A HVDC converter is like a special machine that helps move electricity from one place to another. When we use electricity, it usually goes through wires that bring it to our homes or buildings. But sometimes, we need to move electricity really far away, like across countries or even under oceans. HVDC converters help us do that.
Basically, HVDC converters take the electricity from the wires and change it into a special kind of electricity called direct current (DC). This is different from the kind of electricity we use in our homes, which is called alternating current (AC). DC electricity is better for traveling long distances because it doesn't lose as much energy as AC electricity does.
Once the HVDC converter has changed the electricity to DC, it sends it through special cables that can carry it really far without losing too much energy. When the DC electricity gets to where it needs to go, another HVDC converter changes it back into AC electricity so we can use it in our homes and buildings like before.
So in short, HVDC converters help move electricity really far away by changing it to a different type of electricity that can travel longer distances without losing too much energy.