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A power distribution system equipment state maintenance decision-making method based on risk assessment

A technology of power distribution equipment and power distribution system, applied in the direction of information technology support systems, instruments, data processing applications, etc., can solve the problem of not considering the difference of losses, not considering the impact of the overall safety of the grid, and lack of quantitative decision-making methods, etc. question

Inactive Publication Date: 2019-04-02
TIANJIN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

When defining risk, it does not take into account the different losses caused by equipment failures of different severity
When calculating the risk level, historical data is generally used to predict the risk level of equipment at present, which is not real-time. In addition, most of them only conduct risk assessment on a single equipment, without considering the impact of a single equipment failure on the overall security of the grid
When using the risk assessment results to determine the operation and maintenance strategy, it can only qualitatively reflect the operation and maintenance strategy of power distribution equipment under specific working conditions, and lacks a universally applicable quantitative decision-making method

Method used

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  • A power distribution system equipment state maintenance decision-making method based on risk assessment
  • A power distribution system equipment state maintenance decision-making method based on risk assessment
  • A power distribution system equipment state maintenance decision-making method based on risk assessment

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specific Embodiment

[0093] Below in conjunction with example the present invention is described in further detail.

[0094] Using the method of the present invention to figure 2 Analyze the situation of feeder F4. F4 includes 10 transformers (T1-T10), 2 switchgears (C1-C2), 10 overhead lines (L1-L10) and 10 user loads (LP1-LP10). Assuming that the circuit breaker works 100% reliably, for feeder F4, the basic information of various power distribution equipment is shown in Table 1, and the basic information of load points is shown in Table 2.

[0095] Table 1 Basic information of F4 feeder distribution equipment

[0096]

[0097] In Table 1, L is the length of the faulty line (in km), where the length of L1-L5 is 1 km, and the length of L6-L10 is 0.5 km.

[0098] Table 2 Load point data

[0099]

[0100] Step 1), collect historical work data and real-time operating status data of power distribution equipment, and calculate the real-time health index of each power distribution equipment a...

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Abstract

The invention discloses a power distribution system equipment state maintenance decision-making method based on risk assessment. The method comprises the steps of collecting operation data of power distribution system equipment for state evaluation and risk evaluation, and finally formulating differential operation and maintenance strategies. The method has the advantages that the equipment risk cost is determined from the two aspects of the equipment health degree and the importance degree. When the health degree index is calculated, real-time data and historical data are comprehensively considered, and the defect of poor real-time performance in traditional risk assessment is overcome; when the importance degree is calculated, the importance degree of the equipment is measured from the perspective that the influence of a single equipment fault on the whole power distribution system is not limited to the consideration of the self loss of the single equipment fault. Furthermore, the operation and maintenance sequence and the operation and maintenance mode are determined on the basis of the relative risk cost, so that the establishment of the operation and maintenance strategy is simple, economical and visual, the advantage of differential operation and maintenance is embodied, and scientific reference can be provided for the establishment of the operation and maintenance strategy of the power distribution equipment.

Description

technical field [0001] The invention belongs to the technical field of operation and maintenance of power distribution equipment, in particular to a risk assessment-based decision-making method for condition maintenance of power distribution system equipment. Background technique [0002] The good operation and maintenance of distribution network equipment is a basic work to ensure the health of distribution network assets and realize reliable operation of distribution network. It is related to the continuous and reliable power consumption of the majority of power users and the safe and reliable operation of the power grid. In recent years, with the rapid increase of power distribution equipment, the distribution network structure has become increasingly complex, the workload of grass-roots operation and maintenance has continued to increase, and the cost of operation and maintenance has also increased. The traditional regular operation and maintenance mode can no longer meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q10/00G06Q50/06
CPCG06Q10/0635G06Q10/0637G06Q10/20G06Q50/06Y04S10/50
Inventor 罗凤章刘跃张天宇
Owner TIANJIN UNIV
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