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Starting method of offshore wind power direct current sending-out system

An offshore wind power and flexible DC technology, which is applied in wind power generation, power transmission AC network, output power conversion device, etc., can solve problems such as difficulty in starting the offshore wind power transmission system, and achieve the effect of improving reliability and stability

Active Publication Date: 2021-11-05
YANGJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a start-up method of an offshore wind power direct current transmission system to solve the problem of difficulty in starting the offshore wind power transmission system

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  • Starting method of offshore wind power direct current sending-out system
  • Starting method of offshore wind power direct current sending-out system

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] see figure 1 , figure 1 It is a topological schematic diagram of the offshore wind power transmission system provided by the present invention.

[0028] The embodiment of the present invention provides a method for starting an offshore wind power DC transmission system. The offshore wind power DC transmission system includes an offshore converter station and an onshore converter station. The offshore converter station includes an offshore flexible DC conver...

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Abstract

The invention provides a starting method of an offshore wind power direct current delivery system. The method comprises the following steps: firstly, charging an offshore flexible direct current converter valve and an onshore flexible direct current converter valve through a starting resistor of an onshore converter station, and then starting an offshore generator; enabling an energy consumption device of the onshore converter station to control the direct current side voltage to be preset voltage, unlocking the offshore flexible direct current converter valve, connecting the offshore flexible direct current converter valve into an offshore power generator, then starting fans of the offshore wind plant one by one based on the operation state of the offshore power generator, and when the method detects that the power of the fans is larger than the power consumed by the offshore converter station, stopping starting of the fans; then, enabling the offshore generator to quit operation, and meanwhile, switching the offshore flexible direct-current converter valve into an alternating-current voltage closed-loop control strategy; and finally, unlocking the offshore conventional direct current converter valve and the onshore flexible direct current converter valve. The starting method of the offshore wind power sending-out system can be provided, and the reliability and stability in the starting process are improved.

Description

technical field [0001] The invention relates to the technical field of offshore wind power direct current transmission, in particular to a method for starting an offshore wind power direct current transmission system. Background technique [0002] The common offshore wind power flexible DC transmission topology is a full-power flexible DC topology at both ends, which is a mature solution in the industry. Its offshore platform has a large volume and weight and high cost. [0003] In order to reduce the volume and weight of the offshore converter station, some scholars have proposed to replace the offshore flexible DC converter valve with a diode converter valve, but there is a need to transform the offshore wind turbine into a network-type control strategy, which is a challenge to the existing industrial system. A big change. The compromise solution is to use diode converter valves and flexible DC converter valves in series at sea, which does not need to change the control ...

Claims

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Application Information

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IPC IPC(8): H02M1/36H02J3/38H02J3/36
CPCH02M1/36H02J3/38H02J3/36H02J2300/28Y02E10/76Y02E60/60
Inventor 刘新苗邹常跃罗文博赵晓斌赵永发许树楷王训龙冯俊杰林理符卢毓欣许志昆杨双飞
Owner YANGJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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