Control strategy of distributed generations integration systems based on robust virtual synchronization

In recent years, with the increasingly serious problems such as environmental pollution and fossil energy exhaustion, distributed generations have been developed rapidly, and will become an important component of the construction of new power system. However, large-scale grid connection of distributed generations will cause a series of problems. Under conventional control, the inertia of distributed generations integration system is low and the anti-interference performance is poor. Therefore, this paper proposes a robust virtual synchronous control technology for distributed generation to improve the stable operation ability of the system under external disturbance. Firstly, the structure of distributed generations integration systems is described in detail. Based on the traditional distributed generations droop control strategy, an improved converter control strategy based on robust virtual synchronization is then proposed. Finally, the PSCAD simulation platform is used for modeling and perturbation examples to verify the effectiveness of the proposed control strategy.