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Coordinated control strategy for parallel virtual synchronous generators based on diffusion algorithm
DOI:10.1016/j.seta.2026.105114.png)
Abstract
En 中文
This paper proposes a coordinated control strategy based on a diffusion algorithm to address the power oscillations and power allocation deviations caused by line impedance differences and dynamic characteristic mismatches when multiple virtual synchronous generators (VSG) are operated in parallel. First, a dynamic mutual damping mechanism is introduced. The mutual damping coefficient is dynamically adjusted using a diffusion algorithm to effectively suppress active power oscillations in the parallel system. Its stability is demonstrated using the Lyapunov energy function. Second, an adaptive virtual impedance control technique is designed. This technique, combined with a diffusion algorithm, allows for real-time impedance parameter correction, eliminating the need for line impedance measurement and enabling precise reactive power allocation. Furthermore, a voltage recovery strategy is constructed to maintain the average system output voltage at the rated level, improving voltage quality. Finally, simulations verify the effectiveness and robustness of the proposed strategy in suppressing oscillations, improving power allocation accuracy, and facilitating voltage recovery.
Keywords:
Virtual synchronous generator
Mutual damping
Diffusion algorithm
Adaptive virtualimpedance
Voltage recovery
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