High-voltage direct current

A thyristor (, from a combination of Greek language θύρα, meaning "door" or "valve", and transistor) is a solid-state semiconductor device which can be thought of as being a highly robust and switchable diode, allowing the passage of current in one direction but not the other, often under control of a gate electrode, that is used in high-power applications like inverters and radar generators. It usually consists of four layers of alternating P- and N-type materials. It acts as a bistable switch (or a latch). There are two designs, differing in what triggers the conducting state. In a three-lea

electric power transmission system

Operation and description of the mercury-vapour rectifier

a wide area transmission network that makes it possible to trade high volumes of electricity across great distances

specialised type of electrical substation which converts direct current to alternating current or the reverse