Abstract
The requirement for reliable electrical energy supply increases continuously because of its vital role in our lives. However, events due to various factors in the power grid can cause energy supply to be interrupted. One of these factors is human error and thus human reliability analysis is a serious element in the industry. The first step is to identify the roots of human error, on which there has been limited research in this area. In this paper, the potential and actual causes of human error in maintenance teams of power transmission system protection are identified and predicted within a framework of human factors analysis and classification system method. Then, human error factors are ranked to help improve human reliability. The proposed method is implemented in the Fars Electricity Maintenance Company.
Highlights
Increase in electrical energy consumption requires more stable and reliable power systems, and any interruption or disturbance in the supply of modern sensitive loads may lead to high cost.According to the annual reports from NERC [1] and In the Iran Grid Management Company [2], about 70% of electrical outages are due to equipment failures or problems in power grids, and about 9 to 17% of the outages are rooted in human error
Reference [16] investigates human reliability during events that occurred in the Chinese power system, and the human error factors corresponding to each event are identified using the Cognitive Reliability and Error Analysis Method (CREAM) method
The research presented in [18] introduces “motivation” and “competence” as the most important human factors influencing the performance of power transmission maintenance personnel
Summary
Increase in electrical energy consumption requires more stable and reliable power systems, and any interruption or disturbance in the supply of modern sensitive loads may lead to high cost.According to the annual reports from NERC [1] and In the Iran Grid Management Company [2], about 70% of electrical outages are due to equipment failures or problems in power grids, and about 9 to 17% of the outages are rooted in human error. Surveys show that human error can affect the safety of personnel and equipment, as well as reduce the reliability of the network. It can affect the income of electricity companies through loss of energy transmission and electricity market. Colombia’s blackout in 2007 left 41 million people without power for 4.5 h This was caused by a human error during the maintenance of a protective device in a 230 kV substation. In [19], fatigue, knowledge, experience, and time pressure are recognized as the most important human factors, while [20] shows that older operators’ unwillingness to use personal safety instructions or equipment due to over-reliance on their experience increases error. In [22], a study on job stress in human resource management is conducted and the results show that psychological factors are very important and effective
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