IVSG-based Frequency Regulation Control Algorithm for High Capacity New Energy Grid Integration
CHEN Jing
DING Tianqi
Abstract：Aiming at the problem that grid frequency fluctuation amplitude increases due to power electronic devices lacking rotational inertia and damping characteristics which were inherited in synchronous generators when high capacity of new energy was integrated to the grid,a frequency regulation control algorithm based on the improved virtual synchronous generator(IVSG)for high capacity new energy grid integration was proposed.Firstly,the virtual synchronous generator control algorithm was constructed based on the correspondence relationship between the electrical quantities of synchronous generator mathematical model and inverter circuit.Secondly,power calculation in virtual synchronous generator algorithm was replaced with power measurement.Thirdly,a control relationship between voltage and reactive power was directly established to improve the reactive power-voltage control module.Finally,the selection of power measurement point and voltage measurement point were optimized by analyzing the concepts of the control quantity and the feedback quantity.A comparative experiment was carried out between the IVSG control algorithm and the traditional inverter control strategy.When the grid load increased,the lowest point of the grid frequency increased by 0.30%;when the grid load decreased,the highest point of the grid frequency decreased by 0.95%.The experiment proved that the amplitude of grid frequency fluctuation could be significantly reduced by the IVSG-based frequency regulation control algorithm.
Keywords：virtual synchronous generatorgrid integrated invertercontrol algorithm optimizationfrequency fluctuationprimary frequency controlrotational inertia
Publication Date：2025-06-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 244-252 )