An energy management method and system for cascaded battery energy storage power stations based on set empirical mode decomposition

A technology that integrates empirical modes and energy storage systems, applied in the field of new energy power generation control, can solve problems such as not considering multiple batteries

Inactive Publication Date: 2019-01-08
珠海吉瓦科技有限公司
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Problems solved by technology

[0005] Existing technical solutions for energy storage systems to stabilize wind power fluctuations do not consider how multiple batteries can make the wind po

Method used

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  • An energy management method and system for cascaded battery energy storage power stations based on set empirical mode decomposition
  • An energy management method and system for cascaded battery energy storage power stations based on set empirical mode decomposition
  • An energy management method and system for cascaded battery energy storage power stations based on set empirical mode decomposition

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Embodiment Construction

[0057]Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0058] attached figure 1 It is the energy management method and system flow chart of the cascade battery energy storage power station based on the set empirical mode decomposition of the present invention. As shown in the figure, the control system of the present invention mainly includes an EEMD frequency division controller and an energy storage controller. The control method is that the wind power is collected and entered into the EEMD frequency division controller, and the power curve is divided into high-frequency components and low-frequency components. Among them, the low-frequency component is used as a grid-connected signal, and the high-frequency component is used as an energy storage and absorption signal. After receiving the signal, the energy storage controller judges the charge and discharge, and then allocates the battery in detail.

[0059] A...

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Abstract

The invention provides an energy management method and a system of a cascade battery energy storage power station based on an empirical mode decomposition, which not only performs power leveling control on a microgrid system composed of a wind power system, a photovoltaic system and an energy storage system, but also prolongs the battery life and improves the energy efficiency of the energy storage system. This system mainly includes the Ensemble Empirical Mode Decomposition (EEMD) frequency division controller and energy storage controller. Adaptive order adjustment module and volatility calculation module are introduced into the EEMD frequency division controller, so that the wind-photovoltaic power curve is decomposed into low-frequency components which meet the requirements of grid-connection and high-frequency components which are absorbed by the energy storage system. The energy storage controller distributes the energy storage output power to the battery proportionally so that the state of charge of the battery tends to be uniform, thereby avoiding the overall capacity attenuation caused by the partial overcharge and overdischarge of the battery.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation control, and relates to an energy management method and system for cascaded battery energy storage power stations based on ensemble empirical mode decomposition. Background technique [0002] In recent years, energy storage systems have been used in new energy power stations such as solar and wind power to suppress power fluctuations and peak loads to fill valleys, which can improve the utilization efficiency of new energy power stations. However, the energy storage system is mainly composed of lithium batteries, and the cost of electricity storage High creates a lack of economy. With the popularity of electric vehicles in recent years, the reuse of a large number of retired electric vehicle batteries in the future is a big problem. There are two ways for power battery cascade utilization: dismantling recycled materials and reducing performance. The recycling value of lithium...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/382H02J3/32Y02E10/56Y02E10/76Y02E70/30
Inventor 刘格格黄沛明古雄文林俊豪
Owner 珠海吉瓦科技有限公司
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