Application of isolation transformer in synchronous voltage loop of non-synchronous close in double-side circuit breaker of transformer;

Type HXD1 locomotive uses integrated auxiliary power supply system,which auxiliary inverter is integrated in the traction inverter,the power of auxiliary inverter is obtained directly from the traction DC link and is made available with a isolation transformer and a filter.

If there are two ways of different voltage transformer secondary earthing (B earthing point,N earthing point)in a power plant or a substation, we must make a right conclusion through phasor analysis in secondary checking phase ,we may use corresponding voltage through isolation transformer to solve the problem of different earthing point in corresponding.

A new type of primary-side-assisted ZVZCS DC-DC converter with transformer isolation is presented.

This paper sums up the mode of detecting the data communication channel,and in the light of the main obstacles of the dendritic structure,develops a coupling transformer matching up to KJG2000 detecting system,which guarantees the accurate and error-free transfer of the detection data.

A series DC APF assisted with a novel coupling transformer is proposed.

Then several parameters that influrnce the system quality are studied,especially the coupling transformer.