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A new type of power supply method for large island operation mode of offshore wind farm

A technology of operation mode and power supply method, applied in wind power generation, electrical components, circuit devices, etc., to achieve the effect of improving efficiency and success rate, improving stability and reliability, and avoiding large investment

Active Publication Date: 2022-02-15
SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method aims to solve the self-consumption problem of the offshore wind farm and the offshore booster station when the offshore wind farm loses the support of the large power grid. The wind turbine is used as the main power supply in the large island operation mode, and the supporting energy storage device is configured to adjust the power supply. The power balance during the period ensures the stability and reliability of the power supply of the offshore wind farm and reduces the construction cost of the wind farm

Method used

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  • A new type of power supply method for large island operation mode of offshore wind farm
  • A new type of power supply method for large island operation mode of offshore wind farm
  • A new type of power supply method for large island operation mode of offshore wind farm

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Embodiment Construction

[0038] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.

[0039] Such as figure 1 As shown, the offshore wind farm includes a 110KV offshore step-up station 1 and a 35KV collector line; the collector line is equipped with an energy storage device 2 and several 7MW direct-drive wind turbines.

[0040] When the offshore wind farm encounters a typhoon warning or other situations that may lead to a power outage of the large power grid, if the wind farm is not separated from the large power grid, the offshore wind farm will perform shutdown operations; if it is disconnected from the large power grid, the wind farm will lose the support of the large power grid. Then the offshore wind farm enters the large island operation mode.

[0041] The invention provides...

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Abstract

The invention discloses a new type of power supply method for a large island operation mode of an offshore wind farm, which includes the following steps: Step 1: The offshore wind farm enters the large island operation mode, the offshore booster station adjusts the energy storage device, and turns on the black start, so that the start-up is at least One fan unit is used as the power supply unit; Step 2: Other fan units and offshore booster stations other than the power supply unit send the total power required to the power supply unit, and the power supply unit outputs the power supply output power according to the total power demand; Step 3: The energy storage device The power supply output power is adjusted to output the final power supply; Step 4: The final power supply is transmitted to other fan units and offshore booster stations to complete the power supply in the large island operation mode. This invention solves the problem of self-consumption electricity without the support of the large power grid. The wind turbine is used as the main power supply for power supply, and the energy storage device is configured to adjust the power balance, ensuring the stability and reliability of the power supply and reducing the construction cost of the wind farm.

Description

technical field [0001] The invention relates to the technical field of wind power supply, in particular to a novel power supply method for a large island operation mode of an offshore wind farm. Background technique [0002] The electric energy generated by the wind farm needs to be transmitted to the infinite power grid, and it also needs the support of the large power grid for the self-consumption of the wind farm. Due to special circumstances (such as typhoon and other extreme weather conditions, line maintenance and overhaul, etc.), offshore wind farms will lose the support of the large power grid when they are disconnected from the power grid. In the case of losing the support of the large power grid, since going out to sea is greatly affected by the weather (for example, going out to sea is prohibited during a typhoon), and the overhaul and maintenance cycle of the offshore wind farm is long, the wind turbines lose power for a long time and cannot yaw against the wind,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/28H02J11/00
CPCH02J3/388H02J3/381H02J3/28H02J3/466H02J11/00H02J2300/28Y02E10/76
Inventor 巩源泉黄轩王莉娟
Owner SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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