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An energy storage SOC optimization control method in a wind storage system

A technology that optimizes control and energy storage systems. It is applied in wind power generation, energy storage, and greenhouse gas reduction. It can solve problems such as excessive charging and discharging, and affecting the effect of power fluctuation stabilization.

Inactive Publication Date: 2015-10-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, since the output power of wind farms fluctuates irregularly, the energy storage system may discharge more or charge more in the future, and the moderate SOC position is not always optimal for the energy storage system, so it cannot Completely avoid overcharge and overdischarge, which will affect the power fluctuation stabilization effect

Method used

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  • An energy storage SOC optimization control method in a wind storage system
  • An energy storage SOC optimization control method in a wind storage system
  • An energy storage SOC optimization control method in a wind storage system

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Embodiment

[0039] figure 1 It is a control structure diagram of the energy storage SOC optimization control method in the wind storage system of the present invention. Such as figure 1 As shown, the energy storage SOC optimization control method in the wind storage system of the present invention mainly includes two parts, the first part is the optimal SOC range calculation module, according to the predicted power of the wind farm and the rated power, rated capacity and energy storage Information such as the normal working range of the SOC is used to calculate the optimal initial SOC range of the energy storage system for a period of time in the future through the energy storage SOC optimization model based on the particle swarm algorithm, and it is used as the control target of the SOC real-time control module. The SOC real-time control module formulates a reasonable charging and discharging strategy for the energy storage system through the energy storage SOC real-time control strateg...

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Abstract

The invention discloses an energy storage SOC optimization control method in a wind storage system. According to predicted power of a wind power farm in a period of time in the future, a particle swarm algorithm is used for solving an SOC optimization model to obtain the optimal SOC range of an energy storage system in the running process of the wind storage system; according to real-time charge states, the charge state migration proportion relative to the optimal SOC range is obtained, the charge state migration proportion and the set power at the current moment of the energy storage system are used as input, a filtering time constant is used as output, a fuzzy control strategy is used for adjusting the filtering time constant in real time, and grid-connection power is stabilized through low-pass filtering of real-time power of the wind power farm. According to the energy storage SOC optimization control method, the SOC of the energy storage system is adjusted in advance according to the predicted power of the wind power farm, therefore overcharging and overdischarging phenomena are avoided, and the output power of the wind power farm is smoothened for a long time.

Description

technical field [0001] The invention belongs to the technical field of wind farm power fluctuation stabilization, and more specifically relates to an energy storage SOC optimization control method in a wind storage system. Background technique [0002] In recent years, wind power has attracted the attention of countries all over the world due to its advantages of environmental protection and abundant resources, and has become an important source of non-fossil fuel power generation. However, wind energy has the characteristics of randomness and intermittentness. It is difficult for an independent wind power generation system to provide stable and continuous power output, and the fluctuation is large. Direct integration into the grid will inevitably affect the safe and stable operation of the power system. Therefore, from the perspective of power grid security, it is an inevitable trend for future wind power generation to introduce energy storage devices to wind farms to stabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/28
CPCY02E10/766Y02E70/30Y02E10/76
Inventor 邹见效徐红兵彭超辛晓帅石洁
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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