Arc-Flash Incident Energy Visualization on TCC Plots
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Solution Overview
Problem
Traditional methods for estimating arc-flash incident energy in electrical power systems rely on a single set of input parameters, which limits their ability to accurately represent the variability of physical behavior during arcing faults, leading to incomplete damage representation and inadequate protection and coordination in electrical power systems.
Innovation Solution
The system visualizes arc-flash incident energy or arc fault thermal energy on a time-current characteristic plot using bounded areas derived from all combinations and variations of input parameters, including AC, DC, and multi-frequency arc faults, providing a probabilistic representation of potential damage regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional single-set parameter methods are used to estimate arc-flash incident energy, then the calculation process is simple, but the accuracy and completeness of damage representation is insufficient
Solution Approach 1:
The patent segments the continuous range of input parameters into discrete sets (e.g., 5-10 different parameter sets representing varying conditions). Each set is evaluated separately to generate multiple incident energy values, which are then aggregated to form a comprehensive damage representation. This segmentation allows thorough analysis without requiring evaluation of every possible continuous parameter combination.
Solution Approach 2:
The patent evaluates a sufficient number of parameter combinations (excessive action) to ensure comprehensive coverage of possible arc-flash scenarios. By using multiple parameter sets rather than a single set, the method exceeds the minimum requirement for accurate representation, capturing the variability and uncertainty inherent in arc-flash events more completely.
2Reliability
If multiple parameter combinations are used to represent arc fault variability, then the damage representation becomes more accurate, but the visualization and analysis complexity increases
Solution Approach 1:
The patent merges multiple incident energy results from different parameter combinations into a unified visualization. This is achieved by overlaying the results on a single time-current characteristic curve, using techniques such as shading regions to indicate probability ranges or confidence intervals. The merging process consolidates complex multi-dimensional data into an intuitive two-dimensional representation that maintains reliability while reducing visualization complexity.
Solution Approach 2:
The patent adds a probabilistic dimension to the traditional time-current characteristic curve by incorporating the results from multiple parameter combinations. Instead of showing single-line incident energy values, the method displays shaded regions or contours that represent probability distributions or confidence intervals, effectively using a third visual dimension (opacity, shading intensity, or contour layers) to encode the complexity of multiple parameter evaluations.
3Reliability
If comprehensive parameter variations are considered, then the protective device coordination improves, but the calculation and processing time increases
Solution Approach 1:
The patent performs preliminary evaluation of parameter combinations by identifying and prioritizing the most influential parameters and their likely ranges before conducting full incident energy calculations. This preliminary action filters out less critical combinations or applies approximation methods for certain parameter sets, reducing the total number of full calculations required while maintaining the quality of protective device coordination results.
Data Source
AI summary
Provided are embodiments of systems, devices and methods to create and visualize an arc-flash incident energy or arc fault thermal energy on a TCC plot. In some embodiments, the system may use an area shape or region (of any form) on a TCC plot. The bounded area may represent a reference constant or variable arc fault energy or arc flash incident energy value.