Virtual synchronous generators for voltage synchronization of a hybrid PV-diesel power system. (May 2020)

• Record Type: Journal Article
• Authors: Belila, Ahmed; Amirat, Yassine; Benbouzid, Mohamed; Berkouk, El Madjid; Yao, Gang
• Is Part Of: International journal of electrical power & energy systems. Volume 117(2020)
• Publication Date: 2020-05
• Subjects: Hybrid generation system -- Virtual synchronous generator -- Voltage synchronization -- Power sharing; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2019.105677
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: A control strategy based on virtual synchronous generators for a standalone hybrid generation system. Voltage source inverter synchronization and the diesel generator without a phase-locked loop. Correcting the diesel generator rotor initial position. Abstract: To ensure the synchronization process in a hybrid PV-Diesel generation system parallel topology, a phase-locked loop is generally used to estimate the angular frequency of the point of common coupling. However, the DG rotor inaccessibility imposes its operation mode as a master. This will therefore affect the system overall stability since the phase-locked loop is affected by oscillations, which are predicted by the power-angle curve concept interacting with the DG rotary inertia. In this context, this paper proposes a new control strategy based on virtual synchronous generators for a stand-alone PV-Diesel hybrid generation system to synchronize the output voltages without a phase-locked loop, while correcting the diesel generator rotor initial position and ensuring power sharing between the two sources, according to a desired power ratio. To prove the effectiveness of the proposed control strategy, simulation and experiments are carried out. The achieved results clearly illustrated the feasibility and the improvement brought by the proposed virtual synchronous generators-based control strategy.