Power transformers are the main energy-consuming equipment for substations.According to the goal of"carbon peak,carbon neutralization"in China,it is of great significance to accurately calculate the carbon footprint of transformers and seek low-carbon optimization methods.A method for constructing a digital twin model of power transformer magnetic characteristics is proposed.Based on the three-dimensional electromagnetic time-harmonic field finite element analysis method,a three-dimensional model of SZ11-31.5MVA/66kV power transformer is established.The transformer loss map is obtained under fluctuating load condition,and the transformer digital twin model is constructed.The carbon footprint of the transformer is analyzed,the economic load coefficient of the transformer is determined,and the optimal economic operation mode of the substation is established.The low carbon optimization is carried out by installing magnetic shunt,and the carbon emission is reduced by 4.75％under rated condition.Through experimental calculation,the relative error between the model prediction and the actual simulation is less than 5％.This method can provide a scientific basis for the construction of substation with digital,low carbon and energy saving.
关键词
电力变压器/数字孪生/损耗/碳足迹/负载系数/低碳优化
Key words
power transformer/digital twin/loss/carbon footprint/load factor/low-carbon optimization
维普
万方数据