Wireless Gas Pressure Monitoring for High-Voltage Switchgear
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Solution Overview
Problem
Existing pressure monitoring systems in medium and high voltage electrical switchgear are bulky, require wired connections, and are not energy efficient, posing space and operational challenges, especially with the transition from SF6 to alternative gases that necessitate higher filling pressures.
Innovation Solution
A wireless, bidirectional data transmission system using MEMS-based sensors integrated in a single housing with a battery-powered unit for continuous pressure and temperature monitoring, allowing remote access and reducing physical footprint, with an adapter for existing pressure gauges to minimize installation impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard pressure gauges and wired monitoring systems are used, then measurement reliability is ensured, but device complexity and physical footprint increase
Solution Approach 1:
The patent combines pressure and temperature sensors with wireless communication capabilities and power management into a single integrated monitoring unit. This merging of multiple functions into one device reduces system complexity while maintaining measurement reliability through the coordinated operation of integrated components.
Solution Approach 2:
The patent replaces traditional wired mechanical pressure gauges with wireless electronic sensors. This substitution eliminates the need for physical connections and complex wiring infrastructure, significantly reducing device complexity while maintaining measurement accuracy through electronic sensing and wireless data transmission.
2Reliability
If wired pressure monitoring systems are installed, then continuous monitoring is achieved, but installation complexity and maintenance time increase
Solution Approach 1:
The patent replaces wired mechanical monitoring systems with wireless electronic sensors that transmit data remotely. This eliminates the need for physical installation of cables and complex wiring, reducing installation time and enabling quicker maintenance operations while maintaining continuous monitoring capability.
Solution Approach 2:
The monitoring system incorporates self-diagnostic capabilities and automatic data transmission, reducing the need for manual intervention and maintenance. The system can autonomously monitor its own status and communicate with remote monitoring centers, minimizing maintenance downtime and operational intervention requirements.
3Strength
If SF6 gas is used for insulation, then dielectric strength is maximized, but environmental harm increases due to greenhouse effect
Solution Approach 1:
The patent monitors and adjusts the filling pressure of alternative gases to optimize their dielectric performance. By precisely controlling pressure parameters and compensating for temperature variations, the system achieves dielectric strength comparable to SF6 using environmentally friendly alternative gases, thereby eliminating greenhouse effect harm while maintaining electrical insulation performance.
4Strength
If filling pressure is increased to compensate for lower dielectric strength of alternative gases, then dielectric strength is maintained, but measurement precision requirements increase
Solution Approach 1:
The patent employs electronic pressure sensors with high precision capabilities to replace traditional mechanical pressure gauges. These electronic sensors provide superior measurement precision and resolution, enabling accurate monitoring of filling pressure even at elevated levels, thereby supporting the use of alternative gases with optimized dielectric performance.
Solution Approach 2:
The system incorporates continuous feedback monitoring of pressure and temperature parameters, with automatic compensation algorithms that adjust measurements in real-time. This feedback mechanism ensures high measurement precision by correcting for environmental variations and maintaining accurate pressure readings despite the increased filling pressures required for alternative gases.
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 precise, energy-efficient, and compact monitoring of filling pressure and temperature, facilitating remote management and reducing maintenance downtime while adhering to international regulations.
Implementation Method 1
a first sensor (7) for the pressure of the fluid (2), based on microelectromechanical systems (MEMS) technology
Implementation Method 2
a second sensor (8) for the temperature of the compartment (4)
Implementation Method 3
Both the first pressure sensor and the second temperature sensor are integrated in a housing (14), which is supplied with operating energy, in particular by means of an integrated battery (9)
Data Source
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AI summary
The system (1) for monitoring the filling pressure of a fluid (2) in medium and high voltage electrical switchgear (3) allows continuous and remote control of the gas pressure throughout the useful life of the electrical switchgear, reducing the physical footprint of the sensors and communications electronics within the switchgear (3). It has energy-efficient and high-precision sensors, complying with international regulations and requirements of power grid operators. It comprises a measuring unit (5) with a pressure sensor (7) and a temperature sensor (8) integrated in a housing (14), and a processing unit (6), communicating wirelessly and bidirectionally through data transmission (15) and reception (16) means. The processing unit (6) can be installed separately from the switchgear (3) and the measuring unit (5) incorporates a battery (9) whose charge is monitored.