Ampacity Monitoring Using Probabilistic Temperature Risk Models

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Solution Overview

Problem

Current methods for monitoring high-voltage electric current transmission lines are not economically optimal and lack precision in calculating static ampacity, as they rely on simplified relations and do not effectively account for risks of exceeding distribution temperature limits.

Innovation Solution

A method that determines ampacity by optimizing the probability of exceeding the distribution temperature using a joint probability model of operating current strength and temperature, based on meteorological parameters, and updates the ampacity value iteratively to ensure a reliable and geographically pertinent calculation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a static ampacity is calculated using simplified deterministic relations with a priori selected meteorological parameters, then the calculation is simple and economically optimal, but the precision and reliability of ampacity estimation deteriorates

Engineering Contradiction:
Improvecalculation simplicityVSAvoidampacity estimation precision
Core Design Contradiction:
Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent transforms the deterministic calculation approach into a probabilistic one by changing the nature of parameters from fixed values to probability distributions. The ampacity is no longer a single deterministic value but a probabilistic estimate that accounts for the statistical variability of meteorological parameters, thereby improving precision while maintaining computational feasibility through iterative optimization.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements an iterative feedback mechanism where the ampacity calculation is continuously refined by comparing the probability of exceeding distribution temperature against a target probability. The monitoring device adjusts the ampacity estimate based on feedback from the probabilistic model, progressively improving the precision of the estimation until convergence is achieved.

Inventive Principle:
Principle #23Feedback

2Device complexity

If meteorological parameters are selected a priori as most unfavorable, then the ampacity calculation is simplified, but the actual risks of exceeding distribution temperature are not effectively controlled

Engineering Contradiction:
Improvecalculation complexityVSAvoidtemperature limit risk control
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent replaces the static, a priori selection of unfavorable meteorological parameters with a dynamic probabilistic model that continuously evaluates the likelihood of temperature exceedance. The system adaptively determines ampacity based on the probabilistic distribution of meteorological parameters rather than relying on fixed worst-case scenarios, thereby improving reliability while managing complexity through iterative computation.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent uses simplified probabilistic models and iterative calculations that can be computed efficiently without requiring complex real-time sensor systems. The approach replaces expensive, complex real-time monitoring infrastructure with computationally inexpensive probabilistic assessments that provide reliable risk control through statistical analysis rather than continuous physical measurement.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Measurement precision

If a dynamic instantaneous ampacity is calculated using real-time meteorological parameters from sensors, then the estimate precision is improved, but the device complexity and economic cost increase

Engineering Contradiction:
Improveinstantaneous ampacity estimate precisionVSAvoidsensor and processing complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical sensor-based real-time monitoring system with a computational probabilistic model. Instead of using physical sensors to continuously measure meteorological parameters and process the data in real-time, the system uses mathematical probability distributions and iterative calculations to estimate instantaneous ampacity, thereby maintaining precision while dramatically reducing device complexity and economic cost.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent creates a computational model that replicates the behavior of complex sensor-based systems without requiring the actual sensors. The probabilistic model copies the essential relationships between meteorological parameters and conductor temperature through mathematical formulations, providing accurate ampacity estimates without the need for expensive real-time measurement infrastructure.

Inventive Principle:
Principle #26Copying

Data Source

PatentUS10345364B2Method and device for monitoring a high-voltage electric current transmission line
Publication Date: 2019.07.09 RTE RESEAU DE TRANSPORT DELECTRICITE
  • US10345364B2 patent drawing
  • US10345364B2 patent drawing
  • US10345364B2 patent drawing

AI summary

A method for monitoring a high-voltage electric-current transmission line includes: determining (100) the ampacity (A) of the high-voltage line from a distribution temperature, conduction parameters and meteorological parameters; measuring (202) the current strength effectively transmitted by the high-voltage line using at least one sensor; and monitoring (204), by a monitoring device connected to the sensor, an excess of ampacity (A) by the current strength measured. The determining (100) of the ampacity (A) includes: selecting (108, 110, 112, 114, 116) a value of this ampacity (A) by optimizing a probability of exceeding the distribution temperature, with this probability defined based on a joint probability model (P) of operating current strength and temperature that depends on meteorological parameters; and recording (118) the selected ampacity value in a storage unit of the monitoring device.