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Hybrid energy storage system for smoothing wind power fluctuations

A hybrid energy storage system and wind power technology, which is used in electrical energy storage systems, electric vehicles, current collectors, etc., can solve problems such as complex structures, optimize working conditions, avoid frequent actions and charging and discharging, and reduce state of charge fluctuations. Effect

Active Publication Date: 2020-02-07
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a wind power generation energy storage system that solves complex structural problems and optimizes the working state of the energy storage system

Method used

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  • Hybrid energy storage system for smoothing wind power fluctuations
  • Hybrid energy storage system for smoothing wind power fluctuations
  • Hybrid energy storage system for smoothing wind power fluctuations

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Effect test

Embodiment 1

[0042] In this embodiment, a wind power generating set with a rated power of 10 MW is set, and the hybrid energy storage system of the present invention is used to compensate power fluctuations. The hybrid energy storage system includes supercapacitors, batteries, hysteresis comparator controllers and limit management modules, as attached figure 1 shown. Among them, the supercapacitor and the battery are connected in series (cascaded), the hysteresis comparison controller is connected with the supercapacitor and the battery respectively, and the limit management module is connected with the supercapacitor and the battery respectively; the hybrid energy storage system is based on Kirchhoff’s current law (KCL Law) is integrated into the grid, and the target power curve that the hybrid energy storage system needs to compensate is shown in the attached Figure 4 shown. Set the initial state of charge of the hybrid energy storage system to 50% to exert its optimal performance.

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Embodiment 2

[0077] In this embodiment, a wind power generating set with a rated power of 10 MW is set, and the hybrid energy storage system of the present invention is used to compensate power fluctuations. The hybrid energy storage system includes supercapacitors, batteries, hysteresis comparator controllers and limit management modules, as attached figure 1 shown. Among them, the supercapacitor and the battery are connected in series (cascaded), the hysteresis comparison controller is connected with the supercapacitor and the battery respectively, and the limit management module is connected with the supercapacitor and the battery respectively; the hybrid energy storage system is based on Kirchhoff’s current law (KCL Law) is integrated into the grid, and the target power curve that the hybrid energy storage system needs to compensate is shown in the attached Figure 4 shown. Set the initial state of charge of the hybrid energy storage system to 50% to exert its optimal performance.

...

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Abstract

The invention discloses a hybrid energy storage system for stabilizing a wind power fluctuation. The hybrid energy storage system aims at solving the problems of complicated structure and working state optimization of an energy storage system in the prior art. The hybrid energy storage system comprises a supercapacitor, a storage battery and a hysteresis comparison controller, wherein the supercapacitor and the storage battery are cascaded; and the hysteresis comparison controller is connected with the supercapacitor and the storage battery, and provided with a first threshold, a second threshold, a third threshold and a fourth threshold which are ascended and correspond to the dump energy of the supercapacitor. Therefore, frequent action, charging and discharging of the storage battery can be effectively avoided; the service life is prolonged; a charge state fluctuation of the supercapacitor is reduced; the whole economy of the hybrid energy storage system is improved; and a working state of the energy storage system is optimized. The hybrid energy storage system is applicable to research, development, design, operation control, electric energy measurement, expense management and the like of a wind power generation system, has the characteristics of simple structure, good stability, environmental protection and reproducibility, and has a high industry-university-research value.

Description

technical field [0001] The invention relates to a wind power generation energy storage system, in particular to a hybrid energy storage system for smoothing wind power fluctuations. Background technique [0002] With the depletion of traditional energy sources, renewable new energy generation technologies such as wind power generation have gradually attracted people's attention. Due to the intermittent and random characteristics of wind energy, the output power of the wind power system is in a fluctuating and unstable state. When the output power of wind power is directly integrated into the grid, it will have a negative impact on the stability of the power system, grid frequency, power quality, power generation planning and dispatching, etc. Therefore, it is of great practical significance to use energy storage system (ESS) to stabilize the output power fluctuation of wind farms. Different energy storage devices have different characteristics and applicable occasions, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02J15/00
CPCH02J7/00H02J15/00Y02E70/30
Inventor 刘浩姜春阳魏胜清刘鹍周一飞周峰殷小东刘俊杰
Owner CHINA ELECTRIC POWER RES INST
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