本文基于面向对象技术，建立了一个既符合电力系统实际情况，又方便计算和扩展的电力系统对象模型。

Based on the object oriented technology, the paper has founded a power system object model which accords with the characteristic and is also suitable for the calculation and extension.

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本文通过利用UML方法对系统进行分析和设计来建立对象模型，借助系统对象模型来实现面向对象数据库的设计。

This paper analyses the technique of establishing the object model for application system by using the UML method and of designing database which is realized by making use of the object model.

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然后为每个系统创建对象模型和序列图。

Then an object model and sequence diagrams were created for each system.

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