The invention relates to a double-feed
current transformer with perfect and reliable low-
voltage ride-through capability, which consists of a rapid
internetworking switch GK, a direct-current unloading unit DBU, a
stator side dynamic power consuming unit DPC, a transient reactive
current compensation unit TSTATCOM, an AC / DC (alternating-current / direct-current) rectification switch EK, a filter, a PWM (pulse-width modulation) rectification network side
current transformer GSC, a rotor side
inverter transformer RSC and a controller KZQ. The double-feed
current transformer is provided with a port A, a port B and a port C, wherein the port A is connected with a
stator of a double-feed wind-driven power generator, the port B is connected with a
power grid, and the port C is connected with a rotor of the double-feed power generator; the
stator side dynamic power consuming unit DPC is connected with the stator of the double-feed power generator through the port A, the direct-current unloading unit is connected with public direct-current buses of the GSC and the RSC, the transient reactive
current compensation unit TSTATCOM is connected with the
power grid side, the alternating-current end of the AC / DC rectification switch EK is connected with the stator of the double-feed power generator, and the direct-current end of the AC / DC rectification switch EK is connected with the public direct-current buses; and the working state of each part of the double-feed current
transformer is controlled by signals transmitted by the controller KZQ.