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Double-layer coordination control method for stabilizing wind power fluctuation of hybrid energy storage system

A technology for hybrid energy storage systems and wind power fluctuations, applied in wind power generation, electric vehicles, reducing/preventing power oscillations, etc., can solve problems such as overcharging and overdischarging, inability to complete stabilization tasks, and limited SOC of energy storage equipment , to achieve the effect of prolonging the service life, improving the utilization rate of equipment, and reducing the number of times of deep charging and deep discharging

Active Publication Date: 2021-09-21
NANJING INST OF TECH
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AI Technical Summary

Problems solved by technology

Due to the limited capacity of the energy storage system, it may cause the SOC of the energy storage device to be limited or overcharge and overdischarge when stabilizing the fluctuation of wind power output power, thus failing to complete the stabilization task.

Method used

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  • Double-layer coordination control method for stabilizing wind power fluctuation of hybrid energy storage system
  • Double-layer coordination control method for stabilizing wind power fluctuation of hybrid energy storage system
  • Double-layer coordination control method for stabilizing wind power fluctuation of hybrid energy storage system

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Embodiment Construction

[0042] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Aiming at the hybrid energy storage system composed of batteries and supercapacitors, the present invention proposes a double-layer coordinated control method for the hybrid energy storage system to stabilize wind power fluctuations, which will improve the crowd search algorithm, support vector regression machine, W-M filter method, and self-adaptive water injection algorithm Combined with the SH optimization algorithm, the two-layer coordinated control of HESS can reduce the number of deep charging and deep discharging of hybrid energy storage equipment, improve equipment utilization, prolong service life, and have good economic benefits.

[0044] The two-layer coordinated control method for the hybrid energy storage system to stabilize wind power fluctuations includes the following steps:

[0045] (1) Prediction by Supp...

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Abstract

The invention discloses a double-layer coordination control method for stabilizing wind power fluctuation of a hybrid energy storage system. The method comprises the following steps of (1) predicting short-term wind power through support vector machine regression, and optimizing penalty factor parameters through a crowd search optimization algorithm in a support vector machine regression prediction process; (2) taking the stabilized wind power as grid-connected reference power based on a W-M filtering method, calculating HESS reference output power, and performing primary power distribution on a supercapacitor and a storage battery by adopting improved Hilbert-Huang transform to obtain respective reference compensation power; (3) dividing the working areas of the supercapacitor and the storage battery by the system through a power optimization layer, and performing coordination control on the charge-discharge power and the SOC of the HESS by adopting a self-adaptive water injection algorithm to obtain expected compensation power; and (4) obtaining a final power set value by using an SH optimization algorithm by using an opportunity-constrained programming method with minimization as a target and maximum and minimum charging and discharging power values as constraints through a power implementation layer.

Description

technical field [0001] The invention relates to a control method of a hybrid energy storage system, in particular to a two-layer coordinated control method for the hybrid energy storage system to stabilize wind power fluctuations. Background technique [0002] As a clean and renewable energy with abundant reserves, wind energy is an effective way to solve the current energy crisis and environmental degradation. Wind power generation technology has attracted more and more attention from all over the world. Wind energy has strong random fluctuations, and the direct connection of wind power to the grid will have a negative impact on the safe and stable operation of the power system, and even cause grid collapse. With the increasing maturity of large-scale energy storage technology, installing a certain-capacity energy storage system in wind farms is an effective means to solve the problem of wind power grid-connected fluctuations. It is difficult for a single type of energy st...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/28H02J3/32H02J3/38H02J7/00H02J7/34G06F17/11G06F17/14G06N3/00
CPCH02J3/24H02J3/28H02J3/32H02J3/381H02J3/002H02J7/345H02J7/0068H02J7/00302H02J7/00306G06F17/14G06F17/11G06N3/006H02J2300/28H02J2203/10H02J2203/20Y02E70/30Y02E10/76
Inventor 吴瑶孟高军孙玉坤刘海涛周煜余昊晨陈霜
Owner NANJING INST OF TECH
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