Arc Detection via Node Current Correlation
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Solution Overview
Problem
In electrical systems, particularly those with high voltage like 48 V systems in vehicles, detecting arcs is challenging due to current limitations, making it difficult to distinguish between arc formation and normal current fluctuations, and existing methods fail to reliably detect arcs early enough to prevent significant damage.
Innovation Solution
A method involving continuous reading of current values for each component connected to a node, determining node-current and system current, calculating correlation factors, and using a corrected node-current equation to set a trigger threshold for arc detection, allowing for early detection of arcs even with high system loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If parallel arcs occur in electrical lines, then the arc power increases significantly, but the arc current remains within the load range and is difficult to detect
Solution Approach 1:
The patent segments the total current measurement into individual consumer current measurements. By measuring the current of each parallel consumer separately and comparing the sum of individual currents with the total line current, the system can detect deviations that indicate parallel arcs. This segmentation approach allows detection of arc conditions even when the total current remains within normal load ranges.
Solution Approach 2:
The patent moves from a single-dimensional total current measurement to a multi-dimensional approach by measuring and evaluating individual consumer currents separately. This dimensional expansion allows the system to detect arc conditions through the relationship between individual and total currents, providing an additional detection dimension that reveals parallel arcs invisible to conventional single-point current measurement.
Data Source
AI summary
A method and a device for detecting arcs includes current values for each component connected to a node being read-in, the node current and the system current determined using the current values, a correlation factor determined for each current value with the node current as quotient from node current and the respective current value, the individual quotients filtered in order to determine a correction factor for each current value, a corrected node-current equation established, wherein each current value is linked to the correction factor previously determined, in order to determine a corrected value of the node evaluation, and finally a trigger threshold is set using the corrected node-current equation.