Distributed Sliding Mode Observer-Based Secondary Control for DC Microgrids Under Cyber-Attacks

Autor:	Shu Yuen Hui, Yajie Jiang, Yun Yang, Siew-Chong Tan
Rok vydání:	2021
Předmět:	State variable Observer (quantum physics) business.industry Computer science Control theory Distributed generation Convergence (routing) Control variable Mode (statistics) Electrical and Electronic Engineering business Stability (probability) Power (physics)
Zdroj:	IEEE Journal on Emerging and Selected Topics in Circuits and Systems. 11:144-154
ISSN:	2156-3365 2156-3357
DOI:	10.1109/jetcas.2020.3046781
Popis:	The conventional distributed secondary control is widely adopted for distributed energy resources (DERs) in DC microgrids to achieve bus voltage restorations and output current/power sharing. However, when the DER systems are under cyber-attacks, the control variables of the conventional distributed secondary control will deviate from the nominal parameters and the stability of entire DC microgrids may not be guaranteed anymore. To this end, a distributed sliding mode observer (DSMO)-based secondary control is proposed in this paper. Based on local and neighboring measurements, the DSMO initially detects the false signals. Then, the estimated false signals are compensated by the control variables of the secondary control to eliminate the adverse impact. The stability of DSMO is verified by the convergence of the state variables. Both simulation and experimental results have validated that the proposed DSMO-based secondary control can effectively regulate the DER systems to track the bus voltage references and the desired output current/power under various types of cyber-attacks.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fb65945795df4259203ccded3a2c46df https://doi.org/10.1109/jetcas.2020.3046781 Zobrazit plný text záznamu