The electric power transmission consists of a rectifier station, an inverter station, and an intermediate transmission line. When the energy is sent back, the rectifier station acts as an inverter, and the inverter station acts as a conversion from DC to AC. 

The main equipments of the converter station are: Converter transformer, converter, flat wave reactor, AC filter and reactive power compensation equipment, DC filter, protection device, telecontrol communication system, grounding pole line, grounding pole, etc. .