Marine wind power direct current collecting power transmission system and design method

Abstract

The invention discloses a marine wind power direct current collecting power transmission system and a design method. The marine wind power direct current collecting power transmission system comprises a wind farm inner electric energy collecting module, a wind farm direct current boost module, a high voltage direct current collecting and transmission module, and a land converter station grid-connected module, wherein the wind farm inner electric energy collecting module comprises a plurality of wind power generators and AC-DC rectifiers, each wind power generator converts wind energy to three-phase alternating current electric energy, the electric energy is converted to direct current electric energy via the AC-DC rectifiers, the wind farm direct current boost module comprises a plurality of DC-DC topology structures, the energy of fans in the wind farm is collected to a direct current boost station via direct current and boosted via DC-DC converters, the high voltage direct current collecting and transmission module is used for collecting high voltage direct current electric energy outputted by each wind farm, transmitting the energy to the land via a common submarine cable, and performing grid connection via a high-capacity converter station, and the land converter station grid-connected module comprises a grid-connected converter station arranged at the land side and a direct current power transmission converter station.

Description

technical field [0001] The invention relates to an offshore wind power DC convergence transmission system and a design method. Background technique [0002] With the increasing capacity of wind power generation, more and more wind power generation is connected to the grid, and the grid-connected operation of wind power has become the most effective way to utilize wind energy on a large scale. Because offshore wind farms have many advantages such as abundant wind energy resources, stable wind speed, less impact on the environment, and being far away from public living areas. Now large-scale wind farms are shifting from land to sea. Offshore wind farms have incomparable advantages over onshore wind farms. It has become a development trend of wind power to build wind farms in distant seas where wind energy resources are more abundant. [0003] There are mainly three types of grid connection methods for offshore wind power generation: high-voltage AC transmission, high-voltage...

AI Technical Summary

Problems solved by technology

This transmission method requires the use of a low-frequency transformer with a large volume and weight, which not only increases the transportation cost and installation difficulty, but also increases the system loss and affects the system capacity utilization.

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