TY  - EJOU
AU  - Liu, Hongbo 
AU  - Zhang, Ziye 
AU  - Zhang, Qiting 

TI  - Improved Virtual Synchronous Control Strategy Based on Angular Frequency Self-Compensation
T2  - Energy Engineering

PY  - 
VL  - 
IS  - 
SN  - 1546-0118

AB  - Conventional virtual synchronous generator (VSG) control faces multiple multi-objective conflicts, including the coupling between droop control and the damping loop, the inherent trade-off between dynamic response speed and overshoot suppression, and the deterioration of active power dynamic performance under power-reference and frequency disturbances. To address these issues, this paper proposes an angular-frequency self-compensation (AFSC)-based VSG control strategy. The main novelty of the proposed approach lies in reconstructing the VSG control structure by introducing an angular-frequency self-feedforward loop to replace the conventional damping loop. This design provides effective damping without affecting the steady-state active power output, thereby achieving a clear decoupling between the damping coefficient and droop control. Furthermore, by neglecting terms with weak influence on system stability in the small-signal model, a reduced-order equivalent second-order model is established, based on which parameter design guidelines are developed to facilitate controller tuning in practical applications. The proposed AFSC-VSG is systematically analyzed under grid-connected operation and validated through MATLAB/Simulink simulations under various typical scenarios, including active and reactive power reference variations, grid frequency disturbances, and different grid strength conditions. Comparative simulation results demonstrate that, compared with existing VSG strategies based on control-structure reshaping, the proposed method simultaneously improves overshoot suppression and dynamic response speed. As a result, active power dynamic performance is significantly improved and system stability is enhanced over a wide range of operating conditions. In addition, a parallel system consisting of two VSGs is investigated to analyze the dynamic characteristics under different damping ratio configurations, and corresponding parameter tuning guidelines are provided.
KW  - Virtual synchronous generator; active power oscillation; root locus analysis; small-signal model reduction; transient damping

DO  - 10.32604/ee.2026.075689