Offshore wind power transmission system

Abstract

The invention provides an offshore wind power transmission system, and the system comprises: a wind driven generator tower drum, which is disposed in the sea; a wind driven generator main machine, which is arranged on the wind driven generator tower drum; a wind driven generator boosting transformer, which is electrically connected with the wind driven generator main machine; a first alternating-current line, which is electrically connected to the wind driven generator tower drum; a current collection platform, which is electrically connected with the wind driven generator boosting transformer through the first alternating-current line; a second alternating-current line, which is electrically connected to the current collection platform; and a land transformer, which is electrically connected with the current collection platform through the second alternating-current line, wherein the first alternating-current line and / or the second alternating-current line completely or partially adopt three-phase alternating-current overhead lines. According to the technical scheme of the invention, a three-phase alternating-current overhead line mode is adopted, so that the problem of capacitive current caused by submarine cables is avoided, and reactive compensation equipment at the two ends of the sea and the land is omitted. The current collection platform and the fan are integrally designed, fan facilities are utilized to the maximum extent, offshore platform investment is saved, and the system is more environmentally friendly.

Description

technical field [0001] The present application relates to the technical field of electric power system transmission, in particular to an offshore wind power transmission system. Background technique [0002] At present, the electric energy of offshore wind farms is mainly sent to inland through two transmission methods, one is high-voltage AC submarine cable transmission, and the other is flexible DC transmission. The latter is mainly used in offshore wind farms, while the former is mainly used in offshore wind farms. High-voltage AC submarine cable transmission has the advantages of mature technology and good economy, but because the distributed capacitance of the cable line is much larger than that of the overhead line, the capacitive current generated will significantly reduce the transmission capacity of the cable, and as the transmission distance increases, its transmission The ability drops rapidly. In the process of realizing the present invention, the inventor consi...

AI Technical Summary

Problems solved by technology

High-voltage AC submarine cable transmission has the advantages of mature technology and good economy, but because the distributed capacitance of the cable line is much larger than that of the overhead line, the capacitive current generated will significantly reduce the transmission capacity of the cable, and as the transmission distance increases, its transmission The ability drops rapidly. In the process of realizing the present invention, the inventor considered that the application of high-voltage AC submarine cable transmission needs to use huge reactive power compensation equipment to make up for it. Construction costs of offshore platforms

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