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人工神经网络（ＡＮＮ）和专家系统（ＥＳ）的结合是智能系统研究的发展方向。本文对ＡＮＮ和ＥＳ结合用于电力系统故障诊断问题进行了研究，提出一种新的电力系统故障诊断方法。该方法综合了ＥＳ和ＡＮＮ各自的优点，充分利用ＥＳ的推理能力和ＡＮＮ的学习能力，由ＥＳ根据故障报警信息搜索电网数据库，提出故障假设，再由ＡＮＮ对故障假设进行诊断。该方法教授给ＡＮＮ的知识是电网通用的故障判断知识，具有较强的能用性。研究表明ＡＮＮ和ＥＳ结合用于电网故障诊断是非常有效的。
The combination of artificial neural network (ANN) and expert system (ES) is the development direction of intelligent system. In this paper, ANN and ES are combined to be used in power system fault diagnosis, and a new fault diagnosis method of power system is proposed. The method combines the advantages of ES and ANN, and makes full use of ES reasoning ability and ANN learning ability. ES searches the grid database according to the fault alarm information, puts forward the fault hypothesis, and then diagnoses the fault hypothesis by ANN. The knowledge taught by this method to ANN is general knowledge of fault judgment in power grid and has strong usability. Research shows that the combination of ANN and ES is very effective for fault diagnosis of power networks.