High-voltage direct-current power transmission line induction energy taking device and method based on demagnetizing inductance filtering magnetic circuit

The invention discloses a high-voltage direct-current power transmission line induction energy taking device and method based on a demagnetizing inductance filtering magnetic circuit. By winding a demagnetizing coil around and connecting a demagnetizing inductor in parallel to a second magnetic circuit branch of a CT iron core, and winding an energy taking coil around and connecting a load and anequivalent magnetism-assisting capacitor in parallel to a third magnetic circuit branch, shunting of a pulsed magnetic flux component in the third magnetic circuit branch is realized. Furthermore, a direct-current magnetic flux restraining unit (open air gap) is additionally arranged on the third magnetic circuit branch, so that shunting of a direct-current magnetic flux component in the second magnetic circuit branch is realized. According to the overall structure of the induction energy taking device, an equivalent magnetic circuit model is established, and mathematical models of pulsed magnetic flux and direct-curr