Energy storage capacity optimization method of wind power farm based on min component fluctuation of wind power

A technology of wind power and energy storage capacity, which is applied in wind power generation, energy storage, and reduction of greenhouse gases, etc., and can solve problems such as decreased accuracy of wind power prediction and frequent fluctuations

Active Publication Date: 2013-08-21
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0006] Wind power includes continuous component and min-level component, among which the continuous component is relatively smooth and has high prediction accuracy, while the min-level component has small but frequent fluctuations, which reduces the accuracy of wind power forecasting

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  • Energy storage capacity optimization method of wind power farm based on min component fluctuation of wind power
  • Energy storage capacity optimization method of wind power farm based on min component fluctuation of wind power
  • Energy storage capacity optimization method of wind power farm based on min component fluctuation of wind power

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0061] 1 Analysis of fluctuation characteristics of wind power min-level components

[0062] Wind power includes continuous components and min-level components. Among them, the fluctuation period of the continuous component is long and the volatility is small, which has little impact on the power system and power prediction; while the fluctuation period of the min-level component is short and the volatility is large. If the grid-connected wind power capacity is large to a certain extent, the component It will have a great impact on the power quality of the power system.

[0063] Reference [Zhang Hao, Ma Aijun, Li Wenbin, et al. Research on the relationship between wind farm daily output curve and energy storage capacity [J]. China Electric Power, 2012,45(6):77-81. Algorithm for separating min-level load components , using the rolling average method to...

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Abstract

The invention discloses an energy storage capacity optimization method of a wind power farm based on min (minimum) component fluctuation of wind power. The method comprises the following steps that an energy storage capacity optimization configuration model of the wind power farm is established; the maximum charge-discharge power of an energy storage system is determined; effect evaluation of energy storage smooth wind power farm power is obtained according to an occupation ratio of a min component of output power of the wind power farm; an approximation degree between a reference output curve and a wind power farm output curve after the action of the energy storage system is analyzed according to correlation coefficients between a reference output of the wind power farm and an output after the action of the energy storage system; effect evaluation of smooth output power of the wind power farm under different time stages; and a smooth output of the wind power is achieved finally. On the basis of grasping the characteristic of the min component fluctuation of the wind power, the model determines the capacity configuration and the maximum charge-discharge power of the energy storage system with an interval estimation theory of probability statistics. The smooth output of the wind power is improved by energy storage equipment with smaller capacity, and adverse effects of random fluctuation of the wind power on an electric system are reduced.

Description

technical field [0001] The invention relates to a method for optimizing the energy storage capacity of a wind farm based on the min-level component fluctuation of wind power. Background technique [0002] The grid connection of wind power generation brings great challenges to the power quality and voltage stability of the power system [Rajesh Karki, Po Hu, Roy Billinton, et al. A simplified wind power generation model for reliability evaluation [J]. IEEE Transactions on Energy Conversion, 2006,21(2):533-540. Li Wenyi, Zhang Baohui, Ba Gen, et al. Influence of large-scale utilization of wind energy on power system reliability[J]. Chinese Journal of Electrical Engineering, 2008,28(1): 100-105 .Shinichi Nomura, Yoshihiro Ohata, Takushi Hagita, et al.Wind farms linked by SMES systems[J].IEEE Transactions on Applied Superconductivity,2005,15(2):1951-1954.], the reason is mainly because of wind power Random volatility and intermittency of itself [Lin Weixing, Wen Jinyu, Ai Xiaome...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32
CPCY02E10/76Y02E70/30
Inventor 麻常辉冯江霞张磊武乃虎蒋哲
Owner STATE GRID CORP OF CHINA
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