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Energy storage configuration method for smoothing power fluctuation of wind and photovoltaic power storage system

A power fluctuation and configuration method technology, applied in the direction of AC network load balancing, etc., can solve problems such as only considering the economic performance of the system and not being able to consider the stability of the system

Inactive Publication Date: 2014-04-02
STATE GRID CORP OF CHINA +2
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Problems solved by technology

The disadvantage of the existing technology is that it only considers the economic performance of the system, and cannot consider whether the system can be stable

Method used

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  • Energy storage configuration method for smoothing power fluctuation of wind and photovoltaic power storage system
  • Energy storage configuration method for smoothing power fluctuation of wind and photovoltaic power storage system
  • Energy storage configuration method for smoothing power fluctuation of wind and photovoltaic power storage system

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Embodiment Construction

[0060] The invention discloses an energy storage configuration method for smoothing power fluctuations of a wind-solar-storage system, which is mainly applicable to distributed power generation systems including photovoltaics and wind turbines. Such as figure 1 As shown, the configuration of the energy storage system is mainly divided into three links (six steps). The first link is the optimization preparation stage, which is mainly to search and analyze historical data for subsequent follow-up optimization work; the second link The link is to determine the power of the energy storage battery, mainly through the analysis of the expected power frequency band of the storage battery to determine the power demand of the energy storage battery; the third link is the energy demand of the storage battery, through the charging and discharging time of the storage battery Determine the frequency band and calculate the capacity requirements of the energy storage battery.

[0061] The pr...

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Abstract

The invention discloses an energy storage configuration method for smoothing the power fluctuation of a wind and photovoltaic power storage system. The method comprises the following steps: firstly, fixing distributive generating system composition of stored energy to be distributed, definitizing historical generating data of various distributive generating equipment of the system, and a forming distributive generating power sample, secondly, performing discrete Fourier transform to power output sample data, thirdly, fixing a stabilizing target of the power fluctuation of the distributive generating system, fourthly, fixing a theoretical value required for energy storage power, fifthly, correcting the power requirement of an energy storage battery, and fixing final energy storage power, and sixthly, fixing the capacity requirement of the energy storage battery, and accomplishing the energy storage configuration. By configuring an energy storage system, distributive power output power fluctuation is smoothed through the operation characteristics that the system can be charged and discharged of the system, and as a distributive power source is accessed to a power grid, the stable operation of the power grid is guaranteed.

Description

technical field [0001] The invention relates to a smooth wind-solar-storage system, in particular to an energy storage configuration method for smoothing power fluctuations of the wind-solar-storage system. Background technique [0002] At present, the power generated by intermittent distributed power sources such as wind power and photovoltaic power generation connected to the power grid will cause frequency fluctuations in the power grid and increase the burden on auxiliary services such as frequency regulation, voltage regulation, and operation scheduling of the power grid, resulting in an increase in the operating cost of the power grid; when the power fluctuation exceeds When the peak shaving capability of the power system is exceeded, it will further cause the frequency of the power system to exceed the limit, which seriously threatens the safe operation of the power system. [0003] In a distributed power generation system, mainly from the perspective of the impact of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32
Inventor 杨海晶余晓鹏李朝晖张振安刘巍赵勇张岩邹广宇于泷泽刘洁王芳李宁
Owner STATE GRID CORP OF CHINA
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