Electric Power Defect Detection via Magnetic Force Signals
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Solution Overview
Problem
Conventional apparatuses for detecting defects in electric power systems are sensitive to noise, leading to operation delays and incorrect operations, and cannot differentiate between system failures and noise-induced stoppages.
Innovation Solution
An apparatus that outputs state signals using magnetic forces generated at the periphery of a line current, combining these signals with current magnitude and increase ratio comparisons to determine system defects, thereby reducing noise-related issues and improving detection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional current magnitude and increase ratio detection methods are used, then the apparatus can determine whether the electric power system is failed, but the apparatus becomes sensitive to noise causing incorrect operations and operation delays
Solution Approach 1:
The patent segments the defect detection function into two independent parallel detection paths: one based on current magnitude and increase ratio (conventional method), and another based on magnetic force detection (new method). Each path independently determines system state, and the final determination requires both paths to agree, thereby segmenting the noise-sensitive conventional method from the noise-resistant magnetic force method while maintaining comprehensive detection capability.
Solution Approach 2:
The patent introduces magnetic force as an intermediary physical quantity that mediates between the line current and the detection apparatus. Instead of directly detecting current magnitude which is susceptible to noise, the apparatus detects the magnetic force generated by the current, which provides a more stable and noise-resistant measurement path for determining system defects.
2Reliability
If the apparatus stops operation when noise is detected, then incorrect operations due to noise are prevented, but defect detection during operation stoppage is also prevented
Solution Approach 1:
The patent segments the detection signals into two independent sources: conventional current-based signals and magnetic force-based signals. By maintaining parallel operation of both detection paths, the system avoids complete stoppage due to noise while the magnetic force detection path continues to monitor for actual defects, ensuring both operational accuracy and continuous defect detection capability.
Solution Approach 2:
The patent applies different quality characteristics to different detection paths: the conventional current detection path can be made more selective and noise-filtered, while the magnetic force detection path provides continuous monitoring capability. This local differentiation allows the system to maintain high accuracy where needed while preserving continuous operation and detection elsewhere.
3Reliability
If the apparatus uses multiple detection parameters (current magnitude and increase ratio), then defect detection capability is improved, but the apparatus complexity increases
Solution Approach 1:
The patent segments the detection system into two functionally independent modules: a conventional detection module using current magnitude and increase ratio, and a magnetic force detection module. Each module operates independently with its own signal processing chain, reducing the complexity of integrating multiple parameters while maintaining comprehensive defect detection capability through parallel operation.
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 apparatus consistently detects electric power system defects even in noisy conditions, reduces incorrect operations, and shortens defect detection time by using magnetic force-based state signals and current ratio comparisons.
Implementation Method 1
outputting a first state signal by contacting one end of a moving unit to one end of a fixing unit using a magnetic force generated at a periphery of a line
Data Source
AI summary
An apparatus for detecting a defect of an electric power system according to one embodiment of the present disclosure includes a first state signal output unit for outputting a first state signal corresponding to a magnetic force generated at a periphery of a line, a second state signal output unit for outputting a second state signal based on a magnitude of a line current and an increase ratio thereof, and a determination unit for determining whether the electric power system is defective or not based on the first state signal and the second state signal.