应用全寿命周期成本管理理论,针对常规变电站和数字式变电站设备安装和使用的不同比照,通过建立数字式变电站全寿命周期成本估算模型来计算电子式互感器的全寿命周期成本。实践表明,变电站配置电子式互感器提高了变电站的自动化水平,在基建阶段减少一次投资成本,在整个全寿命周期内可节省运行成本。 The life-cycle cost management theory is applied to calculate the life-cycle cost of the electronic transformer by setting up the life-cycle cost estimation model of the digital substation according to the different comparison of installation and use of conventional substations and digital substation equipment. Practice shows that the substation configuration of electronic transformers improves the automation level of the substation, reduces the investment cost in the infrastructure stage and saves the running cost in the whole life cycle.