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Wind turbine generator set with energy storage device and connecting method

A technology of energy storage devices and wind turbines, which is applied in the direction of wind power storage, wind power generation, energy storage, etc., can solve the problems of affecting the total efficiency of the system, reducing the power generation efficiency of the system, and poor fault tolerance of the system, so as to improve fault tolerance performance, improve overall efficiency, and maintain the effect of normal work

Pending Publication Date: 2022-05-20
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, when the energy storage device stores and discharges energy, the electric energy needs to go through the two-stage conversion link of AC-DC and DC-DC, which will affect the overall efficiency of the system and reduce the power generation efficiency of the system. When the grid-side converter / grid-side converter or the DC-to-grid AC link fails, the wind turbine will not work normally, and the fault tolerance of the system is not good

Method used

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  • Wind turbine generator set with energy storage device and connecting method
  • Wind turbine generator set with energy storage device and connecting method
  • Wind turbine generator set with energy storage device and connecting method

Examples

Experimental program
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Embodiment 1

[0025] Such as figure 2 As shown, the wind turbine with energy storage device in this embodiment includes a converter device 1 and an energy storage device 2, the DC link of the converter device 1 is connected to the DC link of the energy storage device 2, so that the DC link of the converter device 1 The link is directly transmitted to the DC link of the energy storage device 2.

[0026] By adopting the above structure, when the wind turbine generates electricity and needs to charge and store energy to the energy storage device 2, the DC link of the converter device 1 in the wind turbine is directly transmitted to the DC link of the energy storage device 2, and the electric energy generated by the wind turbine can be directly Provided to the DC link of the energy storage device 2 for storage, there is no need to go through the two-stage conversion link of DC to AC and then AC to DC as in the traditional connection method, so two power electronic conversion links are reduced,...

Embodiment 2

[0038] Such as figure 2As shown, this embodiment is basically the same as Embodiment 1, except that the energy storage device 2 includes a first conversion unit 21 for converting DC power into AC power, and the DC link of the converter device 1 is connected to the first conversion unit The DC end of 21, that is, the energy storage device 2 only contains a DC-to-AC conversion unit and does not contain a DC-to-DC conversion link, so it can be applied to energy storage devices that do not contain a DC-to-DC conversion link, and can greatly improve the energy storage device. 2 System power generation efficiency during charging and energy storage.

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Abstract

The invention discloses a wind turbine generator set with an energy storage device and a connection method, the wind turbine generator set comprises a converter device and the energy storage device, and a direct current link of the converter device is connected to a direct current link of the energy storage device, so that the direct current link of the converter device is directly conducted to the direct current link of the energy storage device. The system has the advantages of simple structure, low cost, high efficiency, strong fault tolerance and the like.

Description

technical field [0001] The invention relates to the technical field of wind power generation systems, in particular to a wind turbine with an energy storage device and a connection method. Background technique [0002] Adding an energy storage device to the wind farm can store part of the electrical energy generated by the wind turbine, and when necessary, the energy storage device can be discharged to provide supplementary electrical energy. In some micro-grids / weak grids or units that require independent operation, energy storage devices must be configured so that wind turbines can operate stably and reliably. Therefore, in order to deal with problems such as grid insecurity due to the increasing proportion of wind power in the grid, and to make up for the uncontrollable peak and valley of the output power of wind turbines affected by wind speed, wind turbines usually need to be equipped with appropriate energy storage devices. In some areas, a certain scale of energy sto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32H02J3/36F03D9/11
CPCH02J3/38H02J3/32H02J3/36F03D9/11H02J2300/28Y02E10/72Y02E70/30
Inventor 赵燕峰万宇宾王丽广臧晓笛胡婵娟袁莹喻秋敏唐益文陈世超李旺成
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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