Optical Hydrogen Sensor for Transformer Monitoring
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Solution Overview
Problem
Existing sensor systems for monitoring hydrogen levels in insulation liquids of electrical equipment are complex, costly, and require frequent calibration, with limited reliability and real-time capabilities, making it difficult to detect faults and degradation in a timely manner.
Innovation Solution
A sensor assembly comprising a light source, a hydrogen detection section with a hydrogen-sensitive layer that changes optical response based on hydrogen concentration, and an output section providing binary signals for hydrogen levels above or below a threshold, allowing for simple, cost-effective, and reliable monitoring of hydrogen content in insulation liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semiconductor sensors, thermal-conductivity analyzers, pellistors or fuel cell sensors are used for online hydrogen monitoring, then real-time hydrogen concentration measurement is achieved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic sensing systems (semiconductor sensors, thermal-conductivity analyzers, pellistors, fuel cell sensors) with a simple optical sensor system. The optical sensor uses light transmission through a window to detect hydrogen concentration changes, eliminating the need for complex electronic components and gas separation systems while maintaining real-time monitoring capability.
Solution Approach 2:
The patent extracts only the essential function of hydrogen detection from complex sensor systems. By using a simple optical window and light source, the system isolates the core detection mechanism from unnecessary complexity, achieving real-time monitoring with minimal components.
2Reliability
If complex online sensor systems are deployed for continuous monitoring, then real-time data is obtained, but maintenance requirements and costs increase
Solution Approach 1:
The optical sensor system replaces complex electronic sensing mechanisms with a simple light transmission setup. This substitution eliminates moving parts, complex electronics, and fragile components that require maintenance, resulting in a system that can operate continuously with minimal intervention.
Solution Approach 2:
The optical sensor system is designed to be inherently stable and self-sustaining. The light source and optical window have no moving parts and require no calibration or frequent maintenance, allowing the system to service itself over extended periods without human intervention.
3Measurement precision
If traditional online sensors are used for hydrogen detection, then detailed hydrogen concentration values are obtained, but calibration complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic sensing and calibration systems with a simple optical transmission system. The light source emits light through a window, and hydrogen concentration is determined by optical properties changes, eliminating the need for complex calibration procedures associated with electronic sensors.
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 reliable, real-time monitoring of hydrogen levels with minimal calibration requirements, reducing maintenance costs and improving fault detection in electrical equipment, particularly in transformers.
Implementation Method 1
a first hydrogen sensitive layer that changes an optical response with respect to received light depending on whether an amount of hydrogen at the first hydrogen sensitive layer is above or below a first threshold
Data Source
AI summary
A sensor assembly is disclosed for sensing a status condition of a liquid-filled electrical equipment such as a transformer. The sensor assembly can include a light source; a first hydrogen detection section, the first hydrogen detection section being optically coupled to the light source for receiving light from the light source, wherein the first hydrogen detection section has a first hydrogen sensitive layer that changes an optical response with respect to the received light depending on whether an amount of hydrogen at the first hydrogen sensitive layer is above or below a first threshold; and a first output section optically coupled to the first hydrogen detection section for receiving light having interacted with the first hydrogen sensitive layer such that the received light depends on the optical response of the first hydrogen sensitive layer.