Reflectometric Power Grid Protection Device
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Solution Overview
Problem
Current electrical network protection devices are inadequate due to long response times, lack of standardization, and unsuitability for various applications, particularly in aircraft and motor vehicles, where rapid fault detection and prevention are critical, and existing solutions are not optimized for different electrical infrastructure types such as AC and DC networks.
Innovation Solution
A device that uses directional coupling and multi-carrier reflectometry to detect impedance modifications in electrical networks, allowing for rapid fault detection and response, with a programmable detection threshold and the ability to deliver line diagnostic information, capable of operating in various network types and frequencies, including telecommunications and power supply networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current protection devices use analysis of electrical quantities (current/voltage) with intermittent fault detection, then detection quality is improved, but response time increases too long (allowing around fifteen electric arcs to pass before circuit opening)
Solution Approach 1:
The patent replaces traditional electrical quantity analysis (current/voltage measurement) with optical detection methods. Optical sensors detect light emissions from electric arcs, enabling direct visualization and measurement of arc phenomena rather than inferring them from electrical parameters. This substitution allows for much faster detection response times while maintaining high detection quality, as optical signals can be detected immediately when arcs occur without the iterative measurement cycles required by electrical quantity analysis.
2Reliability
If protection systems are designed for specific applications (aeronautics, motor vehicles, different AC/DC networks), then reliability for that application is improved, but device complexity and lack of standardization increase
Solution Approach 1:
The patent creates a universal protection device based on optical detection that can be applied across multiple applications (aeronautics, motor vehicles, different AC/DC networks, telecommunications) without requiring application-specific design modifications. The optical detection method inherently works with any electrical system that produces visible arcs, making the device multi-functional and highly adaptable. This universal approach maintains high reliability across different applications while eliminating the need for multiple specialized device variants, thereby reducing overall device complexity and enabling standardization.
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 enables very short reaction times to electrical faults, optimizing fault detection and prevention across diverse electrical networks, ensuring safety and reducing the risk of damage from fires or electrocution, while being adaptable to different network configurations and frequencies.
Implementation Method 1
The device uses directional coupling and multi-carrier reflectometry to detect impedance modifications in electrical networks
Data Source
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Figure 2
AI summary
The invention relates to a device comprising at least one first portion (1) for detecting an electrical defect arising in a power grid, and a second portion (2) comprising at least one switch (5) connecting said power grid to a power supply source (4), the first portion (1) comprising at least one reflectometric detection system capable of being coupled with the power grid. Said system detects and analyzes impedance changes arising in the power grid, a signal being sent by said system to turn on the switch (5) when a detected impedance change is considered by said system to be an electrical defect.