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Energy storage battery system power giving method for stabilizing wind power grid connection power fluctuation

An energy storage battery, power given technology, applied in the electrical field, can solve the problems of great difficulty and strong dependence on wind power forecasting

Active Publication Date: 2012-09-12
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the energy storage charge and discharge plan (output target) is arranged based on the wind power forecast data, which is highly dependent on the wind power forecast.
Due to the limitation of prediction accuracy, the charging and discharging of energy storage may play a role in "reversing" wind power fluctuations, which is relatively difficult in practical applications

Method used

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  • Energy storage battery system power giving method for stabilizing wind power grid connection power fluctuation
  • Energy storage battery system power giving method for stabilizing wind power grid connection power fluctuation
  • Energy storage battery system power giving method for stabilizing wind power grid connection power fluctuation

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Embodiment Construction

[0071] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0072] Such as figure 1 as shown, figure 1 It is a structural block diagram of the power setting method of the battery energy storage control system for stabilizing wind power grid-connected power fluctuations provided by the present invention; wherein the system for realizing the method of the present invention includes a wind-storage grid-connected power fluctuation rate calculator 1, a power fluctuation rate comparison 2, filter time constant regulator 3, first-order digital low-pass filter 4, energy storage battery state of charge SOC regulator 5, energy storage battery state of charge SOC comparator 6, wind power grid-connected target power accumulator after smoothing 7. Subtractor 8. Energy storage power reference checker 9.

[0073] Wind-storage grid-connected power fluctuation rate calculator 1 is used to calcu...

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Abstract

The invention relates to an energy storage battery system power giving method for stabilizing wind power grid connection power fluctuation. The method comprises the following steps of: (1) determining a sampling control period, and initializing a filtering time constant and a wind power grid connection target power offset value; (2) reading current battery charge percent; (3) calculating a smoothened wind power grid connection power target value; and (4) calculating the output target value of an energy storage battery system. According to the method provided by the invention, the change rate of wind power output power fluctuation can be reduced, power smoothening standby of the energy storage battery system is considered simultaneously, and the wind power smoothening capability of an energy storage battery is brought into full play.

Description

technical field [0001] The invention relates to a power setting method in the field of electrotechnical technology, in particular to a power setting method for an energy storage battery system for smoothing wind power grid-connected power fluctuations. Background technique [0002] In order to ensure the balance of power supply and demand and the security of the power grid, the large-scale and high-frequency fluctuations of wind power have brought great adjustment pressure and burden to other power sources in the power system. Therefore, the "Technical Regulations for Connecting Wind Farms to the Grid" has the following regulations on the maximum power change rate of wind power: wind farms should limit the change rate of output power. The maximum power change rate includes 1min power change rate and 10min power change rate, the specific limits can refer to the table below. [0003] Table 1 Recommended value of maximum power change rate of wind farm [0004] Wind f...

Claims

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Application Information

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IPC IPC(8): H02J3/28
CPCY02E10/76Y02E70/30
Inventor 单茂华
Owner CHINA ELECTRIC POWER RES INST
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