刘宇凝, 王迎丽, 徐明文, 张晓珩. 基于数字孪生混合储能的风电功率波动平抑策略[J]. 电网技术, 2021, 45(7): 2503-2513. DOI: 10.13335/j.1000-3673.pst.2021.0188
引用本文: 刘宇凝, 王迎丽, 徐明文, 张晓珩. 基于数字孪生混合储能的风电功率波动平抑策略[J]. 电网技术, 2021, 45(7): 2503-2513. DOI: 10.13335/j.1000-3673.pst.2021.0188
LIU Yuning, WANG Yingli, XU Mingwen, ZHANG Xiaoheng. Wind Power Fluctuation Smooth Strategy Based on Digital Twin Hybrid Energy Storage[J]. Power System Technology, 2021, 45(7): 2503-2513. DOI: 10.13335/j.1000-3673.pst.2021.0188
Citation: LIU Yuning, WANG Yingli, XU Mingwen, ZHANG Xiaoheng. Wind Power Fluctuation Smooth Strategy Based on Digital Twin Hybrid Energy Storage[J]. Power System Technology, 2021, 45(7): 2503-2513. DOI: 10.13335/j.1000-3673.pst.2021.0188

基于数字孪生混合储能的风电功率波动平抑策略

Wind Power Fluctuation Smooth Strategy Based on Digital Twin Hybrid Energy Storage

  • 摘要: 针对风电出力的波动性和预测的不准确性,提出一种基于数字孪生混合储能(digital twin hybrid energy storage,DTHES)的控制策略,对储能设备的运行效率进行优化。该策略综合考虑了风电并网波动、预测模型误差和储能设备的使用效率。首先,将注意力机制(Attention)引入门控循环单元(gated recurrent unit,GRU)中,建立Attention-GRU预测模型。然后,结合并网功率波动标准和不同储能设备的响应特性,对数字孪生预测数据进行虚拟变分模态分解(virtual variational mode decomposition,VVMD),得到初级分配功率。最后,考虑储能设备的运行效率和使用寿命问题,应用混合储能服务系统对虚拟混合储能的初级分配功率进行修正,得到最终分配功率。基于中国东北某地区风电厂数据进行实验,验证了该策略能够提高风电预测效率和精度、抑制风电并网波动的同时,增强储能设备的利用效率。

     

    Abstract: In view of the volatility of the wind farm output and the inaccuracy of the wind prediction, a digital twin hybrid energy storage (DTHES) based control strategy is proposed to optimize the operating efficiency of the energy storage equipment. The strategy considers the fluctuation of the wind power grid connection, the error of the prediction results and the efficiency of the energy storage equipment. Firstly, the Attention-GRU prediction model is established by introducing the Attention mechanism into the gated recurrent unit. Then, combined with the grid-connected power fluctuation standard and the response characteristics of different energy storage devices, the virtual variational mode decomposition (VVMD) is performed on the digital twin prediction data to obtain the primary distributed power. Finally, considering the limitations of the operating efficiency and service life of the energy storage equipment, the hybrid energy storage service system is used to modify the primary distributed power of the virtual hybrid energy storage to obtain the final distributed power. Experiments based on the wind power plant data in a certain area of Northeast China have verified that the strategy can improve the efficiency and accuracy of the wind power prediction, suppress the fluctuation of the wind power grid connection effectively, and enhance the utilization efficiency of the energy storage equipment.

     

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