Openwind Features

A state-of-the-art wind farm design and optimization software used throughout a wind project’s development to create optimal turbine layouts that maximize energy production, minimize energy losses, account for plant development costs and generate overall project efficiencies.


Openwind Benefits

  • Determine the best layout balancing energy output with construction costs using the AWST exclusive Cost of Energy Optimization module
  • Deep Array Wake Modules are more accurate than leading competing modules and are essential for estimating wake losses for utility-scale wind farms
  • Software developed drawing on over 30 years of consulting expertise assures confidence from financial institutions
  • Compatibility with other wind software enables seamless file sharing & easy migration of existing procedures


Maximize Energy Production

Cost of Energy Optimization

Optimize layouts and turbine positions to minimize the cost of energy, taking into account energy production, O&M costs and capital costs including turbine and plant development costs. Understand the impact each turbine has on the bottom line.

Arrive at the best layout by taking into account:

  • Access road costs
  • Collector system costs
  • Waterways, pipelines, fence-lines, wetlands and more
  • Substation & grid connection locations
  • Electrical losses
  • Power Purchase Agreement length
  • Operations & Management costs.
  • Wind resource and wake losses


Gridded Turbine Layers

  • Quickly create and modify gridded turbine layouts using the user-friendly GIS interface
  • Design by hand using intuitive graphical tools
  • Allow optimizer to determine downwind and crossing spacing, grid orientation and obliquity


Reduce and Quantify Uncertainty

  • Model environmental and directional curtailments
  • Take account of measurement uncertainty, MCP uncertainty and modelling uncertainty
  • Assign turbines to met masts, adjust WRGs and run energy estimates
  • Let the software suggest additional sites for met masts to extend the monitoring campaign and minimize project uncertainty


Multiple Design Turbine Layout Option

Analyze multiple turbine layout options for cost effectiveness including different hub heights & turbine types


Minimize Energy Loss Deep Array Wake Models (DAWM) & Standard Wake Models

  • Leading-edge wake models consider the dynamic interactions between turbines and atmospheric boundary layer as well as allowing wakes to vary with turbulence intensity and stability
  • Openwind offers users 5 different customizable wake models to choose from including
  • Modified Park
  • O. Jensen
  • Eddy-Viscosity
  • Deep Array Wake Models (Park & Eddy-Viscosity versions)


Time Series Energy Capture (12x24s, annual or long-term time series at hourly or 10 minute intervals

  • Run energy capture calculations that take into account time-varying temperature, air density, and turbulence intensity
  • Model realistic availability using Markov chain models, which can vary with season
  • Model high wind hysteresis, low- and high-temperature shutdown losses
  • Diurnally varying wake losses
  • Icing losses based on met data
  • Parasitic consumption, blade heating & electrical losses
  • Effects of bat curtailment and NRO modes
  • Output results for entire project or individual turbines


Directional Curtailment, Inflow Angle, Turbulence

  • Model effects of directional curtailment by specifying curtailment strategy in detail or by setting criteria for automatic sector management


Non-Ideal Performance Losses

Use multi-height met mast data to assess the effects of non-standard shear using the rotor equivalent wind speed and adjust power curves for different ranges of turbulence intensity


Environment Management

Noise modeling – based on ISO 9613-2

Vary atmospheric attenuation based on ISO 9613-1

Optional attenuating effects of foliage

Automatically generate NRO strategies based on noise constraints

Turbine Scheduling (Noise, Bat, Shadow-Flicker Curtailments)

Shadow Flicker

Take account of wind time-series data

Take account of sunshine hours

Visual Impact Modeling (variety of ZVI measurements



Effective Turbulence Intensity

  • Implements IEC 61400-1 editions 2, 3, & 3 amendment 1
  • Allows customization of those elements open to interpretation
  • Facilitates easy comparison of turbines to their appropriate IEC curve
  • Automatically generate wind sector management strategy to meet IEC requirement
  • Optimize layouts while taking account of likely wind sector management losses
  • Set suitability limits for turbine layouts based on the appropriate IEC standard


Work Efficiencies Exporting Options

Exporting Options

  • Users can output KML file (Google Earth/Maps) showing one or more wind farms from currently selected point of view
  • Access and create online repositories of 3D turbine models and animate blades
  • Provides digitally signed reports to ensure authenticity


Files Accepted

  • Images (PNG, BMP, JPG, GIF, TIF),
  • Vector Layers (WAsP maps and Shape files containing points, polylines, polygons)
  • Reclassify images and gridded data using a variety
  • of tools
  • Accepts gridded data files (ASC, ADF, TIF, GRD, RST, DTM, BIL, XYZ etc.

GPS Integration

  • Take Openwind into the field to conduct ground truthing and run energy simulations in the field on a laptop or tablet


Scripting Tool

  • Queue up operations and load sets of queued operations in XML format or run from command line (talk to us if you need headless HPC or Linux/Unix versions)


Validated Energy Capture

  • Validated against other models as well as many years of operational data to ensure you get quality results