(2) There is something wrong with the misoperation locking device. For example, some five-prevention locking devices fail to achieve the purpose of "five-prevention" because of imperfect design layout, problems left over from installation and debugging, and improper proofreading of operating procedures. Even some "five-prevention" locking devices have uneven functions, and the operation and maintenance management system is not implemented effectively, which makes the "five-prevention" locking devices lose their due anti-misoperation locking function. There are also poor quality anti-misoperation locking devices, which are often forcibly unlocked, causing confusion in operation. However, the field operators' learning and mastering of the "five-prevention" locking device can't keep up with the development of many innovative requirements and can't play the role of the "five-prevention" locking device quickly.
(3) Human error. Do not check the electricity, do not check the electricity space, it will be perfunctory, resulting in a live grounding line; The guardian gives up the guardianship duty or the operator leaves the guardianship, goes to the wrong section and looks at the wrong equipment; Accept the scheduling command is not repeated, resulting in false hearing; The device failed to execute the double title as required; Answering calls unrelated to the operation during the operation; Operators and guardians go to work with contradictions, which affects the safety of operation.
(4) others. Misoperation accidents are also closely related to people's physiological reasons, psychological state, emotional influence, concentration, equipment state, management level, work site environment and so on.
2 How to prevent electrical misoperation accidents
(1) The dangerous points of misoperation accidents must be determined in advance according to the principle and characteristics of electric switching operation, and carefully studied, analyzed and monitored.
(2) Operation management personnel should fill in the operation ticket accurately.
(3) Strengthen daily operation supervision.
(4) We must follow the physiological and psychological laws of human beings and arrange human resources reasonably.
(5) Strengthen the management of microcomputer "five-prevention" locking device in substation to prevent misoperation accidents caused by misunderstanding of lock function.
(6) Avoid and control dangerous points. According to the electrical circuit and equipment status of each substation, the operation risk degree is comprehensively analyzed, and the operation mode with less dangerous points and low accident probability is selected.