Fault Location on De-Energized Power Lines via Signal Simulation
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Solution Overview
Problem
Existing methods for locating faults on long power lines, especially those with branches, are inefficient, require advanced know-how, and can damage equipment due to repeated use of pulse generators, and are difficult to interpret, especially over longer distances.
Innovation Solution
A method and system that apply a voltage signal to a de-energized power line section to produce a reflection signal, simulate the signal for different fault locations, compare the simulated signals with measured signals, and indicate the fault location based on the highest correlation, using a simulation engine and processor to analyze the signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reflectometers are used for fault location on long power lines, then fault location is possible, but the readings become difficult to interpret and require advanced know-how
Solution Approach 1:
The patent creates a virtual copy of the power line section through electromagnetic field simulation. The simulation model replicates the physical line's characteristics, allowing fault location to be determined by comparing measured signals with simulated signals from known fault positions, thereby transforming the complex real-world measurement problem into a more manageable virtual environment for analysis
Solution Approach 2:
The patent introduces an intermediary simulation model that mediates between the actual power line and the measurement system. This virtual model processes and interprets the measurement signals by comparing them against simulated responses from known fault locations, serving as a bridge that translates complex measurements into interpretable fault location information
2Reliability
If pulse generators are used repeatedly to locate faults, then fault location can be confirmed, but equipment lifetime is reduced
Solution Approach 1:
The patent performs preliminary fault location identification through simulation before applying repeated pulse generator tests. By first determining the approximate fault location through signal analysis and comparison with simulated data, the number of subsequent high-voltage pulse applications is reduced, thereby protecting equipment while maintaining reliable fault confirmation
Solution Approach 2:
The patent implements feedback by continuously comparing measured signals with simulated signals from the virtual model. This feedback loop allows iterative refinement of the fault location estimate without requiring repeated high-voltage pulsing, as the simulation provides ongoing guidance on the measurement interpretation
3Adaptability or versatility
If reflectometers are used on lines with branches, then fault location is attempted, but multiple reflections bury the fault discontinuity
Solution Approach 1:
The patent segments the power line into virtual sections through the simulation model, allowing the complex signal reflections from branches to be analyzed and separated systematically. The virtual model processes signals section by section, enabling fault detection even in the presence of multiple reflections from branch points
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 efficient and precise fault location on long power lines with or without branches, reducing equipment damage and the need for advanced expertise, by accurately identifying fault locations through signal analysis and simulation.
Implementation Method 1
applying a voltage signal on the power line section in order to produce a reflection signal on the power line section characterizing the fault
Data Source
AI summary
The locating of a fault on a de-energized power line section is carried out by measuring a reflection signal characterizing the fault and deriving from a voltage signal applied on the section. An application of the voltage signal and corresponding measurements of reflection signals are simulated with a model of the section for a fault located at different locations along the section. The simulated reflection signals are compared with the measured reflection signal. A location of the fault is located based on the location of the fault for the simulated reflection signal having a highest correlation with the measured reflection signal.