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Composite energy storage control system and control method for wind farm power generation plan tracking

A composite energy storage and power generation planning technology, applied in the field of composite energy storage systems, can solve problems such as the lack of research results, and achieve the effect of prolonging the effect of wind power regulation, improving the friendliness of the power grid, and improving the accuracy

Active Publication Date: 2018-08-17
ANHUI POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, research on the application of composite energy storage in wind power regulation mainly focuses on suppressing wind power fluctuations, but there are not many research results on improving the tracking ability of wind farm power generation plans.

Method used

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  • Composite energy storage control system and control method for wind farm power generation plan tracking
  • Composite energy storage control system and control method for wind farm power generation plan tracking
  • Composite energy storage control system and control method for wind farm power generation plan tracking

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Embodiment Construction

[0068] Such as figure 1 As shown, in the composite energy storage control system used to track the power generation plan of wind farm 1, the composite energy storage power station 2 and wind farm 1 are connected in parallel on the AC bus 6 at the outlet of wind farm 1, and are connected to the AC grid through a step-up transformer 7.

[0069] The composite energy storage power station 2 includes battery energy storage 8 and flywheel energy storage 9, the battery energy storage 8 passes through the battery energy storage DC / DC bidirectional converter 10, the flywheel energy storage 9 passes through the flywheel energy storage AC / DC bidirectional converter 11, and is connected in parallel on the same DC bus; the DC bus is then connected to the AC bus 6 at the outlet of the wind farm 1 through a grid-connected AC / DC bidirectional converter 12 .

[0070] The composite energy storage controller 3 includes a battery optimization controller and a flywheel energy storage controller 5,...

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Abstract

The invention discloses a composite energy storage control system used for wind power plant power generation plan tracking. A composite energy storage power station is connected in parallel on the AC bus of a wind power plant. Battery energy storage of the composite energy storage power station is connected with a grid-connected AC / DC bidirectional converter through a battery energy storage DC / DC bidirectional converter. Flywheel energy storage of the composite energy storage power station is connected with the grid-connected AC / DC bidirectional converter through a flywheel energy storage AC / DC bidirectional converter. The grid-connected AC / DC bidirectional converter is connected with a convergence bus. The battery energy storage DC / DC bidirectional converter receives the control signal of a battery energy storage optimization controller. The flywheel energy storage AC / DC bidirectional converter receives the control signal of a flywheel energy storage controller. The composite energy storage system formed by battery energy storage and flywheel energy storage is utilized, and the composite energy storage optimization control system capable of effectively enhancing the wind power plant power generation plan tracking capacity and then reducing the adverse influence of wind power integration on the grid frequency stability can be realized under the condition of fully considering the wind power characteristics and the composite energy storage system characteristics.

Description

technical field [0001] The invention relates to the technical field of energy storage used in electric power systems, in particular to a composite energy storage system for power regulation of grid-connected wind farms. Background technique [0002] Affected by geographical environment, weather and other factors, wind power output presents strong fluctuations and uncertainties, and high-penetration wind power grid integration poses a huge challenge to the safe and stable operation of the power system. In order to reduce the pressure of wind power access on power grid frequency regulation / peak regulation, power companies not only stipulate the maximum fluctuating power of wind farms at different time scales, but also require them to have online active power regulation capabilities and be able to automatically perform scheduling The power generation plan issued by the organization ensures that the power generation is within the allowable deviation range. Therefore, it is of g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J3/28H02J3/38
CPCH02J3/28H02J3/32H02J3/386Y02E10/76Y02E70/30
Inventor 刘世林禹威威江明陈其工
Owner ANHUI POLYTECHNIC UNIV
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