Method for Suppressing Corona Discharge and Pollution of DC Transmission Line and Dielectric-coated Pole Conductor

Abstract

A method for suppressing corona discharge and fouling of a direct current transmission line and a dielectric-coated conductor. A dielectric layer is coated on the surface of the pole conductor, and a dielectric barrier discharge is formed when the corona discharge occurs on the pole conductor. During the discharge process, the opposite polarity charges are outside the dielectric layer. The surface is continuously attached and accumulated, the direction of the original electric field of the pole wire is opposite to that of the electric field generated by the opposite polarity charge, and the electric field of the opposite polarity charge weakens the original electric field, so the corona discharge will weaken. When the synthetic electric field strength is lower than the corona field strength , the corona discharge will stop; through the formation of dielectric barrier discharge, reduce the electric field intensity around the pole wire, suppress corona discharge, reduce the charge amount of space pollution particles, and lead to the electrostatic force that drives the space pollution particles to accumulate after being charged Reduced to prevent fouling. The invention is beneficial to suppress the corona discharge of the high-voltage direct current transmission line, reduce the corona loss, improve the electromagnetic environment, reduce pollution, and reduce the risk of external insulation pollution flashover and equipment breakdown.

Description

technical field [0001] The invention proposes a method for suppressing corona discharge and fouling of a direct current transmission line and a dielectric-coated electrode wire, which belong to the fields of corona discharge of direct current transmission lines and electromagnetic environment control and protection. Background technique [0002] DC transmission has the advantages of strong power transmission capacity, low loss, unlimited transmission distance, and asynchronous networking between AC systems on both sides. It has been industrialized in point-to-point and large-capacity power transmission between different regional power grids. Currently, there are ±500kV , ±660kV EHV transmission project, ±800kV, ±1100kV UHV transmission project operation. In recent years, due to the reverse distribution of energy demand and resource endowment in my country, energy demand is mainly concentrated in the economically developed regions in the eastern and central regions, while coa...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of continuous deterioration of corona discharge, continuous increase of corona loss, and continuous deterioration or even exceeding of the electromagnetic environment (ion current density, synthetic field strength, radio interference) existing in the long-term operation of overhead DC transmission lines, in order to reduce the pollution caused by DC pollution reduce the risk of flashover, reduce the damage caused by partial discharge caused by pollution, and reduce the workload of cleaning operation and maintenance. The invention proposes a method for dielectric barrier suppression of corona discharge and pollution

Images