Consensus-based secondary control for DC microgrids with communication delays via a networked predictive control strategy

Dai, Xiaoran1; Liu, Guo-Ping2,3; Hu, Wenshan1; Deng, Qijun1

2024-05-01

10.1016/j.isatra.2024.02.024

ISA TRANSACTIONS   影响因子和分区

0019-0578

1879-2022

In today's cyber-physical microgrid systems, the consensus -based secondary control is generally utilized to settle the voltage deviation and rough current allocation issues at the primary control level. However, time delays follow inevitably the introduction of sparse communication networks, and most existing works adopt passive tolerance approaches. To actively alleviate the unavoidable delay effect in microgrids' communication networks, a networked predictive control (NPC) strategy is proposed for an islanded DC microgrid subject to time delays in this paper. Firstly, the predictive approaches for both voltage and current are developed based on the cyber-physical microgrid model. Unlike the practice of passively tolerating time delays, the NPC strategy is proposed to actively compensate for the effect of communication delays by estimating real-time voltage and current values using the previously obtained prediction models. Moreover, to prove the generality of the developed method, the microgrid systems' stability can be derived from the Schur stability of the closed -loop system, thus the DC microgrid can achieve voltage regulation and proportional current sharing simultaneously. Finally, the performance of our method against the time delay effect is validated by extensive experiments on an islanded 48-V DC microgrid system, in terms of its feasibility, delay tolerance ability, and robustness to load changes and communication faults. Experimental results demonstrate the effectiveness and superiority of the NPC strategy.

DC microgrids Communication delays Cooperative control Active predictive compensation Networked predictive control

SCI ; EI

英语

通讯

National Natural Science Foundation of China["62173255","62073247"]

Automation & Control Systems ; Engineering ; Instruments & Instrumentation

Automation & Control Systems ; Engineering, Multidisciplinary ; Instruments & Instrumentation

WOS:001241419400001

ELSEVIER SCIENCE INC

ENGINEERING

Web of Science

1.Wuhan Univ, Sch Elect Engn & Automat, Wuhan 430072, Peoples R China
2.Southern Univ Sci & Technol, Ctr Control Sci & Technol, Shenzhen 518055, Peoples R China
3.1088 Xueyuan Ave, Shenzhen 518055, Guangdong, Peoples R China

Dai, Xiaoran,Liu, Guo-Ping,Hu, Wenshan,et al. Consensus-based secondary control for DC microgrids with communication delays via a networked predictive control strategy[J]. ISA TRANSACTIONS,2024,148.

Dai, Xiaoran,Liu, Guo-Ping,Hu, Wenshan,&Deng, Qijun.(2024).Consensus-based secondary control for DC microgrids with communication delays via a networked predictive control strategy.ISA TRANSACTIONS,148.

Dai, Xiaoran,et al."Consensus-based secondary control for DC microgrids with communication delays via a networked predictive control strategy".ISA TRANSACTIONS 148(2024).