汽车工程 ›› 2024, Vol. 46 ›› Issue (6): 1045-1053.doi: 10.19562/j.chinasae.qcgc.2024.06.011

• • 上一篇    下一篇

基于数字孪生混合储能的电动汽车参与微电网负荷功率波动平抑研究

马龙飞(),张宝群,王立永,曾佳妮,焦然,宫成   

  1. 国网北京市电力公司电力科学研究院,北京 100075
  • 收稿日期:2023-12-21 修回日期:2024-02-01 出版日期:2024-06-25 发布日期:2024-06-19
  • 通讯作者: 马龙飞 E-mail:malongfei19870@163.com
  • 基金资助:
    国网公司科技项目(考虑新能源消纳的车网互动商业模式研究)(520223230010)

Research on Participation of Electric Vehicles in Microgrid Load Power Fluctuation Mitigation Based on Digital Twin Hybrid Energy Storage

Longfei Ma(),Baoqun Zhang,Liyong Wang,Jiani Zeng,Ran Jiao,Cheng Gong   

  1. Electric Power Research Institute,State Grid Beijing Electric Power Company,Beijing 100075
  • Received:2023-12-21 Revised:2024-02-01 Online:2024-06-25 Published:2024-06-19
  • Contact: Longfei Ma E-mail:malongfei19870@163.com

摘要:

针对电动汽车接入微电网后负荷峰值会显著增加,使得峰谷差提升,从而影响微电网的稳定运行的问题,提出基于数字孪生混合储能的电动汽车参与微电网负荷功率波动平抑方法。通过计算电动汽车初始荷电状态和电动汽车离网时间,分析电动汽车负荷特性;将数字孪生技术和微电网混合储能系统相结合,构建数字孪生混合储能模型,结合电动汽车负荷特性结果,构建负荷功率波动平抑目标函数,实现负荷功率波动一次控制;通过HESSS自调节二次修正负荷功率,完成电动汽车参与微电网负荷功率波动平抑。测试结果显示:在该方法应用下负荷功率的波动情况均在20~60 kW之间,微电网供电不足概率结果均低于33%,典型日和非典型日中电力负荷峰谷差的结果均在44%以下。由此说明该方法能够分析电动汽车在不同的状态下的荷电状态,可有效实现微电网负荷功率平抑。

关键词: 数字孪生, 混合储能, 电动汽车, 微电网, 负荷功率, 波动平抑

Abstract:

For the problem that the peak load of electric vehicles will increase significantly after they are connected to the microgrid, which will cause the peak-valley difference to increase, and thus affect the stable operation of the microgrid, a method for reducing load power fluctuation of electric vehicles participating in the microgrid based on digital twin hybrid energy storage is proposed. The load characteristics of electric vehicles are analyzed by calculating the initial charging state and off-grid time of electric vehicles. Combining the digital twin technology with the microgrid hybrid energy storage system, the digital twin hybrid energy storage model is constructed, and the load power fluctuation flattening objective function is constructed according to the load characteristics of electric vehicles, so as to realize the one-time control of load power fluctuation. The load power fluctuation of electric vehicles participating in microgrid is stabilized by HESSS self-regulation and secondary load power correction. The test results show that the load power fluctuation is between 20 and 60 kW under the application of the method, with the power supply shortage probability of the microgrid lower than 33%, and the peak-valley difference of the power load in typical and atypical day lower than 44%. It shows that this method can analyze the charging state of electric vehicles under different states, and can effectively realize the load power leveling of microgrid.

Key words: digital twin, hybrid energy storage, electric vehicles, microgrid, load power, fluctuation flattening