Oscillation Suppression Strategy for Multi-VSG System with Decentralized Mutual Damping Transient Compensation
There is a difference in dynamic response between virtual synchronous generators(VSGs),resulting in the oscillation of multi-VSG parallel systems in the transient process of load switching.The paper proposes a decentralized mutual damping transient compensation strategy to effectively suppress the oscillation of the multi-VSG parallel systems in the transient process.Firstly,the small signal mathematical model of the rotor equation of the multi-VSG parallel system is established,and the oscillation mechanism of the system is analyzed.According to the key parameters of VSG,the system stability is discussed.Then,the mutual damping of VSG is increased to accurately control the dynamic response process of each VSG,speeding up the synchronization process and enhancing the syn-chronization performance.At the same time,the transient compensation link is designed to provide the necessary transient damping and power compensation for the system,so that to restore the system stability in the face of dis-turbances.Finally,the correctness and effectiveness of the proposed oscillation suppression strategy are verified on the MATLAB simulation platform.
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