A Resilience Enhancement Method for Active Distribution Networks Based on Hybrid Control Strategy
In response to the problem that traditional grid-following control for new energy grid connection is diffi-cult to quickly and actively respond to faults,a hybrid control method based on the combination of grid-forming and grid-following control is proposed.Based on the unified modeling method,control models for grid-forming and grid-following control are established to improve the adaptability of the model to different types of controllers.Through power decoupling and extended state observation,the dynamic response and control structure of the dis-tributed power grid are analyzed.The proposed unified controller is used to stabilize the control of different types of inverters in the distribution network,and the voltage deviation state is controlled within the expected range.The proposed method has been verified through simulation and examples to not only improve the immunity of the distribution network to system interference,but also improve the stable operation ability of the distribution net-work.
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