Design method of flywheel energy-storage energy management system for improving wind power integration power quality

Abstract

The invention relates to a design method of a flywheel energy-storage energy management system for improving the wind power integration power quality. The method is characterized in that, along with the remarkably increasing process of the wind power permeability, the cluster wind power integration greatly influences the power quality of a power system, especially the voltage quality of the power system. The flywheel energy storage has active and reactive independent-adjustment capabilities. According to the technical scheme of the invention, an energy management optimized model applied to a flywheel energy storage system for improving the power quality of the power system is designed. The model is designed based on a double-layer decision-making model. In order to improve the power quality, a superstratum solves out the charging and discharging power of an energy storage device according to the state of the energy storage device and the fluctuation quantity of the wind power based on the fuzzy algorithm. Meanwhile, a substratum designs a substratum control scheme of the energy storage system according to the mathematic model of the flywheel energy storage system. based on the above model, the wind power and the energy storage are cooperated to improve the utilization efficiency of the energy storage device, so that the wind power integration power quality is improved. Specifically, the method is scientific, reasonable, high in applicability and good in effect.

Description

technical field [0001] The invention relates to the field of electric power technology, and relates to a design method of a flywheel energy storage energy management system for improving the quality of wind power grid-connected power. Background technique [0002] With the rapid growth of wind power installed capacity, my country has formed eight 10 million-kilowatt wind power bases. The strong fluctuation and uncertainty of wind power make large-scale wind power collection areas present typical characteristics of high wind power penetration and weak local power grids. In the case of high-penetration wind power access, changes in wind power will further lead to a surge or sudden drop in grid voltage, which will inevitably cause a series of voltage quality problems, and may even exceed the relevant national standards. Therefore, ensuring the quality of wind power grid-connected voltage, enhancing the grid-friendliness of wind power power, and increasing the scale of wind powe...

AI Technical Summary

Problems solved by technology

[0003] It is difficult for traditional power generation adjustment methods to fully meet the requirements for dynamic support of the power grid. The energy storage system has a fast power response capability and can realize two-way power adjustment.

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