Main wiring system for offshore wind power plant flexible direct current power transmission system

Abstract

The invention provides a main wiring system for an offshore wind power plant flexible direct current power transmission system. The main wiring system for an offshore wind power plant flexible direct current power transmission system includes an offshore booster station, a pelagic converter station and an offshore converter station, wherein the offshore booster station is used for improving the alternating current voltage grade, and transmitting the alternating current voltage to the pelagic converter station; the pelagic converter station is used for rectifying the alternating current voltage transmitted from the offshore booster station into direct current voltage, and transmitting the direct current voltage to the offshore converter station; and the offshore converter station inverts the direct current voltage transmitted from the pelagic converter station into alternating current voltage, and transmitting the alternating current voltage to an offshore sub transformer station. The technical scheme provided by the main wiring system for an offshore wind power plant flexible direct current power transmission system improves the safety and stability of an offshore alternating current power grid, provides enough quick dynamic reactive compensation for the wind power plant, reduces the off-net risk of a blower fan and improves the utilization rate of wind energy. The technical scheme provided by the main wiring system for an offshore wind power plant flexible direct current power transmission system can be applied to large scale construction of pelagic offshore wind power direct current grid connected standard system, can promote design of direct current grid connected system, type selecting and standardization of equipment, and can reduce the cost of programming, construction and operation and the investment for research and development of equipment.

Description

technical field [0001] The invention relates to the field of flexible direct current transmission, in particular to a main wiring system of an offshore wind farm flexible direct current transmission system. Background technique [0002] Flexible DC transmission is a new type of power transmission technology based on fully controlled turn-off semiconductor devices (IGBTs), and it is also the most controllable and best adaptable power transmission technology in the world. Flexible DC transmission can realize fault isolation, autonomously control voltage and frequency, quickly and independently control the transmitted active and reactive power and provide dynamic voltage support. At the same time, it can improve the safety and stability of the AC grid, without strong system support, and reduce multi-feeding of load centers into the risk of DC cascading failures. With the development and application of multi-terminal flexible DC transmission technology, the interconnection of w...

AI Technical Summary

Problems solved by technology

[0003] At present, in the conversion process of rectification and inverter, the voltage level is not high enough, the energy loss is large in the transmission process, and the efficiency is very low, and the safety and stability are low, and the utilization rate of wind energy is not high.

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