Coordinated control method of distributed energy storage units in a DC microgrid considering communication delay

被引：0
|
作者：
Mi Y. [1 ]
Wang X. [1 ]
Qian Y. [1 ]
Deng J. [1 ]
Han Y. [1 ]
机构：
[1] College of Electrical Engineering, Shanghai University of Electric Power, Shanghai
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2022年 / 50卷 / 24期
基金：
中国国家自然科学基金;
关键词：
consistency control; DC microgrid; distributed energy storage; model predictive control;
D O I：
10.19783/j.cnki.pspc.220125
中图分类号：
学科分类号：
摘要：
A model predictive control (MPC) strategy considering communication delay is proposed to solve the coordination problem among multiple energy storage units of a distributed energy storage system in a DC microgrid. First, a state space model of multiple energy storage units is built, and the MPC and current expectation trajectory of multiple energy storage units are designed. Then the consistency law of communication delay is taken into account to compensate for the SOC deviation caused by communication delay. Then, by finding the optimal solution of the objective function with the fast-tracking current dynamic expected value and the minimum change of the control signal, the DC bus voltage of the system is guaranteed to be stable. Also the coordinated and stable operation between the energy storage units and the SOC-based dynamic consistent balance are realized. Finally, the Matlab/Simulink simulation platform is used to verify the effectiveness and stability of the proposed control strategy in the charging and discharging process of energy storage and source and load fluctuations taking into account the communication delay. © 2022 Power System Protection and Control Press. All rights reserved.
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页码：91 / 100
页数：9
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