arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2104.04819eess.SYcs.SY
收藏

含蓄电池储能系统的微电网实时运行优化--基于管道的模型预测控制方法

Real-time Operation Optimization of Microgrids with Battery Energy Storage System: A Tube-based Model Predictive Control Approach

Cheng Lyu, Youwei Jia, Zhao Xu

摘要:

电池储能系统(ESS)广泛应用于微电网,以补充高可再生能源。然而,含电池储能系统的微电网实时能量管理面临两个方面的挑战:1)电池能量水平的演化过程是跨时间耦合的; 2)可再生能源发电量预测过程中不可避免地会出现不确定性。针对含电池储能系统的微电网实时能量管理问题,提出了一种基于管模型的模型预测控制(MPC)方法。首先,针对电池储能系统,建立了包含电池退化代价和时间感知SoC范围的电池实时运行模型,描述了电池的“浅廉价”特性,满足终端SoC需求。其次,在所提出的基于管道的MPC中设计了两个级联的MPC控制器,其中名义MPC在不存在不确定性的情况下生成参考轨迹,辅助MPC在实现不确定性时将实际轨迹引导到名义轨迹。具体而言,在本文中,电池SoC被视为系统的状态变量,而发电机的功率输出和与公用事业交换功率被视为控制变量。最后,许多案例研究表明,所提出的方法,包括低和高渗透水平的可再生能源的有效性。连续365天的Monte Carlo模拟结果表明,该方法的竞争比优于1.10。

英文摘要:

Battery energy storage systems (ESS) are widely used in microgrids to complement high renewables. However, the real-time energy management of microgrids with battery ESS is challenging in two aspects: 1) the evolution process of battery energy level is across-time coupled; 2) uncertainties unavoidably arise in the forecasting process for renewable generation. In this paper, a tube-based model predictive control (MPC) approach is innovatively proposed in accommodating the real-time energy management of microgrids with battery ESS. Firstly, a real-time operation model of battery, including the degradation cost and time-aware SoC range, is proposed for the battery ESS. In particular, the battery feature shallower-cheaper is depicted and the terminal SoC requirement is achieved. Secondly, two cascaded MPC controllers are designed in the proposed tube-based MPC, in which reference trajectories are generated by the nominal MPC without uncertainties, and then the ancillary MPC steers the actual trajectories to the nominal ones upon the realization of uncertainties. Specifically, in this paper, the battery SoC is viewed as the state variable of the system, while the generator power output and exchange power with the utility are seen as control variables. Lastly, numerous case studies demonstrate the effectiveness of the proposed approach, including both the low and high penetration level of renewables. Additional Monte Carlo simulations of consecutive 365 days show that the competitive ratio of the proposed approach is excellently below 1.10.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑