Device and method for obtaining energy from high voltage transmission line

The invention discloses a device and a method for obtaining energy from a high voltage transmission line, and belongs to the technical field of high voltage technologies and power source technologies.The device comprises a high-voltage capacitor, a first-stage step-down transformer, a bidirectional thyristor module, a rectifier module, a filter capacitor, a voltage monitoring module, a thyristordrive module, a DC/DC voltage regulator module, an overvoltage suppression module and a shielding box. The principle of capacitance voltage division is employed, the high-voltage capacitor set is connected in series with the primary side of the transformer to effectively improve the output power of the device for obtaining energy, two-stage voltage reduction is employed to reduce the insulation design requirement of the transformer and reduce the size of the transformer. The wiring mode is flexibly configured between the high-voltage capacitor and the first-stage step-down transformer to achieve energy obtaining at a h