So…
Guess where I work these days.
The wind industry.
That means when I’m down the pub, it doesn’t usually take very long before somebody asks what I do.
Almost without fail, one of the following appears.
“They don’t work.”
“They’re always broken.”
“They’re a waste of money.”
I always smile.
Because if that were really true…
Why would they need to hire people like me?
The truth is rather less exciting.
Wind turbines break.
Of course they do.
Every form of power generation breaks.
Coal stations broke.
Gas turbines break.
Hydroelectric stations require maintenance.
Nuclear reactors shut down for planned outages.
Nothing built by humans runs forever.
Wind turbines aren’t unusual because they break.
They’re unusual because people notice when they do.
The misconception
One thing I’ve realised working in the industry is that people often treat wind power differently from every other form of electricity generation.
If a gas turbine is offline for maintenance…
Nobody really talks about it.
If a cooling tower is undergoing repairs…
Hardly anyone notices.
If one wind turbine isn’t turning…
Suddenly everyone has an opinion.
The engineering reality is much simpler.
Something spins.
A generator converts that mechanical energy into electricity.
That’s fundamentally how most large-scale electricity generation works.
Coal uses steam.
Gas uses hot combustion gases.
Hydroelectric uses falling water.
Wind uses moving air.
Different source.
Same destination.
Where does the energy come from?
Wind is really another indirect form of solar power.
The Sun heats the Earth’s surface unevenly.
Warm air rises.
Cool air moves in to replace it.
The Earth’s rotation bends those moving air masses into global weather systems.
Those weather systems create wind.
Every spinning turbine is ultimately harvesting energy that began its journey 150 million kilometres away at the Sun.
Building a wind farm
One thing that surprised me before entering the industry was just how much infrastructure exists before the first blade is ever installed.
A typical project involves:
- Wind resource assessment
- Environmental surveys
- Ground investigations
- Planning permission
- Civil engineering works
- Foundations
- Electrical infrastructure
- Crane assembly
- Turbine installation
- Grid connection
The turbine itself is only one piece of a much larger engineering project.
The hidden supply chain
Like every other energy source I’ve written about, wind power depends upon an enormous industrial ecosystem.
Including:
- Composite blade manufacturers
- Tower fabricators
- Gearbox manufacturers
- Bearing suppliers
- Power electronics specialists
- Civil engineers
- Heavy lift crane operators
- Grid engineers
- Marine contractors for offshore projects
- Maintenance engineers
A modern wind farm isn’t just renewable energy.
It’s advanced manufacturing.
Insurance and operational risk
Working in the industry has given me a real appreciation for just how much effort goes into keeping turbines operating safely.
Gearboxes and bearings
Modern turbines operate for decades under constantly changing loads.
Gearboxes.
Main bearings.
Yaw drives.
Pitch systems.
Every component experiences fatigue over millions of operating cycles.
Condition monitoring allows many faults to be detected long before they become failures.
Lightning
One risk people rarely think about.
Wind turbines are often the tallest structures for miles around.
That naturally attracts lightning.
Modern blades contain lightning protection systems designed to safely carry enormous electrical currents to earth without damaging the turbine.
Weather
Ironically, turbines are designed to stop when conditions become too extreme.
Very high winds create enormous loads.
Rather than risk structural damage, turbines automatically feather their blades and shut down until conditions improve.
Sometimes not generating electricity is exactly the right engineering decision.
Access
Maintenance isn’t always straightforward.
Some turbines stand over 100 metres tall.
Offshore turbines require specialist vessels.
Weather windows.
Careful planning.
Simply reaching the equipment can become part of the engineering challenge.
The political problem
Wind power has become one of the most politically discussed forms of energy.
Sometimes it’s praised as the future.
Sometimes it’s dismissed as useless.
The reality is much less dramatic.
Wind isn’t designed to do everything.
It’s one part of a much larger electricity system.
One criticism you often hear is:
“What happens when everyone boils the kettle at half-time during the England match?”
It’s a fair question.
The answer is…
Wind farms were never intended to carry that responsibility alone.
National grids work because multiple generation technologies operate together.
Gas.
Hydro.
Nuclear.
Interconnectors.
Battery storage.
Pumped storage.
Solar.
Wind.
Each has strengths.
Each has weaknesses.
The job of the grid is to combine them.
Why build them?
Despite all the debate, one fact remains remarkably consistent.
Once a wind turbine has been built, the fuel is free.
There are no fuel deliveries.
No mines.
No pipelines.
No ships arriving from overseas.
Operating costs are relatively low compared with many conventional power stations.
That doesn’t make wind perfect.
Far from it.
But it does make it one of the cheapest sources of new electricity generation in many parts of the world when conditions are favourable.
The strategic lesson
Working in the wind industry has probably changed one thing more than anything else.
I no longer see turbines.
I see engineering.
Composite materials.
Power electronics.
Gearboxes.
Sensors.
Data.
Predictive maintenance.
Insurance.
Grid integration.
Thousands of people quietly keeping infrastructure running.
When someone in the pub tells me…
“They’re always broken.”
I usually just smile.
Everything breaks eventually.
The real question isn’t whether something fails.
It’s whether we’ve designed the system well enough to detect it, repair it and keep producing reliable electricity for the next twenty or thirty years.
Because at the end of the day…
Whether the thing turning the generator is steam…
Water…
Gas…
Or the wind…
The engineering challenge has always been remarkably similar.
Turn something reliably.
Keep it turning safely.
And deliver electricity when people need it.
Gareth Winterman