The essence of the corona effect is the partial discharge phenomenon caused by the ionization of air molecules when the electric field strength on the surface of a high-voltage transmission line exceeds the air breakdown field strength. The generation of corona effect is closely related to circuit design, material selection, and operating environment. When there are defects such as burrs and scratches on the surface of the wire, or the radius of curvature of the line is too small, the local electric field will quickly concentrate, and corona may be triggered even at normal operating voltage. In addition, environmental factors such as humidity, haze, and high altitude will reduce the air breakdown voltage, further exacerbating the probability and intensity of corona phenomenon. In the traditional response measures, although increasing the cross-sectional area of the wire and optimizing the structure of the split wire can alleviate the problem to a certain extent, it is difficult to achieve the best results in all scenarios due to engineering costs and circuit design compatibility, especially in UHV lines or complex geographical environments, the limitations of these methods are even more prominent.
In the long-term practice of serving global power customers, we recognize that targeted solutions to the problem of electric field concentration are a breakthrough in reducing the corona effect. Based on this concept, the corona ring coil we developed relies on innovative design and excellent performance, and has become the preferred solution for power grid operators in more than 20 countries and regions around the world. This corona ring coil is made of high-strength alloy material, the surface has been precision polished and anticorrosive treatment, not only has good mechanical strength and weather resistance, but also can effectively improve the electric field distribution of key nodes of the transmission line through the unique arc structure design. 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.
As of 2024, our corona ring coil has been successfully used in a number of key global transmission projects, including a 500kV cross-border transmission line in Southeast Asia, a 220kV renewable energy grid-connected project in Sub-Saharan Africa, and an UHV grid upgrade project in Europe. These cases not only verify the performance and reliability of corona ring coil, but also reflect our in-depth understanding of the operating environment of power grids in different regions. We can provide customers with customized technical solutions to optimize the structural parameters and installation plans of corona ring coil according to the voltage level, climatic conditions, terrain characteristics and other factors of the project area, so that corona ring coil can achieve the best results.
For global power buyers, choosing the right corona ring coil is not only a technical decision, but also a strategic investment in the long-term safety and economic benefits of the power grid. We believe that relying on innovative technology, reliable products and professional services, our corona ring coil will become an ideal choice for global power companies to reduce the corona effect and improve the performance of the power grid. Whether you need to support anti-corona equipment for new transmission projects or plan to upgrade existing lines, we look forward to establishing in-depth cooperation with you.