A three-layer modeling method from collection points to device containers then to industrial applications is developed to access more and more new-type device data to the power monitoring system. Firstly, collection point models in different collection types are set up. Then, the incidence relations between relative devices and collection points are set up. Finally, the industrial model of data according to industrial application requirements are set up and the unification with the common information model （CIM） is realized. The efficiency and security of the data model is ensured using a special storage and checkout method. With this method, there is no need of model modification when accessing new-type device data for the power monitoring system of new energy sources, improving the adaptability and expansibility of the system.%为适应越来越多的新型设备数据接入电力监控系统，提出了从采集点到设备容器再到行业应用的3层建模设计方法。首先，按不同采集类型，建立了采集点模型；然后，建立了设备与各类采集点的关联关系；最后，按照行业应用要求，建立了数据的行业模型，实现了与公共信息模型的统一，并通过特定的存储与校验方法，保证了数据模型的高效性和安全性。采用该方法，电力监控系统在考虑各类新能源设备接入时无需进行模型修改，提高了系统的适应性和扩展性。
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