SHADOW Module

Analyze and mitigate wind turbine shadow flicker

Calculate annual shadow flicker hours, days with flicker, and maximum daily impact at specific receptors (e.g. windows, patios, lawns).
Perform assessments using either worst-case scenarios (turbines always running, sun always shining) or realistic statistical models that consider:
- Actual turbine operating hours
- Wind direction sectors
- Monthly sunshine probabilities

Generate high-resolution flicker maps that account for terrain elevation, obstacles, and sun position throughout the year.
Use digital contour maps to perform ZVI (Zone of Visual Influence) analysis, checking whether a turbine and sun are visible from each receptor point.

Create shadow calendars for each receptor or turbine, showing exactly when and how long shadow flicker will occur.
These calendars can be exported and implemented directly into turbine control systems for automatic curtailment—turning turbines off during critical flicker periods to stay within allowed limits.
Use flicker downtime data in your loss and uncertainty assessments.

Define shadow receptors as:
- Points (e.g. windows or balconies)
- Areas (e.g. yards, gardens, building footprints)

Customize:
- Receptor orientation and dimensions
- Area raster size for detailed simulations
Input data for shadow simulations includes:
- Wind turbine positions and specifications (over 1,000 types in the WTG catalog)
- Obstacles like terrain, forests, or buildings
- Solar data from built-in statistical databases

The SHADOW module provides detailed, ready-to-use documentation for permitting, public consultation, or internal planning:

Includes maps of wind turbines and shadow receptors.

Summarizes shadow flicker hours per receptor.

Tabular and graphic formats showing flicker dates, duration, and intensity.

Includes monthly reduction values based on actual sunshine and turbine operations.

Identify exact times each turbine causes flicker.

Plan smart curtailment strategies to minimize energy loss while complying with regulations.

Contour maps (isolines) showing intensity across larger areas.

Fully customizable: adjust isoline values, colors, and styles.

Export options: GIS shapefiles (ArcView) and Google Earth (KMZ).

Fully compliant with international guidelines and best practices
Supports project approval processes in countries with strict shadow flicker regulations
Trusted by wind developers, consultants, and permitting authorities worldwide