Integration of Digital Twin Model System for Ultra-high Voltage Converter Transformer Valve-Side Bushing

doi:10.11930/j.issn.1004-9649.202402076

Abstract

Abstract:

An integrated design method of digital twin system is proposed to meet the practical application under real working conditions in this paper. Firstly, the functional requirements of the valve-side bushing digital twin system are analyzed. Based on these requirements, the framework of digital twin system is constructed. Secondly, the implementation methods corresponding to the digital twin system framework are designed and developed. Finally, the application of a valve-side bushing digital twin system is used to demonstrate and validate the proposed method. This method provides a design concept for the practical application of digital twin systems and can offer practical and effective solutions for the digital transformation of power grids.

Key words: ultra-high voltage converter transformer valve-side bushing, power equipment, digital twin system, system integration

Yongsheng HE, Dan LUO, Zongxiang LU. Integration of Digital Twin Model System for Ultra-high Voltage Converter Transformer Valve-Side Bushing[J]. Electric Power, 2024, 57(6): 165-173.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202402076

https://www.electricpower.com.cn/EN/Y2024/V57/I6/165

Figures/Tables 17

Fig.1 Digital twin system architecture framework

Fig.2 Principle of data interface module

Fig.3 Principle of data transmission module

Fig.4 Physics field calculation module principle

Fig.5 Two kinds of visual display of twin models

Fig.6 Overall technical architecture of digital twin system

Fig.7 Converter transformer physical diagram

Fig.8 Transport model of MQTT

Table 1 Core packet field of IoT-Gateway

字段	字段名称	类型	备注
timestamp	时间戳	long	GMT UTC格林威治时间
messageId	消息ID	string
version	版本号	string	当前版本号
devices	数据主体	array/string
deviceId	子设备ID	string	一个网关下多个子设备ID不能相同
deviceState	子设备通信状态	0 or 1	0为通信失败，1为通信成功
deviceData	子设备数据	object	子设备数据包

Fig.9 Physical field calculation model flow

Fig.10 General model of valve side bushing

Table 2 Material parameters of valve side bushing model

套管部位	材料名称	电导率/(s·m^–1)	相对介电常数
中心导体	铜	5.8×10⁷	1.0
各层极板	油纸	1×10^–12	4.0
绝缘介质	SF₆	0	4.0
外护套	环氧树脂	1×10^–12	4.0
冷却介质	变压器油	1×10^–12	2.2

Fig.11 Nonlinear temperature field distribution of valve side bushing oil paper material

Fig.12 Digital twin visual design method based on WebGL protocol

Fig.13 Visual display of rheological valve side bushing and transformer

Fig.14 Valve side bushing multi-component display

Fig.15 Valve side bushing multi-component disassembly display

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