Novel deep and far sea wind power transmission system based on medium-low-power frequency collection

Abstract

The invention discloses a novel deep and far sea wind power transmission system based on medium-low-power frequency collection. The novel deep and far sea wind power transmission system comprises a plurality of wind turbine generators, a plurality of confluence boosting transformers, a medium-frequency confluence bus, an offshore boosting frequency conversion station, a submarine cable, an onshore frequency conversion grid-connected station and an onshore power frequency power grid. According to the invention, the reactance of the power transmission line is reduced, the transmission capacity of the line is improved, and direct current equipment with high construction and maintenance cost is not included. In addition, a low-frequency or industrial-frequency transformer is replaced by the medium-frequency transformer with smaller volume and cost on the sea so that remarkable advantages are achieved. According to the invention, the optimal design of each link is realized, the main defects of the traditional scheme are solved in a targeted manner, and the system has a relatively high practical application value and a relatively good future development prospect.

Description

technical field [0001] The invention belongs to the technical field of wind power transmission, and in particular relates to a new deep-sea wind power transmission system based on the integration of medium-low-power frequency. Background technique [0002] In recent years, the problems of energy depletion and environmental pollution have become increasingly severe, while new energy power generation has the characteristics of pollution-free and sustainable, and its application prospects are extremely broad. Wind power generation is one of the most mature and most development-scale power generation methods in new energy power generation technologies. With the development and application of wind power technology, the scale of wind farms is becoming larger and larger. Due to the constraints of land resources and wind energy resources, large-scale wind farms are mostly located in remote areas far away from power nodes or on the sea. At present, the development of onshore wind p...

AI Technical Summary

Problems solved by technology

However, the volume and cost of the transformer on the low frequency side of FFTS will increase, and its weight is at least twice that of the power frequency transformer. Some studies have shown that the cost of the transformer will increase by about 70%.

In addition, as the key component of the FFTS system, the frequency converter has difficulties and deficiencies in the application of both the thyristor-based frequency converter and the fully-controlled device-based frequency converter.

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