Central-control-system-based energy storage type wind power plant

Abstract

The invention relates to the technical field of control over wind power plants with energy storage systems, and discloses a central-control-system-based energy storage type wind power plant. The energy storage system is added on the basis of the conventional wind power plant. A central control system integrates the monitoring of an energy storage battery system, an energy conversion system, fans of the whole plant, a booster station and box type transformers of the whole plant. A power grid scheduling interface is arranged to realize totally integrated control over the energy storage type wind power plant. A central control system platform realizes a power prediction function, an energy management function, a power grid direct scheduling function and an entire-wind power plant low-voltage ride through function. A problem about the grid connection of conventional wind power generation is solved, the quality of grid-connected electric energy of the wind power generation is improved, and the real-time performance, accuracy and safety of the control over the energy storage type wind power plant are improved.

Description

technical field [0001] The invention belongs to the field of electric energy conversion technology and power electronics technology, belongs to the field of wind farm control, and in particular relates to a control device of an energy storage type wind farm. Background technique [0002] The inherent randomness and intermittent characteristics of wind energy and other new energy power generation determine that it belongs to electric energy with low energy density, poor stability, and poor regulation ability. It will adversely affect the safety, stability, economic operation of the power grid and the quality of power supply of the power grid. When the wind power generation capacity accounts for more than a certain proportion of the grid capacity, it will have a significant impact on the local grid. The grid access problem of wind power has become a bottleneck restricting the development of the wind power industry, mainly manifested in the following three aspects: [0003] (...

AI Technical Summary

Problems solved by technology

[0003] (1) The randomness and uncontrollability of wind power bring new challenges to power system planning and stable operation;

[0004] (2) The fluctuation characteristics of wind power and grid load are difficult to be consistent, which makes the peak regulation problem of the power grid more prominent, and puts forward higher requirements for peak regulation capacity and response speed;

[0005] (3) Due to changes in wind speed, wind turbines are likely to cause grid voltage and power fluctuations, and the resulting reactive voltage control and power quality problems

However, its composition is more complicated than that of traditional wind farms, and the existence of energy storage systems puts forward higher requirements for real-time control, accuracy, and safety.

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