Method for carrying out self-adaptive smoothing treatment on wind power by battery energy storage system

A battery energy storage system, wind power technology, applied in wind power generation, energy storage, single network parallel feed arrangement, etc., can solve the problems of insufficient control, failure to consider fluctuations, and inapplicability of adaptive algorithms, etc. To achieve the effect of improving adaptability

Inactive Publication Date: 2012-10-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

However, on the one hand, this method only considers the limiting factors of SOC and does not consider the current fluctuations, so the control is not comprehensive enough; on the other hand, it does not have universal applicability in the adaptive algorithm

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  • Method for carrying out self-adaptive smoothing treatment on wind power by battery energy storage system
  • Method for carrying out self-adaptive smoothing treatment on wind power by battery energy storage system
  • Method for carrying out self-adaptive smoothing treatment on wind power by battery energy storage system

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Embodiment Construction

[0028] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0029] figure 1 It is a schematic diagram of self-adaptive smoothing of wind power by using battery energy storage system. figure 1 Among them, through the effective control of the charge and discharge of the battery energy storage system, according to the SOC (State Of Charge) level of the battery energy storage system and the fluctuation rate γ of wind power, the filtering of the first-order low-pass filter is adaptively adjusted The time constant τ realizes the coordinated control of wind turbines and battery energy storage. The power P of the wind turbine wg The grid-connected power reference value P is obtained through a first-order low-pass filter gr , the difference between the two is the power P of the batt...

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Abstract

The invention discloses a method for carrying out self-adaptive smoothing treatment on wind power by a battery energy storage system in the technical field of power control. The method comprises the steps of: establishing a two-dimensional cloud model controller; acquiring grid-connection power of last moment, wind power of the current moment and the charging state of the battery energy storage system; calculating the volatility of the wind power of the current moment; substituting the volatility of the wind power of the current moment and the charging state of the battery energy storage system as the input data of the two-dimensional cloud model controller into the two-dimensional cloud model controller, and calculating to obtain the filtering time constant of the current moment; calculating the grid-connection power of the current moment and the power of the battery energy storage system of the current moment; and controlling the battery energy storage system to discharge according to the power of the battery energy storage system of the current moment. According to the method disclosed by the invention, the adaptability of the self-adaptive smoothing treatment is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power control, and in particular relates to a method for self-adaptive smoothing processing of wind power by using a battery energy storage system. Background technique [0002] Due to the intermittence and volatility of wind power and other new energy power generation, its large-scale access will bring significant difficulties to grid power generation dispatching and frequency regulation and peak regulation, and will also have adverse effects on system stability and power quality. Therefore, from the perspective of safe and economic operation of the power grid, large-scale intermittent power access must be dispatchable, that is, active power and reactive power must be reasonably and effectively controlled, and its output power fluctuations should be reasonably stabilized. Smoothing should be done before grid connection. [0003] Relying on the combination of large-scale energy storage and large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38
CPCY02E10/763Y02E70/30Y02E10/766Y02E10/76
Inventor 韩晓娟宋志惠张浩张斌
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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