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FMEA-based cable fault data management and analysis method

A cable fault and data management technology, applied in the fault location, detecting faults by conductor type, measuring electricity, etc., can solve the problems of simple and rough fault data management, unutilized, data application cable operation and maintenance and asset management, etc., to avoid Study the effect of wasting resources, reducing professional level requirements, and simplifying the analysis process

Inactive Publication Date: 2019-10-22
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has not been applied to fault analysis, and most power companies currently use duty logs to record cable fault data, recording basic information such as voltage level, model, and commissioning time of faulty cables, and fault data management is relatively simple and rough , did not use relevant performance test data such as state quantity data that reflects the characteristics of the cable equipment itself, and did not fully apply the data to cable operation and maintenance and asset management

Method used

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  • FMEA-based cable fault data management and analysis method
  • FMEA-based cable fault data management and analysis method
  • FMEA-based cable fault data management and analysis method

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Embodiment 1

[0032] like Figure 1 to Figure 4 Shown is the embodiment of the FMEA-based high-voltage cable fault data management and analysis method of the present invention, comprising the following steps:

[0033] S10. Determine the cable fault data content, format and establish a cable fault database;

[0034] S20. Based on the cable fault database in step S10, classify the fault data according to the classification method of fault location and fault cause;

[0035] S30. Determine the failure incidence rate score, failure severity score and state quantity detection difficulty score of each type of failure data for the failure data in step S20, and calculate the risk priority index RPN of each type of failure state quantity, and establish a failure risk score table. ; The risk priority index RPN is the product of the failure rate, the severity of the failure and the degree of difficulty in state quantity detection;

[0036] S40. Obtain the fault category according to the fault data, q...

Embodiment 2

[0059] This embodiment is the second embodiment of the cable fault data management and analysis method based on FMEA. This embodiment is similar to Embodiment 1. In this embodiment, the fault location includes the cable body, intermediate joint, cable terminal, grounding system and cable channel, for each fault location, a different fault cause occurs.

[0060] For the cable body, the causes of failures caused by production design include: air gaps, impurities, and protrusions inside the main insulation, design defects in the corrugated aluminum sheath and buffer layer, and old cables without a longitudinal water-blocking layer; causes of failures caused by the environment include The causes of failures caused by outer sheath wear, gnawing and chemical corrosion of the outer sheath, external force damage include mechanical external force, and failure causes caused by abnormal voltage and current include operating overvoltage and overload. For intermediate joints, the causes of...

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Abstract

The invention relates to the technical field of cables, and more specifically, relates to an FMEA (Failure Modes and Effect Analysis)-based cable fault data management and analysis method. The methodmakes full use of various fault data. Related workers or researchers not only can understand the characteristics of fault data in general, but also can quickly understand the core content of each fault and screen out key fault types and key state quantities reflecting the health state of cables from a large number of fault data. The daily operation and maintenance personnel can combine the key state quantities extracted for different fault types and develop preventive test to prevent the occurrence of faults. The method contributes to the cable fault analysis work. The cause and development process of faults are analyzed from the perspective of key state quantities, and experiences are accumulated to guide the daily inspection work in the future. On the other hand, professional and technical researchers can correctly grasp the future research content and direction according to the selected key data, so as to meet the actual cable operation and maintenance needs and to avoid unnecessarywaste of research resources.

Description

technical field [0001] The technical field that the present invention relates to, more specifically, relates to a cable fault data management and analysis method based on FMEA. Background technique [0002] In recent years, with the rapid development and popularization of power cables, the increasingly prominent problem of cable faults poses new challenges to the normal operation of power networks and people's daily life. In order to achieve the development goals of reliability, safety, economy, high efficiency, environmental friendliness and safe use of the power grid, the problem of cable faults and reliability cannot be ignored. Fault data is an important basis for the study of cable faults. The fault data largely reflects the health status of the entire power grid. Effective analysis and management of fault data is of great significance to the operation and maintenance of power cables. [0003] The power cable fault detection technology is becoming more and more mature,...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/083G01R31/088
Inventor 廖雁群韦亦龙袁婧裴星宇徐小冰刘海康黄培专赵鹏勃胡欣欣冯甘雨周承科周文俊
Owner GUANGDONG POWER GRID CO LTD