NDLI: Improved auto-synchronisation of grid-connected PV inverter based on the DC capacitor voltage control

Content Provider	IET Digital Library
Author	Musengimana, Antoine Zheng, Xuemei Li, Haoyu
Abstract	Based on inherent dynamics similarity between synchronous generator (SG) and DC capacitor power port, this study proposes an improved synchronisation control method of grid-connected PV inverter based on DC capacitor voltage control where a DC-link capacitor voltage is regulated to provide the synchronisation angle. The proposed control method uses the estimated grid angle feedforward to improve the damping performance of the system under disturbances. To assess the robustness of the proposed control method, a two-step procedure is followed. Firstly, a reduced-order model of the system was derived. Secondly, the performance and stability of the proposed control method were fully investigated through the eigenvalue analysis. The offline simulations and real-time simulations are carried in PLECS software and PLECS RT Box, respectively in order to validate and demonstrate the effectiveness of the proposed control method. It has been found that the proposed control method yields a large band controller parameter setting while maintaining system stability. The results showed that the proposed method improved the operating capability and enhanced the performance of the system under disturbances and weak grid operation.
Starting Page	684
Ending Page	694
Page Count	11
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 5, Apr (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0516
Journal	IET Renewable Power Generation
Publisher Date	2020-01-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Band Controller Parameter Control Method Yields Control of Electric Power System Damping DC Capacitor Voltage Control DC-link Capacitor Voltage Eigen Values And Eigen Function Estimated Grid Angle Feedforward Grid-connected PV Inverter Improved Auto-synchronisation Improved Synchronisation Control Method Invertors Photovoltaic Power System Power Converter Power Grid Power Supplies to Apparatus Solar Power Stations Synchronisation Synchronisation Angle Synchronous Generator Synchronous Machine Voltage Control
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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