Fiber Bragg Grating Anode for Transformer Corrosion Monitoring
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Solution Overview
Problem
The existing power grid infrastructure lacks effective distributed communications, monitoring, fault diagnostics, and automation, making it prone to wide-area breakdowns due to cascading effects from single faults, particularly due to corrosion and contamination issues in transformer tanks which are difficult to detect and predict.
Innovation Solution
The use of fiber Bragg gratings (FBGs) to monitor the corrosion state of corrosion control anodes within transformer tanks, allowing for real-time strain measurement and prediction of transformer failure through correlation with the tank's corrosion state, utilizing FBGs embedded in the anodes with epoxy sealing and temperature compensation to differentiate between temperature and corrosion-induced strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If traditional monitoring methods are used for transformer tanks, then the system is simple and easy to operate, but corrosion and contamination detection capability is insufficient
Solution Approach 1:
The patent replaces traditional mechanical/corrosion detection methods with optical fiber sensing technology. Fiber Bragg gratings (FBGs) are embedded in the transformer tank structure to detect strain changes caused by corrosion and contamination, enabling non-contact, real-time monitoring without mechanical intervention.
Solution Approach 2:
The patent uses fiber Bragg gratings as intermediary elements that convert physical corrosion-induced strain into optical signal changes. The FBGs act as mediators between the corrosive environment and the monitoring system, translating mechanical deformation into measurable wavelength shifts that indicate corrosion progression.
2Reliability
If real-time corrosion monitoring is implemented, then reliability of power grid is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a multi-functional monitoring system where fiber Bragg gratings simultaneously detect multiple parameters including corrosion-induced strain, temperature changes, and structural integrity. This universal sensing approach consolidates multiple monitoring functions into a single integrated system, improving reliability without proportionally increasing complexity.
Solution Approach 2:
The patent establishes a feedback mechanism where real-time data from embedded FBGs is continuously monitored and analyzed. The system provides ongoing feedback on corrosion progression, enabling predictive maintenance decisions that prevent catastrophic failures and maintain power grid reliability through proactive intervention.
3Measurement precision
If FBGs are embedded in anodes for corrosion monitoring, then measurement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates fiber Bragg gratings during the initial anode manufacturing process rather than installing them later. The FBGs are embedded into the anode structure during casting or fabrication, which simplifies the overall manufacturing workflow and avoids complex post-installation procedures while maintaining high measurement precision.
Solution Approach 2:
The patent nests the fiber Bragg grating sensors within the anode structure itself. The FBGs are embedded inside the anode material during manufacturing, creating a nested configuration where the sensing element is integrated within the monitored structure, enabling direct measurement of corrosion-induced strain with high precision.
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 remote, real-time monitoring of corrosion and contamination on transformer tank exteriors, predicting potential failures and allowing for timely maintenance to prevent major breakdowns, thereby enhancing the reliability and sustainability of power grid systems.
Implementation Method 1
fiber Bragg gratings (FBGs) to monitor the corrosion state of corrosion control anodes within transformer tanks, allowing for real-time strain measurement
Implementation Method 2
utilizing FBGs embedded in the anodes with epoxy sealing and temperature compensation to differentiate between temperature and corrosion-induced strain
Implementation Method 3
utilizing FBGs embedded in the anodes with epoxy sealing
Implementation Method 4
temperature compensation to differentiate between temperature and corrosion-induced strain
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
A corrosion monitoring system includes one or more objects coupled to respective portions of a transformer tank. The one or more objects are configured to corrode before the respective portions of the transformer tank. At least one optical sensor is coupled to each of the objects. The at least one optical sensor has an optical output that changes in response to strain of the object. An analyzer is coupled to the at least one optical sensor. The analyzer is configured to perform one or more of detecting and predicting corrosion of the transformer tank based on the output of the at least one optical sensor.