66 kV (110 kV) voltage class wind power generation boosting transformer

Abstract

The invention provides a 66kV (110kV) voltage class wind power generation boosting transformer. The rated capacity ranges from 2200 kVA to 11000 kVA; the rated voltage of the low-voltage side is 0.69kV; the voltage class of the high-voltage side can reach 66 kV (110 kV); the voltage class of the primary side of the existing box-type transformer substation is improved from 35kV to 66kV (110kV); the transformer comprises an iron core, a low-voltage winding, a high-voltage winding, an oil tank, transformer oil, a low-voltage lead, a high-voltage lead, a low-voltage sleeve, a high-voltage sleeve,an oil storage cabinet, a gas relay, a pressure release valve, a tapping switch, an oil level thermometer, a winding thermometer, a sleeve type current transformer and a moisture absorber. Empty loadloss is superior to national standards, the problems that an existing distributed access wind power generation network is small in coverage area and limited in absorption capacity are solved, the requirements for on-site installation, distributed access and on-site absorption of a distributed wind power generation are met, and the boosting transformer can be properly used as a distributed wind power generation boosting transformer.

Description

technical field [0001] The invention relates to the technical field of electric power supply, in particular to a series of step-up transformers dedicated to wind power generation with a voltage level of 66kV (110kV). Background technique [0002] Wind energy is a renewable clean energy. Internationally, significant progress has been made in both theoretical research and applied research in the utilization of wind energy. The wind power generation technology is becoming more and more perfect, and the maximum rated power of a grid-connected wind power generator has reached 7MW. In the future, the development speed of wind power technology and industry at home and abroad will be significantly accelerated. [0003] The existing wind turbines have a single unit capacity of 1.5-7MW, and the outlet voltage of the wind turbine is 0.69kV, which is boosted to a voltage level of 35kV by a step-up transformer, and then the main transformer of the wind farm raises the voltage level of ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low primary side voltage, short network transmission distance, small coverage area and limited capacity of consumption of the existing step-up transformer dedicated to wind power generation, the present invention provides a 66kV (110kV) voltage level wind power step-up transformer with a rated capacity of 2200kVA~ 11000kVA, the rated output voltage level of the primary side is 66kV (110kV), the rated voltage of the secondary side is 0.69kV, and the frequency is 50Hz. All technical parameters are about 15% lower than the national standard requirements. The operating efficiency is high and the operating cost is reduced by 15%. It is a fully sealed maintenance-free product with compact structure, reliable protection of personal safety, low loss, no pollution, green environmental protection, and long service life

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