In high voltage DC transmission system

converter valve is the core equipment of HVDC transmission system.TCU

as the trigger control unit of thyristor of power element of converter valve

plays an important role in reliable triggering of thyristor and needs obtaining energy from outside in the operation.In this paper

a kind of thyristor TCU energy acquisition device of high-voltage converter valve is proposed

in which the energy is from the electric supply and the power frequency isolation transformer

high voltage insulated cable as well as insulation bush are adopted for high and low electric potential isolation.The design points

overall design structure and principle

parameters calculation of magnetic ring

working principle of internal energy acquisition circuit of thyristor TCU and power parameters of external power supply for TCU are analyzed and introduced.Finally

the energy acquisition device of high-voltage converter valve thyristor TCU is tested and verified through the synthetic circuit of thyristor converter valve.It is shown by the test result that the energy acquisition device proposed in this paper can meet the TCU energy requirements of HVDC thyristor valve under normal operation of thyristor

lightning impulse environment and low voltage working conditions.