The probability of the correct performance of the activities required by the system over a given period of time and the working conditions specified by a person is called human reliability. Human reliability is seen in all industries, and it can affect the performance of the system or results in unpleasant events. In electrical power systems, the human errors of maintenance groups are one of the most important factors in the failure of electrical equipment. In this paper, a new method based on the combination of Fault Tree Analysis (FTA) and Human Factors Analysis and Classification System is presented in order to calculate and analyze the human reliability in electrical power systems. In this method, the basic causes (roots) of human errors are comprehensively identified in all aspects. The relationship among the causing roots, and also between the human errors and these roots are established logically. Finally, human reliability can calculate easily. Since the data available in this study are mostly linguistic, the fuzzy logic is used to eliminate the inaccuracy of the evaluation and to improve the FTA technique. The validity and the accuracy of the presented method are assessed by the results of human reliability analysis in Fars Electricity Maintenance Contractor Company as a case study. Results show the accuracy of the proposed method for human reliability analyses of maintenance groups in power transmission grids.

在给定的时间和人指定的工作条件内，系统要求的活动正确执行的概率称为人的可靠性。在所有行业中都可以看到人为可靠性，它会影响系统的性能或导致不愉快的事件。在电力系统中，维修组的人为失误是造成电力设备故障的最重要因素之一。本文提出了一种基于故障树分析（FTA）和人因分析与分类系统相结合的新方法，以计算和分析电力系统中的人为可靠性。在该方法中，从各个方面全面识别人为错误的基本原因（根源）。成因之间的关系，并且在人为错误和这些根源之间也是合乎逻辑的。最后，人的可靠性可以很容易地计算出来。由于本研究中可用的数据主要是语言数据，因此使用模糊逻辑来消除评估的不准确性并改进 FTA 技术。以 Fars Electricity Maintenance Contractor Company 的人员可靠性分析结果为例，对所提出方法的有效性和准确性进行了评估。结果表明所提出的方法对输电网维修组人员可靠性分析的准确性。模糊逻辑用于消除评估的不准确性并改进 FTA 技术。以 Fars Electricity Maintenance Contractor Company 的人员可靠性分析结果为例，对所提出方法的有效性和准确性进行了评估。结果表明所提出的方法对输电网维修组人员可靠性分析的准确性。模糊逻辑用于消除评估的不准确性并改进 FTA 技术。以 Fars Electricity Maintenance Contractor Company 的人员可靠性分析结果为例，对所提出方法的有效性和准确性进行了评估。结果表明所提出的方法对输电网维修组人员可靠性分析的准确性。