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Wind technician descending turbine shaft ladder.

How do we test wind turbines?

Before freshly constructed wind turbines start to spin and generate renewable energy, there’s a crucial step in the process – commissioning. This is the test phase that marks the beginning of the turbine’s operational journey.  

First, the original equipment manufacturer (OEM) tests all the mechanical and electrical pieces of the wind turbine. Each turbine must run continuously for a set amount of time, producing a specific amount of energy to earn the seal of approval. If anything goes wrong, the OEM team steps in, fixes it and restarts the cycle.  

There are many moving parts to test during commissioning, such as blades, motors, wires and generators. The OEM tests physical connections as well as all software used to operate the turbines.  

The software that monitors and controls our wind turbines is called the Supervisory Control and Data Acquisition (SCADA) system. Information technology experts test SCADA system components such as faults for temperature, voltage and pressure. These metrics are monitored by sensors on and around the turbines that act as gatekeepers to make sure everything meets operating standards.  

Our team also tests noise from the turbines. We consider local ordinances and residents who live near the project when we test for noise pollution. Our goal is always to minimize disruption to nearby residents.  

To minimize sound disruption, this includes installing sound-dampening technology called serrations in the trailing edges of the turbines. We monitor sound output at a set distance from the wind farm to test for noise pollution. The amount of sound recorded should be equal or less than the amount specified by local ordinances and the OEM’s advertised noise level rating.  

Per Federal Aviation Administration regulations, each turbine has lights that we also test during commissioning. We track broken and burnt-out lights through SCADA. Newer technology ensures lights only shine when a plane is nearby to minimize light pollution from the turbines. 

Substations, the physical location where energy goes onto the transmission grid, are the final piece of the commissioning phase. Energy generated at turbines travels underground to substations, and we need to test all the pieces that connect turbines to the substation and the station to the transmission grid.  

Only after we test every component can the electricity turbines produce flow to the grid – and commissioning is only one important stage in the process. Learn more about how we plan wind projects and build wind farms.  
Grant Barton is a Communications Partner with a passion for sustainability and eco-friendly city planning. He has a diverse background in engineering, politics and international communications and hopes to apply this experience when writing and breaking down complex topics related to Alliant Energy's Clean Energy Future plans.

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