FPGA Partial Discharge Normalization for Consistent Detection
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Solution Overview
Problem
Partial discharge detection across varying devices is inconsistent due to differences in host measuring units and signal frequencies, leading to inconsistent results and loss of information integrity.
Innovation Solution
A field-programmable gate array is used to normalize partial discharge signals by isolating high-frequency information, applying a compensation value, and comparing it to a threshold, allowing different host units to display consistent results without information loss, and enabling variability in attenuation circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different host measuring units and voltage dividers are used to detect partial discharges, then detection coverage is improved, but measurement consistency deteriorates
Solution Approach 1:
The patent applies parameter changes by normalizing partial discharge signal amplitudes to a reference voltage divider ratio. This involves calculating a normalized amplitude value that compensates for differences in voltage divider configurations across various host measuring units, thereby maintaining measurement consistency while allowing diverse detection capabilities
Solution Approach 2:
The patent introduces an intermediary normalization process that acts as a mediator between different voltage divider configurations and the final measurement results. By inserting this normalization step, the system reconciles variations in hardware configurations to produce consistent measurements across different host units
2Measurement precision
If signal normalization is applied across varying devices, then measurement consistency is improved, but information integrity may be lost
Solution Approach 1:
The patent applies preliminary action by calculating and storing the voltage divider ratio for each host measuring unit before actual partial discharge detection. This pre-characterization allows the system to apply appropriate normalization factors during measurement, ensuring consistency without losing relevant signal information
Solution Approach 2:
The patent implements feedback by using the known voltage divider ratio as a reference to adjust and normalize measured partial discharge amplitudes. This feedback mechanism ensures that measurements from different devices are corrected based on their specific characteristics, maintaining both consistency and information integrity
3Device complexity
If traditional detection methods are used without normalization, then device complexity is reduced, but detection reliability deteriorates
Solution Approach 1:
The patent applies parameter changes by introducing a normalization parameter (voltage divider ratio) that compensates for hardware variations. This simple parameter adjustment significantly improves detection reliability without requiring complex system redesign or additional hardware components
Data Source
AI summary
The disclosure herein relates to a field-programmable gate array for detecting and normalizing partial discharges in a digital signal. The field-programmable gate array includes a filter that receives the digital signal and isolates high frequency information from the digital signal. The field-programmable gate array then normalizes the high frequency information by a compensation value to produce a normalized signal. Further, a comparator of the field-programmable gate array can determine whether the normalized signal exceeds a threshold input. In turn, a counter of the field-programmable gate array increments a counter value in response to each determination that the high frequency information exceeds the threshold input.