Inverter Arc Detection With Sampled-Signal Saturation Checks
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Solution Overview
Problem
Inverter systems face issues with signal saturation during arc detection due to amplitude limits, leading to distorted sampled signals and reduced accuracy and integrity of analysis.
Innovation Solution
A detection method for inverter systems that determines the saturation state of sampled signals by analyzing actual values, amplitudes, and sensitivity information, and performs desaturation measures to ensure accurate arc detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If amplitude limit is imposed on sampled signal, then signal processing is enabled, but signal distortion occurs when original signal exceeds amplitude limit
Solution Approach 1:
The patent performs preliminary saturation detection on the sampled signal before arc detection analysis. By detecting whether the signal is saturated in advance (comparing amplitude against threshold values), the system can take corrective action before the distorted signal affects arc detection accuracy, thus resolving the contradiction between enabling signal processing and maintaining measurement precision.
Solution Approach 2:
The patent implements feedback by continuously monitoring the sampled signal for saturation conditions and using this information to adjust the detection process. When saturation is detected, the system feeds back this information to modify the arc detection analysis, ensuring accurate results despite amplitude limits, thereby maintaining measurement precision while enabling signal processing.
2Measurement precision
If saturation detection is performed, then signal accuracy is maintained, but detection complexity increases
Solution Approach 1:
The patent segments the detection process into distinct modules: saturation detection module and arc detection module. The saturation detection is performed as a separate preliminary step using threshold comparison, which simplifies the overall complexity while maintaining accuracy. This segmentation allows the saturation check to be handled independently without complicating the main arc detection algorithm.
Solution Approach 2:
The patent uses simple threshold values and basic comparison operations for saturation detection, rather than complex algorithms. By employing straightforward threshold-based saturation detection (comparing signal amplitude against predefined thresholds), the system achieves accurate saturation identification with minimal computational complexity, effectively using simple 'disposable' detection mechanisms rather than complex continuous monitoring systems.
3Reliability
If desaturation measure is performed, then signal integrity is ensured, but processing time increases
Solution Approach 1:
The patent performs saturation detection as a preliminary action before the main arc detection process. By identifying saturated signals in advance and applying desaturation measures only when necessary, the system ensures signal integrity without adding significant processing time to the overall detection workflow. The preliminary check allows efficient branching of the processing path.
Solution Approach 2:
The patent applies desaturation measures partially - only when saturation is detected - rather than continuously processing all signals through complex desaturation algorithms. This partial application of desaturation processing ensures signal integrity for saturated signals while avoiding unnecessary processing time for unsaturated signals, thus balancing reliability and time efficiency.
Data Source
AI summary
Provided are a detection method for an inverter system, an inverter system, and an arc detection system, which belongs to the field of inverter systems. The detection method for an inverter system includes: obtaining a first actual value of a sampled signal obtained through sampling for the inverter system by an arc detection system, where the sampled signal is an input electrical signal or an inductive electrical signal of the inverter system; determining a saturation state of the sampled signal based on at least one of the first actual value, a maximum amplitude corresponding to the sampled signal, and a minimum amplitude corresponding to the sampled signal, where the saturation state includes saturated or unsaturated; and performing arc detection based on the saturation state.