Post by RWE

What happens inside a converter station? ⚡ It’s not just a substation, or a transformer hall, nor is it just a building full of cables. It's a translator. Its job is to convert electricity between alternating current (AC) and direct current (DC) and back again. Why does that matter? Over long distances, direct current loses far less energy than alternating current. So, power travelling hundreds of kilometers – between regions, across borders, from sea to shore – increasingly moves as DC. But the grid, and most generation, runs on AC. So something has to be translated between the two. Three things inside the converter do this work:  ▪︎ Converter valves – stacks of power electronics switching thousands of times a second to reshape the current.  ▪︎ Converter transformers – matching voltage levels between the AC grid and the DC link.  ▪︎ Cooling and control systems – holding the electronics in tolerance and balancing the flow in real time. No turbines or moving parts, and barely a sound. Just current, constantly changing form.