“Energizing the HV substation and soaking the transformer is a major milestone for our project,” says Jesper Storebjerg Jensen, Grid Integration Director.

“It’s always a bit nerve-wracking because the transformer plays a critical role—it collects all the power generated by the solar PV plant and channels it into a single high-voltage power line. A failure at this stage would be costly. But thanks to strong collaboration between our suppliers, contractors, and partners, everything worked as planned. The transformer has now been de-energized again while the HV substation is finalized.”

What is Transformer Soaking?
“Soaking” is a technical term for applying high voltage to a transformer without connecting it to any load. This test ensures that the transformer has not sustained damage during transportation. Because even small defects can lead to major failures, soaking is a final safeguard before the transformer is put into full operation. Before soaking, various tests are performed to detect any potential damage:

Shock Recorders: These devices track any impact or jolts the transformer experiences during transportation by crane, train, ship, or truck.

Low-Voltage Tests: Small amounts of voltage and current are applied to check for installation errors or damage.

Final Soaking Test: Full high voltage is applied, but without any load, ensuring the transformer is structurally sound.

With this milestone achieved, BeGreen moves one step closer to bringing sustainable energy to the grid—safely and efficiently.