Wind power generation boosting transformer and power transformation system for wind power direct-current power transmission and transformation

Abstract

The invention discloses a wind power generation boosting transformer, which comprises an iron core, two or more high-voltage coils arranged at the output end and a low-voltage coil arranged at the input end, wherein the high-voltage coils respectively correspond to different phase shift angles, so that the harmonic wave of the output voltage is reduced, direct-current power transmission is realized by matching with a rectifier. Compared with the prior art in which a double-winding transformer is usually adopted to carry out voltage transformation transmission on alternating current in a wind power transmission and transformation project and the loss is high, the loss of a wind power generation system is greatly reduced by realizing direct current transmission, so that a compensation deviceand a booster station do not need to be arranged on a wind power transmission and transformation line, and the cost of a wind power plant project is reduced. Furthermore, the frequency of the wind power generation boosting transformer is improved through the modes that high-voltage coils are formed by winding multiple strands of wires in parallel, iron cores are made of high-permeability magneticmaterials and the like, so that the cost of the wind power generation system is further reduced. The invention further discloses a power transformation system for wind power direct-current power transmission and transformation, which has the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation, in particular to a step-up transformer for wind power generation and a power transformation system for wind power direct current transmission and transformation. Background technique [0002] Wind power transmission and transformation is an important part of wind farm engineering. The outlet voltage of the wind power generator is 690V, which is a low-voltage power supply. In order to reduce the loss of the connection line in the wind farm, the high-voltage collector line in the field is uniformly sent to the booster station, and the booster transformer boosts the 690V voltage at the outlet end of the wind turbine to 10kV or 35kV. [0003] In the existing wind power transmission and transformation occasions, AC transmission is adopted. However, because wind power generators are often located on relatively open land or sea, the transmission cables are long, and the l...

AI Technical Summary

Problems solved by technology

However, since wind power generators are often located on relatively open land or sea, the transmission cables are long, and the loss of AC power during long-distance transmission is large, so that the wind farm project needs to invest a lot of cost, such as setting up a booster station to reduce AC power. The loss in the transmission process makes it difficult to reduce the cost of wind power, which is not conducive to the gradual realization of grid parity for wind power projects

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