Risk evaluation based cable overhaul strategy method

Abstract

The invention provides a risk evaluation based cable overhaul strategy method. The method specifically comprises the steps of proposing a risk evaluation based cable line overhaul strategy according to the overhaul characteristics of a cable line; considering the portability of the fault of the cable line and the severity of the fault consequence; evaluating a cable line unit according to the real-time information; calculating the healthy indexes of the whole cable line by the analytic hierarchy process; then calculating the portability of the fault of the cable line; determining the comprehensive risk of the cable line according to the assets loss risk and operation loss risk of the cable line; deciding the cable line overhaul strategy according to the risk grade of the comprehensive risk of the cable line. According to the method, the risk evaluation is further performed for the cable line based on the cable line state evaluation; in addition, the cable line overhaul strategy is prepared according to the ALARP rule, and therefore, a new concept is provided for the overhaul of the cable line.

Description

technical field [0001] The invention belongs to the field of power system equipment maintenance, and in particular relates to a risk assessment-based cable maintenance strategy method. Background technique [0002] As an important component of the distribution network, cable lines supply power directly to users. The maintenance plan of cable lines is directly related to the interests of power supply companies and users. Reasonable arrangement of cable line maintenance plans is of great significance. At present, my country's cable line maintenance is in the parallel stage of regular maintenance and condition maintenance. Regular maintenance is based on preventive test procedures, which is likely to cause "surplus maintenance" or "disrepair"; condition maintenance measures cable lines through regular inspections, inspections, tests, etc. According to the actual situation of the state quantities, the cable line maintenance strategy is formulated according to these state quantiti...

AI Technical Summary

Problems solved by technology

[0003] However, the current guidelines for the implementation of condition-based maintenance of cable lines are relatively rough. The manual scoring method is used to determine the maintenance strategy based on the comparison of the monitored cable line state quantity with the critical value, directly jumping from the data layer to the decision-making layer, and only considering the individual cable line Performance, lack of consideration of the impact of cable line maintenance on power grid operation

For a long time, power supply companies have only considered the impact of equipment failures when formulating maintenance plans, making maintenance decisions too conservative

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