摘要
While simulating the characteristics of synchronous generators to provide the inertia support, the virtual synchronous generator (VSG) inevitably leads to the problem of active power oscillation. Especially in the case of multi-VSG interacting, the low mutual damping between VSGs intensifies the oscillation volatility, which may damage the stable operation of the system and the effective regulation of the renewable energy. Currently, in the methods of using the distributed communication architectures to suppress the multi-VSG active power oscillation, the optimization of active power output and the algorithm convergence under the non-ideal communication conditions are often neglected. Hence, to suppress the power oscillations of the system and improve the mutual damping, firstly, the principle of parallel and interactive oscillation of the VSG system is analyzed. Simultaneously, the performance evaluation function constructed by using the power angle is applied to derive the consensus algorithm for increasing the mutual damping so that the frequency of VSG in the system under disturbance may converge more quickly and achieve consensus. Secondly, the stability of the system is proved by constructing the Lyapunov energy function. On this basis, the influence of mutual damping parameters on the stability of the system is analyzed by using the Nyquist curve in the frequency domain. Finally, the electromagnetic transient simulation proves that the mutual damping consistency algorithm is able to effectively suppress the power oscillation of the parallel VSG system, and also ensure the effectiveness of the algorithm in the non-ideal communication environment. ? 2023 Power System Technology Press.