Research on Structural Specification and Virtual Construction Method of Physical-Field for Digital Twin Model of C5f10o Insulated Bushing

The valve side bushing of converter transformer is the important component in the ultra-high voltage direct current transmission system. It is of great significance to conduct state evaluation analysis and fault warning. Traditional fault warning and state evaluation methods rely on large amount of physical experiments and manual data collection. The design process of the valve side bushing is time-consuming and relies on human design experience. Therefore, this article proposes a standard for constructing digital twin models of equipment around the valve side bushing of converter transformers, and based on geometric model of the solid bushing, carries out the construction of twin models for the valve side bushing of the converter transformers. In order to achieve the timeliness of the twin model calculation, this paper adopts the partitioned order reduction POD method to reduce the order of the twin model, significantly improving the calculation speed of the electromagnetic thermal flow coupling model on the valve side bushing. Based on the proposed digital twin model structure specification, this paper constructs digital twin visualization platform for the converter valve side bushing, effectively improving the efficiency of valve side bushing design and monitoring, and achieving the visual monitoring of valve side bushing and the application of digital twin technology.