,
                  fcrR=5,iteration=10, vdirspe = data.in,crossPart1 = "EQU",
                  selstate="FIX",mutr=0.8, Proportionality = 1,
                  SurfaceRoughness = 0.3, topograp = FALSE,
                  elitism=TRUE, nelit = 7, trimForce = TRUE,
                  referenceHeight = 50,RotorHeight = 100)
PlotWindfarmGA(result = result_hex, GridMethod = "h", Polygon1 = Polygon1)

windfarmGA documentation built on May 5, 2021, 5:08 p.m.