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Energy storage configuration method for output fluctuation of smooth grid-connected wind-solar power generation system

A technology of wind power generation and configuration method, which is applied in the direction of AC network load balancing, etc.

Active Publication Date: 2013-12-25
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0002] Renewable energy represented by wind power and photovoltaic power generation has the characteristics of intermittency, randomness and uncertainty; as the penetration rate of renewable energy continues to increase, it brings more and more challenges to the safe and reliable operation of the power grid

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  • Energy storage configuration method for output fluctuation of smooth grid-connected wind-solar power generation system
  • Energy storage configuration method for output fluctuation of smooth grid-connected wind-solar power generation system
  • Energy storage configuration method for output fluctuation of smooth grid-connected wind-solar power generation system

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Embodiment Construction

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0035] figure 1 A flow chart of an energy storage configuration method for smoothing output fluctuations of a grid-connected wind power generation system in an embodiment of the present invention is shown; the specific steps are:

[0036] Step 1. The monitoring system sampling or forecasting department must obtain the historical power data or predicted power data P(n) of the grid-connected wind power generation system output that needs to be smooth; if the maximum power fluctuation of the power data P(n) and maximum power volatility If the constraint condition of the output fluctuation of the grid-connected wind power generation system is satisfied, no energy storage configuration is performed, and if it is not satisfied, step 2 is performed; the constraint condition incl...

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Abstract

The invention provides an energy storage configuration method for output fluctuations of a smooth grid-connected wind-solar power generation system. The method includes the steps of firstly, obtaining power data P(n) output by the grid-connected wind-solar power generation system, and judging whether the maximum power fluctuation quantity of the power data P(n) and the maximum power fluctuation ratio of the power data P(n) meet the restraint condition of the grid-connected fluctuations of the grid-connected wind-solar power generation system or not; secondly, obtaining the frequency range [omega L, omega H] of the power data P(n) after the discrete fourier transformation is conducted on the power data P(n), and determining the compensation frequency omega c through the frequency testing method and the low-pass filtering; thirdly, determining an energy storage capacity EN and an energy storage initial charge state SOC0. Compared with the prior art, the energy storage configuration method for output the fluctuations of the smooth grid-connected wind-solar power generation system is reliable and easy to achieve, and effectively solves the problem of the grid-connected fluctuations of a renewable energy source power generation system.

Description

technical field [0001] The invention relates to an energy storage configuration method, in particular to an energy storage configuration method for smoothing output fluctuations of a grid-connected wind and solar power generation system. Background technique [0002] Renewable energy represented by wind power and photovoltaic power generation has the characteristics of intermittency, randomness and uncertainty; as the penetration rate of renewable energy continues to increase, it brings more and more challenges to the safe and reliable operation of the power grid. The energy storage system (Energy Storage System, ESS) effectively solves the problem of fluctuations in the output of grid-connected wind and solar power generation systems by virtue of its rechargeable and dischargeable characteristics. [0003] When the energy storage system is used to smooth the fluctuation of the grid-connected wind and solar power generation system, the fluctuation rate of wind power and phot...

Claims

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Application Information

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IPC IPC(8): H02J3/32
Inventor 桑丙玉王德顺李官军杨波郑高吴福保陶以彬俞斌胡金行陈彬
Owner STATE GRID CORP OF CHINA
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