Digital Twin Technology for Voltage Coordination Control in New Energy Station

When the power grid experiences unbalanced voltage drops, inverter-based new energy stations may face risks such as voltage drop and current limit violations. These risks may cause the power station to disconnect from the grid, resulting in serious consequences. Traditional inter-plant coordination control methods for new energy sources suffer from major drawbacks, primarily due to their single-objective nature and heavy reliance on real-time communication. To address these issues, this paper proposes a multi-objective voltage support coordination control strategy for new energy plants based on digital twin technology. Firstly, a multi-objective coordination control framework among new energy plants is developed, which, while ensuring the operational safety of inverters, aims to simultaneously maximize voltage support at the grid connection point and reduce grid imbalance. Then, a digital twin model of new energy systems is constructed with a focus on control characteristics, and this model is used to implement the proposed coordination control strategy. This approach significantly reduces dependency on real-time communication and enhances the responsiveness of coordinated control. Finally, a digital twin-based testing platform is built using the real-time digital simulation system RTDS/RSCAD to validate the effectiveness of the proposed method. The introduction of this method provides new ideas and solutions for the coordinated control of new energy systems.