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Method and system for causing energy storage power station to smooth wind and photovoltaic power generation fluctuation based on change rate

A technology for wind and solar power generation and energy storage power stations, which is applied in the field of real-time battery power calculation and smooth control of wind and solar power output, to achieve the effects of suppressing output fluctuations, prolonging service life, and reducing utilization rates

Active Publication Date: 2014-02-05
CHINA ELECTRIC POWER RES INST +1
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are very few patents, documents, and technical reports on the smooth control of wind power generation output based on megawatt-scale high-power and large-capacity battery energy storage power stations, and in-depth research and exploration are needed

Method used

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  • Method and system for causing energy storage power station to smooth wind and photovoltaic power generation fluctuation based on change rate
  • Method and system for causing energy storage power station to smooth wind and photovoltaic power generation fluctuation based on change rate
  • Method and system for causing energy storage power station to smooth wind and photovoltaic power generation fluctuation based on change rate

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. In this example, a lithium-ion battery energy storage power station is taken as an example for illustration.

[0043] Such as figure 1 As shown, the wind-storage-storage combined power generation system includes a wind farm (short for wind farm and photovoltaic farm), a battery energy storage power station, and a power grid; the wind farm, photovoltaic farm, and battery energy storage power station are connected to the grid through transformers . There are multiple wind turbines in the wind farm, and each wind turbine is connected to the transformer through a converter; there are multiple photovoltaic generators in the photovoltaic farm, and each photovoltaic generator is connected to the transformer through a converter. It is connected with the transformer; the wind power generating set and the photovoltaic generating set adopt the g...

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Abstract

The invention relates to a method and a system for causing an energy storage power station to smooth wind and photovoltaic power generation fluctuation based on a change rate. The method comprises the following steps: A reading data and perform storage and management on the data; B determining the change rate of a dynamic slope limiter limit signal based on the operating state and the rated power of a wind driven generator and a photovoltaic generator; C calculating a wind and photovoltaic power generation total power smooth target value; D calculating the battery energy storage power station total power requirement based on the photovoltaic power generation total power smooth target value; E and outputting the data. The system comprises a communication module, a data storage and management module, a change rate limit calculation module, a dynamic slope limiter module, a power distribution controller module and the like. According to the invention, the wind and photovoltaic power generation fluctuation ratio can be effectively restrained below a fluctuation ratio limit value, and the wind and photovoltaic power generation output can be effectively smoothed, so that the using burden of an energy storage battery can be effectively reduced and a battery energy storage power station system is controlled conveniently and flexibly while smoothing the wind and photovoltaic power generation output.

Description

technical field [0001] The invention belongs to the technical field of smart grid and energy storage and conversion, and specifically relates to a method for smoothing wind power generation output based on a high-power and large-capacity energy storage system, which is suitable for wind power generation output smoothing and mega Real-time battery power calculation method for watt-level energy storage power station. Background technique [0002] Due to the uncertainty and instability of wind power and photovoltaic power generation, the instantaneous rise or fall of wind power generation power will cause the output power to be unstable, making the grid-connected power of wind power and photovoltaic power generation fluctuate continuously. Moreover, as the proportion of wind power and photovoltaic power generation in the grid continues to increase, the smooth control of wind power and solar power output power has attracted more and more attention. [0003] With the continuous ...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCY02E70/30Y02E10/566Y02E10/56
Inventor 李相俊惠东来小康
Owner CHINA ELECTRIC POWER RES INST
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