Outer Insulator Leakage Current Monitoring for Timely Maintenance
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Solution Overview
Problem
Existing methods for maintaining electrical components with external insulators are inefficient and unreliable, particularly for composite insulators with fluctuating hydrophobic properties, leading to inaccurate visual inspections and potential system failures due to contamination.
Innovation Solution
A method involving the continuous monitoring and analysis of leakage current data, using sensors to measure and store leakage current profiles, applying data processing to evaluate against predetermined conditions, and issuing maintenance instructions based on these evaluations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If visual inspection is used to monitor insulator condition, then maintenance can be performed periodically, but the inspection accuracy is particularly inaccurate for composite insulators due to fluctuating hydrophobic properties
Solution Approach 1:
The patent replaces manual visual inspection with automated electrical measurement systems. Leakage current sensors continuously monitor the insulator surface, converting the mechanical/visual inspection process into an electrical measurement system that objectively detects contamination levels without being affected by hydrophobic property fluctuations.
Solution Approach 2:
The patent introduces leakage current as an intermediary parameter to indirectly assess insulator contamination. Instead of directly observing the insulator surface condition, the system measures the electrical leakage current that results from contamination, providing an accurate indirect measurement of the insulator's actual condition.
2Reliability
If continuous monitoring of leakage current is implemented, then the reliability of component operation increases, but the device complexity increases due to additional sensors and data processing systems
Solution Approach 1:
The monitoring system is designed to autonomously evaluate measurement data against predetermined conditions and automatically generate maintenance instructions. The system serves itself by performing self-diagnosis and self-assessment, eliminating the need for complex manual evaluation protocols and reducing overall system complexity despite continuous monitoring.
Solution Approach 2:
The patent transforms the complex problem of continuous insulator condition monitoring into a simpler parameter-based evaluation system. By changing from multi-parameter visual assessment to single-parameter leakage current measurement with automated threshold comparison, the system achieves high reliability while maintaining manageable complexity through parameter simplification.
3Measurement precision
If leakage current measurement data is continuously stored and transmitted, then the assessment precision of insulator condition improves, but the quantity of data to be processed and transmitted increases
Solution Approach 1:
The patent applies partial action by selectively transmitting only those measurement data points that meet predetermined conditions or exceed threshold values. Instead of transmitting all continuous measurement data, the system transmits only relevant data that indicates actual contamination levels requiring attention, reducing data volume while maintaining assessment precision.
Solution Approach 2:
The system performs preliminary evaluation of measurement data locally before transmission by comparing data against predetermined conditions and thresholds. This preliminary filtering action occurs at the measurement point, pre-processing the data to identify only those measurements that require further attention or transmission, thereby reducing the quantity of data that needs to be transmitted and processed centrally.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and efficient maintenance by reducing the need for on-site assessments, increasing reliability and reducing the likelihood of system failures by continuously monitoring environmental conditions and insulator health.
Implementation Method 1
The measured leakage current can be evaluated with regard to long-term trends and short-term events
Data Source
AI summary
The invention relates to a method for maintaining an electrical component comprising an outer insulator. The method according to the invention is distinguished by the fact that a creepage current measured progressively on the outer insulator, that is to say a temporal profile of the creepage current in a sequence of individual measurement values, is stored in the form of measurement data, a check is made to establish whether the measurement data or variables derived therefrom satisfy a predetermined condition and, if the measurement data or the derived variables satisfy the predetermined condition, a maintenance instruction is initiated. The invention furthermore relates to a data processing system for carrying out the method according to the invention.