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​The corona effect is a special discharge phenomenon under a high-voltage electric field. When the line voltage rises to a certain extent, the charge density on the surface of the wire increases abruptly, especially at the tip, joint or burr, the electric field strength will be quickly concentrated.

The main purpose of corona ring coil​ is to suppress the corona discharge phenomenon of high-voltage equipment and protect the insulation system of the equipment from the root cause. The secondary purpose of corona ring coil is to reduce energy loss and electromagnetic interference and improve the overall energy efficiency of the transmission system. In addition, the use of corona ring coil in simplifying the operation and maintenance process and reducing long-term operating costs is in line with the pursuit of project economy by B-side buyers.

Our corona ring coil adopts a streamlined arc structure, and the curvature and diameter of the ring body are accurately optimized through finite element analysis software, so that the electric field strength on the surface of the conductor can be evenly dispersed to the surface of the ring body, completely eliminating the concentration of the electric field, and avoiding the generation of corona discharge from the source.

Corona ring coil can evenly disperse the locally concentrated electric field intensity to the surface of the ring, control the electric field gradient below the air breakdown field strength, and suppress the generation of corona discharge from the source.

From the principle point of view, corona discharge is a partial discharge phenomenon caused by the ionization of air under a high-voltage electric field. It is commonly found on the tip or irregular surface of high-voltage power transmission and transformation equipment, power capacitors, transformers and other equipment.

​The generation of corona stems from the fact that the electric field strength on the surface of the high-voltage conductor exceeds the critical value of air breakdown, resulting in the ionization of air molecules to form a partial discharge.