Overhead Line Loadability via Thermal Sensor Data

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Solution Overview

Problem

Existing methods for determining the electrical loadability of overhead power lines are inadequate in addressing the dynamic changes caused by continuously varying ambient conditions and energy flows, which affect the current overload capability.

Innovation Solution

A method and device utilizing sensors connected to a data processing system to measure temperature and electrical current, accounting for existing or weighted load parameters, allowing for the determination of time-dependent electrical loadability by deriving conductor temperatures and predicting future loads using statistical methods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If temperature measurement and time-dependent load determination are implemented, then the accuracy of electrical loadability determination is improved, but the device complexity increases

Engineering Contradiction:
Improveelectrical loadability determination accuracyVSAvoidsensor and data processing system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical measurement systems with optical/infrared temperature sensing. The sensor system uses non-contact temperature measurement (likely infrared) to determine conductor temperature, which is then fed into a data processing system that calculates electrical loadability using thermal models. This substitution reduces mechanical complexity while improving measurement accuracy and enabling continuous monitoring.

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

Solution Approach 2:

The system utilizes naturally occurring thermal radiation from the power line conductors for temperature measurement. The conductors emit infrared radiation proportional to their temperature, and the sensor system passively detects this radiation without requiring active heating or complex interaction with the conductors. The data processing system then self-calculates loadability parameters based on measured temperature and standard thermal models.

Inventive Principle:
Principle #25Self-service

2Reliability

If continuous temperature monitoring is implemented, then the reliability of loadability determination is improved, but the energy consumption increases

Engineering Contradiction:
Improveloadability determination reliabilityVSAvoidsensor and data processing energy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system implements periodic temperature measurement at optimized time intervals rather than truly continuous monitoring. The data processing system determines when measurements are necessary based on changing load conditions, ambient temperature variations, and wind conditions. This periodic sampling approach maintains reliability for detecting significant temperature changes while minimizing energy consumption by keeping sensors in low-power states between measurements.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system uses feedback from temperature measurements and load data to dynamically adjust monitoring intensity. When temperatures approach critical thresholds or load conditions change significantly, the system increases measurement frequency. During stable operating conditions with comfortable temperature margins, monitoring frequency is reduced. This adaptive feedback control ensures reliability when needed while minimizing energy consumption during normal operation.

Inventive Principle:
Principle #23Feedback

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

Enables simple and proactive determination of power line loadability, optimizing power transport, preventing overloads, and facilitating integration of intermittent power sources, while allowing for anticipatory responses to supply shortages or overcapacities.

Implementation Method 1

by means of at least one sensor arranged on the power line and connected to a data processing system the temperature is measured

Methodology Applied
Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 2

the time-dependent temperature in the power line as conductor temperature is derived as a function of time. Based on the current measurements and the currently existing ambient conditions the loadability of the power line is derived

Methodology Applied
Scientific EffectHeat conduction: Conduction (thermal)

Data Source

PatentUS8170817B2Method and device for determining the electrical loadability of overhead lines by means of temperature measurement
Publication Date: 2012.05.01 DOBLE LEMKE
  • US8170817B2 patent drawing
  • US8170817B2 patent drawing
  • US8170817B2 patent drawing

AI summary

In a method for determining the electrical loadability of power lines by temperature measurement, the temperature is measured with at least one sensor arranged on the power line and connected to a data processing system, wherein the time-dependent temperature of the power line is determined by an existing or a weighted load parameter, and wherein based on the electrical current and the temperature measured by the sensor, taking into account either the existing or a weighted load parameter, a time-dependent electrical load is determined in the data processing system.