Corona generating and measuring device of high-voltage DC wire

The invention discloses a corona generating and measuring device of a high-voltage DC wire. The corona generating and measuring device comprises a base and a corona cage, wherein the base is a U-shaped base, the corona cage is placed in the middle of the U-shaped base, and the corona cage is of a hollow cylinder structure; the middle of the corona cage is a measurement segment, the two sides of the corona cage are protection segments, and the measurement segment and the protection segments are all connected to ground potential; the middle of the corona cage is provided with the wire, and the wire and the corona cage form a coaxial electrode system; the two ends of the wire are provided with voltage-sharing devices, one voltage-sharing device is connected with a high-voltage DC source, the two ends of the high-voltage DC source are connected to a voltmeter in parallel, and the measurement segment is connected to an ampere meter. According to the corona generating and measuring device of the high-voltage DC wire, the corresponding current change of a positive corona and the corresponding current change of a negative corona of the copper wire can be measured, and therefore the influences on corona volt-ampere characteristics by the surface roughness of different wires under the condition of different voltage polarities can be measured.