Risk evaluation based cable overhaul strategy method

A technology of risk assessment and maintenance strategy, applied in the direction of instruments, data processing applications, resources, etc., can solve the problems of conservative maintenance decision-making, lack of cable line maintenance impact on power grid operation, and only considering the individual performance of cable lines, etc.

Active Publication Date: 2015-05-13
江西汇能电力工程技术有限公司
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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 dec

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Embodiment Construction

[0051] In order to describe the present invention more conveniently, the method described in the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] Such as figure 1 As shown, the steps of the cable maintenance strategy method based on risk assessment are as follows:

[0053]The first step is status assessment. According to the "10(6)-500kV Cable Line State Evaluation Guidelines", the state evaluation of each component of the cable line is carried out according to the original data of the cable line, operation data, maintenance data and other data. It is obtained by adding weight coefficients;

[0054] a) Calculation of cable failure probability

[0055] The failure rate of the cable line is related to the health status HI of the cable line, and the relationship between the two is shown in formula (1) and figure 2 Shown:

[0056] P=K×e -C×HI (14)

[0057] In the formula, P is the failur...

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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...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06
Inventor 张忠会谢义苗万海翔刘故帅
Owner 江西汇能电力工程技术有限公司
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