Solar Inverter Arc Detection Across Branch Wiring Paths
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Solution Overview
Problem
Existing systems require multiple arc detection means for each path of a branch wire before and after branching, increasing system size and cost.
Innovation Solution
An arc detection device with a voltage detector connected between a first wire and a second wire to detect voltage, and an arc determiner to determine arc occurrence based on the detected voltage, allowing for easy detection of arcs in branch wires without the need for multiple detection means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple arc detection means are provided for each path of the branch wire before and after branching, then arc detection coverage is improved, but system size and cost increase
Solution Approach 1:
The single arc detection device is designed to detect arcs in multiple paths (both pre-branching and post-branching paths) simultaneously through voltage detection between the first and second wires. This multi-functional approach allows one device to perform the work of multiple separate detection means, reducing system size while maintaining comprehensive arc detection coverage across all branch wire paths.
2Reliability
If multiple arc detection means are provided for each path of the branch wire before and after branching, then arc detection coverage is improved, but system cost increases
Solution Approach 1:
The arc detection device implements a universal detection mechanism that monitors voltage between the first and second wires to detect arcs in all paths (pre-branching and post-branching). This single multi-functional device replaces the need for multiple separate detection devices, thereby reducing material costs, installation costs, and maintenance costs while maintaining comprehensive arc detection coverage.
3Device complexity
If a single arc detection device is used for all paths, then system complexity is reduced, but arc detection capability may be compromised
Solution Approach 1:
The voltage detection mechanism acts as an intermediary that indirectly detects arc occurrence in multiple paths by measuring voltage between the first and second wires. This intermediary approach allows the single detection device to capture arc information from all paths without requiring direct contact with each individual path, thereby maintaining arc detection capability while simplifying the system structure.
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 efficient detection of arcs in branch wires, reducing system complexity and cost by using a single voltage detector to detect arcs in both pre- and post-branching paths.
Implementation Method 1
a voltage detector connected between a first wire and a second wire to detect a voltage between the first wire and the second wire
Data Source
AI summary
An arc detection device includes a voltage detector connected between a first wire and a second wire to detect a voltage between the first wire and the second wire, the first wire connecting a positive electrode of a DC/DC converter and a plurality of DC/DC converters and branching from the positive electrode of the DC power source into the plurality of DC/DC converters, the second wire connecting a negative electrode of the DC/DC converter and the plurality of DC/DC converters and branching from the negative electrode of the DC/DC converter into the plurality of DC/DC converters; and an arc determiner that determines an occurrence of an arc based on the voltage detected by the voltage detector.