Gas Density Relay Online Verification for SF6 Switchgear Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-voltage electrical equipment with SF6 gas faces operational safety risks due to gas density and moisture content issues, leading to insulation loss, corrosion, and potential flashovers, necessitating regular testing but lacking effective online monitoring solutions for unattended substations.
Innovation Solution
An electrical system with an online sampling check function, incorporating a gas density relay, temperature regulation mechanism, gas density detection sensor, and intelligent control unit for remote monitoring and control, allowing for continuous monitoring and alarm/blocking signal sampling without physical disassembly, ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If regular offline testing of gas density and moisture content is performed, then operational safety is ensured, but operational efficiency decreases and maintenance costs increase due to equipment shutdown requirements
Solution Approach 1:
The system performs preliminary monitoring and detection of gas density and moisture content through online sensors, allowing the equipment to maintain normal operation while safety parameters are continuously tracked. This preliminary action prevents the need for shutdown testing by maintaining parameters within safe ranges through continuous observation.
Solution Approach 2:
The patent replaces mechanical offline testing procedures with an online electronic monitoring system that uses sensors and signal processing to continuously detect gas density and moisture content. This substitution eliminates the need for physical disassembly and shutdown while maintaining safety monitoring capabilities.
2Measurement precision
If offline testing procedures are implemented, then accurate gas density and moisture content measurements are obtained, but equipment downtime increases
Solution Approach 1:
The online monitoring system enables continuous measurement of gas density and moisture content without interruption to equipment operation. The useful action of monitoring continues uninterrupted, providing continuous data while the equipment remains operational, thus eliminating downtime associated with periodic offline testing.
Solution Approach 2:
The patent introduces intermediary online detection sensors and signal processing units that mediate between the SF6 gas and the monitoring system. These intermediaries enable accurate measurement of gas parameters without requiring direct contact or disassembly of the equipment, thus maintaining measurement accuracy while avoiding downtime.
3Reliability
If manual testing and maintenance procedures are used, then comprehensive inspection is achieved, but labor costs and operational complexity increase
Solution Approach 1:
The system performs self-monitoring and self-diagnosis through automated online detection of gas density and moisture content. The equipment serves itself by continuously checking its own operational parameters and triggering alarms when thresholds are exceeded, eliminating the need for manual inspection while maintaining comprehensive monitoring coverage.
Solution Approach 2:
The patent implements feedback mechanisms where the online monitoring system continuously provides information about gas parameters to the control system. This feedback loop enables automated decision-making and alarm generation, reducing operational complexity by eliminating manual interpretation and response while maintaining comprehensive inspection capabilities.
4Quantity of substance
If traditional monitoring systems are deployed, then basic gas density detection is provided, but online moisture content monitoring and contact signal verification are insufficient
Solution Approach 1:
The patent merges multiple monitoring functions into a single integrated online system that simultaneously detects gas density, moisture content, and contact signal status. By combining these previously separate monitoring capabilities into one unified system, the patent achieves comprehensive monitoring coverage while maintaining or improving measurement precision through coordinated sensing and processing.
Solution Approach 2:
The online monitoring system is designed with multi-functionality, serving as a universal platform that performs gas density detection, moisture content monitoring, and contact signal verification through integrated sensors and processing units. This universal system replaces multiple specialized devices, expanding monitoring coverage while maintaining high measurement precision across all parameters.
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, efficient, and cost-effective online monitoring and maintenance of SF6 gas density and moisture levels, reducing operational risks and maintenance costs while improving the reliability of power grids.
Implementation Method 1
a temperature regulating mechanism, which is a regulating mechanism capable of regulating temperature and configured to regulate temperature rise and fall of a temperature compensation element of the gas density relay body
Implementation Method 2
a gas density detection sensor, which is communicated with the gas density relay
Implementation Method 3
the intelligent control unit... is configured to complete control of the temperature regulating mechanism, pressure value acquisition, temperature value acquisition and/or gas density value acquisition
Data Source
AI summary
The application provides an electrical system with online sampling and check function and its check method for high-voltage and medium-voltage electrical equipment, including electrical equipment, gas density relay, gas density sensor, temperature regulation mechanism, online check contact signal sampling unit and intelligent control unit. The temperature rise and fall of the temperature compensation element of the gas density relay is regulated through the temperature regulation mechanism to enable the contact action of the gas density relay of electrical equipment. The contact action is transmitted to the intelligent control unit through the online check contact signal sampling unit. The intelligent control unit detects the alarm and/or blocking contact signal operating value and/or return value according to the density value of the contact action; the check of the gas density relay can be completed without maintenance personnel on site, which greatly improves the reliability of the power grid and the work efficiency, and reduces the O&M cost. At the same time, it also realizes the mutual self-inspection between gas density relay and gas density sensor, and further realizes the maintenance-free.