New Distribution Network Digital Twin Construction Technology and its Application in Accident Planning

The access of renewable energy, the interaction of distributed energy storage and flexible load, and the interconnection of multi-types of comprehensive energy make the distribution system gradually show the development trend of a new business, showing the complex operation condition of source-load uncertainty. The digital twin can provide key technical support for the transition of the distribution network to the new business mode and improve the accuracy and practicability of the auxiliary decision of the power network accident plan. This paper firstly constructs the digital twin virtual model of medium voltage distribution network, analyzes the characteristics of the new distribution network, realizes the mapping between the new distribution network physical model and the digital twin virtual model, and constructs the digital twin system of the new distribution network. Then, it introduces the construction of typical operation scenarios of the new distribution network based on clustering technology, and analyzes the power failure based on typical operation scenarios, and puts forward the power failure impact analysis method based on the automatic configuration type. Ensure the authenticity and typicality of fault operation scenarios and the effectiveness and accuracy of accident plans. Finally, several operation scenarios of the digital twin in the new distribution network accident are discussed, including fault scenario construction, online auxiliary decision of the accident plan and the effect analysis of the accident plan. It is proved that digital twin technology has significant advantages in improving the efficiency of accident plan making, optimizing the scheduling decision-making process and reducing the accident loss.