针对目前我国相当一部分地区电网的管理未摆脱手工计算的现状，研制了基于图形界面的电网计算分析工具软件。可视化、部分计算过程的自动化成为此软件的重要特色，并实现了智能程序与算法程序的结合。该软件已在保定和太原地区电网得到了较长时间的应用。

本文介绍了一个已投入试运行的地区电网继电保护定值在线校验智能系统。根据地区电网的特点，采用面向对象和链表等指针型数据结构对电网进行表示和数据管理，提出了基于矩阵模型的厂站实时结线分析新方法；总结归纳了地区电网继电保护定值的校验规则,提出了不规则线路的保护灵敏度校验和保护配合校验的策略。以某地区电网为实验对象，对其相间距离、接地距离、零序电流保护的灵敏性和选择性进行了校验。

The framework of an assessment system on transformers' condition is proposed in this paper through mainly using data mining techniques. Moreover, a warehouse is used to collect transformers'testing data, and a multi-agent system is used to design the framework of the software. The present framework is open and flexible, so the objective system is easy to be developed and maintained. The system can support transformers' condition-based maintenance to reduce electric utility's cost. The condition of a transformer depends on its design, present and historical data relating to its installation environment, load amounts, being switched number and so on. Usually the off-line testing results, operational data, fault records and weather conditions have been stored in different systems, so finding an effective method to utilize all this information for condition assessment is difficult. Therefore, a data warehouse has been used to integrate all of the above data, and some data mining techniques have been used to find the pattern and trend of the condition of a transformer. Then whether it is healthy can be determined. In order to make the system open and flexible, Open Agent Architecture (OAA) is employed to compose the multiagent system. Seven application agents are designed to evaluate transformers' conditions synthetically. The Grey correlation method, grey theory prediction model GM (1,1), Bayesian network classifier and Bayesian network are employed in the agents.

The conventional graph editing of one-line substation diagrams for a graphical user interface is time-consuming and needs considerable effort. A method for automatic generation of the substation diagrams is described in this paper. In this method, artificial intelligence (AI) frames are adopted for the representation of substations and their network, some expert rules on the layout and drawing of substation buses are accumulated and summarized, and AI rule-based inference techniques are used for branch analysis on different types of buses and drawing of the buses and their branches. A vertical coordinates conversion relationship is obtained to narrow the testing of substation diagram components’ vertical layout. The method has been programmed and applied to two power system analysis programs, one of which is undergoing field test in a transmission system for real time fault diagnosis in northern China.