Arc Fault Detection Module for High Voltage Aircraft Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current arc fault detection systems are inadequate for high voltage AC and DC systems in the 'More Electric Aircraft' due to their limited capability in detecting arc faults at higher voltage levels, which increases the risk of electrical failures and safety hazards.
Innovation Solution
An arc fault detection module and method that utilize a combination of low frequency current, voltage, and high frequency current sections to detect rises in energy across multiple frequency sub-bands, synchronizing these detections to determine the occurrence of an arc fault, thereby providing effective protection against arc faults in high voltage AC and DC systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional arc fault detection systems are used in high voltage AC and DC systems, then the system structure remains simple, but the detection capability and reliability are insufficient
Solution Approach 1:
The detection system is divided into multiple independent detection modules, each responsible for specific frequency bands or detection parameters. This segmentation allows the system to handle complex high voltage arc fault detection through modular components, improving reliability while managing complexity through organized modularity
Solution Approach 2:
The system extends detection from traditional single-frequency or low-frequency monitoring to multi-frequency band analysis including high frequency components. By adding the frequency dimension, the system achieves superior arc fault detection capability that distinguishes actual arc faults from other electrical disturbances
2Measurement precision
If multi-frequency detection is implemented to improve arc fault detection accuracy, then detection precision improves, but device complexity increases
Solution Approach 1:
The frequency spectrum is segmented into multiple detection bands, with dedicated detection circuits for each band. This segmentation enables precise arc fault detection across different frequencies while keeping each detection module relatively simple and manageable
Solution Approach 2:
The detection system employs universal detection modules that can operate across multiple frequency bands. These multi-functional modules reduce overall system complexity by using standardized components rather than specialized circuits for each frequency band
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 effectively identifies and responds to arc faults in high voltage AC and DC systems, reducing the risk of electrical failures and enhancing safety by accurately detecting energy anomalies across various frequency bands, ensuring timely intervention to prevent damage.
Implementation Method 1
detect a rise in energy of the frequency sub-band above a first predetermined threshold level associated with the frequency sub-band
Data Source
AI summary
An AC arc fault detection module includes an LF current section, an LF voltage section, and an HF current section having a plurality of outputs, each output being associated with a respective one of a plurality of frequency sub-bands. The HF current section is structured to, for each of the frequency sub-bands, (i) detect a rise in energy of the frequency sub-band above a first predetermined threshold level for at least a certain amount of time and (ii) cause the associated output to indicate a rise in energy detection in response to detecting the rise in energy above the associated threshold level for at least the associated certain amount of time. The module includes a processing device structured to determine whether an AC arc fault has occurred based on the outputs from the LF and HF current and LF voltage sections.