Nanjing Electric independently developed UHV AC and DC wall bushings and delivered them for use

Release Time:

2022-03-16 11:19

On December 20, 2019, a UHV AC/DC wall bushing independently developed and provided by Nanjing Electric High Voltage Bushing Co., Ltd. for China Southern Power Grid Corporation was delivered at the National Engineering Laboratory of Southern Power Grid UHV Engineering Technology (Kunming). The product has a number of innovations, and its technical level is leading domestically. The insulation structure of its product is the first of its kind in the world.

This UHV AC and DC wall bushing is an AC 800 kV/DC 1000 kV composite silicon rubber jacket (oil-gas insulated) AC and DC wall bushing, which is 18 meters long and weighs 6 tons. Due to the use of new structures, new materials, and new technologies, compared with the previous oil-paper casing, the wall-through casing is not only lighter by more than 40%, but also has more excellent technical performance indicators. There are four major innovations: one is that the jacket is made of glass fiber and composite silicone rubber, which has the characteristics of light weight and good mechanical bending performance; the second is that it is filled with sulfur hexafluoride gas, which is more weight than oil dielectric insulation. Lighter weight and better insulation; third, oil-paper insulation cores are arranged at the mounting flange of the casing to evenly and solve the problem of electric field concentration; fourth, the sulfur hexafluoride gas condition in the product can be monitored and data can be transmitted Go to the main control room, real-time display, with alarm function, this function is the domestic first of similar products.