GIS Gas Monitoring with Statistical Jump Detection for Leak Accuracy
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Solution Overview
Problem
Existing gas monitoring systems in gas-insulated switchgear (GIS) suffer from false alarms due to rapid changes in gas pressure and density caused by gas handling operations or load changes, leading to inaccurate leakage rate calculations.
Innovation Solution
A gas monitoring system with a sensor and computer unit that performs statistical step and change detection to identify sudden changes in gas properties, allowing for automatic adjustment of leakage rate calculations by resetting or offsetting measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gas handling operations or load changes occur in GIS, then gas pressure and density change rapidly, but this leads to false alarms and inaccurate leakage rate calculations
Solution Approach 1:
The system performs preliminary detection of jumps and changes in gas properties before they affect leakage rate calculations. By detecting sudden changes in pressure or density and resetting the calculation accordingly, the system prevents these transient changes from causing false alarms, thus maintaining measurement precision during gas handling operations
Solution Approach 2:
The system continuously monitors gas properties and uses feedback from jump/change detection to dynamically adjust leakage rate calculations. When a jump or change is detected, the system resets the calculation, creating a closed-loop control mechanism that maintains accuracy despite rapid gas property changes during operations
2Measurement precision
If statistical analysis of multiple data points is used to improve leakage rate calculation accuracy, then calculation precision improves, but the system becomes sensitive to sudden changes causing false alarms
Solution Approach 1:
The system performs preliminary detection of jumps and changes in gas properties before they affect leakage rate calculations. By detecting sudden changes in pressure or density and resetting the calculation accordingly, the system prevents these transient changes from causing false alarms, thus maintaining measurement precision during gas handling operations
Solution Approach 2:
The system continuously monitors gas properties and uses feedback from jump/change detection to dynamically adjust leakage rate calculations. When a jump or change is detected, the system resets the calculation, creating a closed-loop control mechanism that maintains accuracy despite rapid gas property changes during operations
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
Reduces or eliminates false alarms by accurately adjusting leakage rate calculations in response to gas handling or load-induced changes, ensuring reliable operation of GIS.
Implementation Method 1
a sensor operatively connected to the chamber and adapted to measure a physical property of the insulating gas in the respective chamber over time
Data Source
AI summary
A gas monitoring system includesa gas-insulated switchgear including a chamber filled with an insulating gas surrounding a high or medium voltage component,a sensor operatively connected to the chamber and adapted to measure a physical property of the insulating gas in the chamber over time, anda computer unit adapted to perform on the sensor measurements a statistical step detection for determining if a jump has occurred and/or a statistical change detection for determining if a change has occurred, wherebythe statistical step and/or change detection includes identifying an expected range based on past sensor measurements and checking if a current sensor measurement is outside of the expected range.