학술논문
Pre-Synchronization Method of Virtual Synchronous Generator Applied to Microgrid
Document Type
Conference
Author
Source
2023 2nd International Conference on Artificial Intelligence and Computer Information Technology (AICIT) Artificial Intelligence and Computer Information Technology (AICIT), 2023 2nd International Conference on. :1-4 Sep, 2023
Subject
Language
Abstract
Virtual Synchronous Generator (VSG) can effectively mitigate the inertia drop caused by grid connection of renewable energy, but VSG is prone to generate transient current at the moment of grid connection, resulting in switchover failure. This paper presents a pre-synchronization method for VSG off-grid switching. First, the control principle of VSG is analyzed. Secondly, an improved PLL-free pre-synchronization control strategy is proposed, which eliminates the PLL and simplifies the control structure. Finally, the correctness of the proposed strategy is verified by the simulation results.