Resonance-Based Thermal Parameter Determination in Electrical Systems
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Solution Overview
Problem
Existing methods for determining thermal parameters in electrical systems, especially large ones like overland power supply lines and energy transmission cables, are inefficient due to economic and logistical challenges associated with using distributed temperature sensors, often relying on conservative current limit values instead of precise temperature monitoring.
Innovation Solution
A method that evaluates resonance points in electrical systems by applying an excitation signal, measuring input and output currents, and using analytical transformations to determine thermal parameters without the need for temperature sensors, leveraging the temperature-dependent changes in impedance and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distributed temperature sensors are deployed to monitor thermal parameters in electrical systems, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent uses resonance points as an intermediary to indirectly measure temperature. Instead of directly measuring temperature with sensors, the system measures electrical parameters (current, voltage, impedance) at resonance frequencies, which change with temperature. This intermediary measurement approach achieves temperature monitoring without deploying temperature sensors throughout the system.
Solution Approach 2:
The patent replaces the mechanical/physical temperature sensor system with an electrical measurement system. By substituting temperature sensors with electrical parameter measurements at resonance points, the system achieves temperature monitoring through electrical fields rather than physical contact sensors, reducing device complexity.
2Reliability
If temperature sensors are installed in electrical systems to monitor thermal loads, then reliability is improved through better temperature monitoring, but ease of operation deteriorates due to installation and maintenance effort
Solution Approach 1:
The patent enables the electrical system to monitor its own thermal state using its existing electrical infrastructure. The system uses its own resonance characteristics and existing electrical measurements to determine temperature, making the system self-monitoring without requiring external sensor installation or specialized maintenance procedures.
Solution Approach 2:
The patent makes the electrical measurement system multi-functional by using the same electrical parameters and resonance measurements for both system characterization and temperature monitoring. This universal approach allows existing electrical infrastructure to serve dual purposes, eliminating the need for separate temperature sensing infrastructure.
3Ease of operation
If conservative current limit values are used to prevent system deterioration, then ease of operation is maintained through simple control, but measurement precision deteriorates due to lack of actual temperature data
Solution Approach 1:
The patent implements feedback by continuously monitoring resonance parameters and using this information to determine actual thermal states. This feedback mechanism replaces conservative static current limits with dynamic, measurement-based thermal management, providing accurate thermal information while maintaining operational control through automated resonance parameter monitoring.
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
This approach allows for accurate, cost-effective, and non-invasive monitoring of thermal loads in electrical systems, preventing degradation and optimizing operational conditions without the need for extensive temperature sensor networks.
Implementation Method 1
The system excitation comprises one or more pre-determined excitation frequencies with which the electrical system can be excited at one or more pre-determined resonance points of the electrical system
Implementation Method 2
The thermally induced change in the resistive component and the resistive-reactive ratio causes a damping and shift of the resonance point
Data Source
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AI summary
The invention relates to a method for determining at least one thermal parameter of an electrical system by evaluating resonance points of the electrical system. The invention also relates to a computer program for carrying out such a method and to a measuring system with at least one control unit configured for carrying out the method.