In recent years, China power transmission and distribution equipment industry has developed rapidly, and its market scale has been continuously expanding. The demand of power transmission and transformation equipment in 2008 was robust, in particular, transformer, one of the three main kind equipments of grid, entered the golden development period. From Jan to Nov 2008, the sales revenue of transformer, rectifier and inductor were together achieved CNY184.105 billion with a total profit of CNY12.04 billion, up 29.73% and 40.14% respectively over the same period of last year.
Considering the transformer, there are two development trends. One is towards the ultra-high voltage, from 220V, 330V and 500KV to 750KV and 1000KV, those products are generally applied to large power stations or large-scale power transmission, and the reliability is significant, calling for the function improvement as well as rational distribution over the electrical, magnetic, thermal and mechanical properties. The second is towards energy-saving, small size, low noise, high impedance and explosion-proof.