Gas Leak Detection Device Using Current-Based Temperature Correction
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Solution Overview
Problem
Existing gas leak detection methods for gas insulation switching devices fail to accurately account for temperature changes caused by energizing conditions, leading to errors in gas pressure correction and incomplete consideration of internal temperature uniformity, especially in devices with multiple gas pressure containers.
Innovation Solution
A gas leak detection device that includes pressure and temperature sensors, a current data capturing section, a learning section to establish correlations between gas temperature and external temperature, and a diagnosis section to correct gas pressure values to a reference temperature, enabling accurate detection of gas leaks by considering energizing conditions and internal temperature distributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gas pressure is corrected using external temperature only, then the detection system is simple, but the correction accuracy is insufficient due to not considering energizing condition effects
Solution Approach 1:
The system performs preliminary learning to establish the relationship between energizing conditions and internal temperature before actual gas leak detection. During a learning period, the device captures current values, external temperatures, and gas pressures to build a database that models how energizing conditions affect internal temperature. This preliminary action enables accurate correction without requiring direct internal temperature sensors.
Solution Approach 2:
The invention uses external temperature as an intermediary to infer internal temperature changes caused by energizing conditions. Instead of directly measuring internal temperature, the system measures external temperature and uses the pre-established learning data to determine the corresponding internal temperature effect. This intermediary approach avoids complex internal sensing while maintaining accuracy.
2Measurement precision
If temperature sensors are installed inside all gas pressure containers, then internal temperature measurement is accurate, but the cost and device complexity increase significantly
Solution Approach 1:
The system creates a virtual model of internal temperature based on external temperature measurements and learning data, rather than physically installing sensors inside each container. The learning section builds a computational copy of the thermal behavior that can predict internal temperature conditions using only external measurements, eliminating the need for intrusive internal sensors.
Solution Approach 2:
External temperature sensors serve multiple functions: they measure actual external temperature for environmental correction and simultaneously serve as the basis for inferring internal temperature effects through the learning model. This multi-functionality eliminates the need for separate internal temperature measurement systems.
3Ease of operation
If gas pressure correction does not consider energizing conditions, then the system is simpler to operate, but the gas leak detection accuracy deteriorates
Solution Approach 1:
The device automatically performs learning and correction operations without requiring manual intervention. The learning section autonomously collects data during normal operation, builds the thermal model, and the diagnosis section automatically applies corrections using current values and external temperature. The system serves itself by continuously improving its own accuracy through automatic learning and correction.
Solution Approach 2:
The system uses feedback from measured current values and external temperature to continuously correct gas pressure readings. The learning data establishes the feedback relationship between energizing conditions and internal temperature, enabling automatic compensation that improves detection accuracy while maintaining operational simplicity.
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
The solution provides high-accuracy detection of insulating gas leaks, such as SF6, by correcting gas pressure values based on energizing conditions and internal temperature variations, reducing errors associated with external temperature measurements and temperature non-uniformity within the gas pressure containers.
Implementation Method 1
a pressure sensor that measures a gas pressure value inside the gas pressure container
Implementation Method 2
a temperature sensor that measures an external temperature of the gas pressure container
Implementation Method 3
the gas pressure is largely changed due to a gas temperature
Implementation Method 4
an amount of generation of heat of the conductor is changed by changing the energizing condition (energizing current value) to the gas insulation switching device
Data Source
AI summary
A gas leak detection device includes a learning section, which has a correlation between a gas temperature inside gas pressure containers and a surface temperature of the gas pressure containers in a learning period corresponding to a current value flowing in the conductor, to make database, and a diagnosis section, which extracts a gas temperature corresponding to the measured current value and the surface temperature from the learning section in a diagnosis period, corrects a gas pressure value corresponding to an arbitrary surface temperature to a gas pressure value of a reference temperature using the extracted gas temperature, and detects a leak of the insulating gas based on the corrected gas pressure value.