grid transformer
1.The park is located near the Yantai and Longkou electricity grid. There are two 35 kva transformer substations with the transmission capacity of 30000 kva.
2.The paper brings out a few of measures to save energy including rational planning of grid, improvement of line loss management, public line, reactive compensation on-spot, promotion of single-phase transformer and elimination of timeworn facilities, etc.
3.Through analyzing the mathematical model of two winding transformer, the effect after on-load tap changing on voltage and reactive power balance at each side ,effect of shunt capacitor compensation on voltage and reactive power balance in substation the relation between transformer tap adjusting and shunt capacitor switching in practical grid operation were discussed.
4.With the rapid development of power industrial in our country, the protectiondevice for transformer whether can exactly, timely, reliably act, which is one of animportant factor for power grid to guarantee running securely in modern electricsystem.
5.The newly-increased annual production capacity in 1998 through capital construction projects included: 3.51 million tons of coal mining, 16.9 million kilowatts of power generation by large and medium-sized generators, 47.26 million kilovolt-amperes of power transformer equipment (including 7.79 million kilovolt-amperes of updated power grid in urban and rural areas), 13.78 million tons of oil extraction, and 2.4 billion cubic meters of natural gas. The year 1998 also saw the operation of 900 kilometers of new trunk railways, 596 kilometers of double-track railways, 995 kilometers of electrified railways, 1,478 kilometers of newly constructed express highways, 14.0 million tons of cargo-handling capacity of coastal harbors, 30,000 kilometers of long distance optical-fiber cable and 10,000 kilometers of newly constructed microwave digital telecommunication lines.
