Gas Cell Electric Field Sensing for High-Voltage Line Measurement
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Solution Overview
Problem
Measuring the voltage of high-voltage transmission power lines is challenging due to the high voltages involved, and existing electric field measurement devices are difficult and expensive to create.
Innovation Solution
An electric field sensor comprising a gas cell, ground plane, transmitter, receiver, processing circuit, and energy harvesting circuit, which measures the electric field generated by the power line to determine voltage indirectly, using the molecular Stark effect to analyze dipolar gas molecules within the gas cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct voltage measurement equipment is used on high-voltage transmission lines, then voltage measurement is achieved, but safety risks and equipment complexity increase due to high voltage exposure
Solution Approach 1:
The patent uses an electric field sensor as an intermediary device to measure voltage indirectly. Instead of placing measurement equipment directly on the high-voltage line, the sensor measures the electric field surrounding the conductor, which is then converted to voltage information through calibration curves or algorithms. This intermediary approach eliminates direct contact with high voltage while maintaining measurement accuracy.
2Measurement precision
If traditional electric field measurement devices are used, then electric field measurement capability is achieved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent replaces complex traditional electric field measurement devices with a simplified system based on a gas cell and optical detection. Instead of using expensive electronic field sensors, the system uses the Stark effect in a gas cell where electric field-induced changes in light absorption or emission are detected optically. This substitution of mechanical/electronic systems with optical methods reduces manufacturing complexity and cost.
Solution Approach 2:
The patent changes the measurement parameter from direct electrical field sensing to optical property changes in a gas. By utilizing the Stark effect, which causes changes in the spectral lines or absorption characteristics of gas molecules under electric field influence, the system converts an electrical measurement problem into an optical measurement problem, enabling simpler and cheaper device construction.
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 accurate and cost-effective measurement of electric fields around high-voltage transmission lines, allowing for the inference of conductor damage without direct voltage measurement.
Implementation Method 1
using the molecular Stark effect to analyze dipolar gas molecules within the gas cell
Implementation Method 2
measuring a dielectric constant of the gas within the gas cell
Data Source
AI summary
An electric field sensor includes a gas cell having a first terminal and a second terminal. A ground plane is proximate the gas cell. A transmitter has an input and an output. The transmitter's output is communicatively coupled to the first terminal of the gas cell. A receiver has an input and an output. The receiver's input is communicatively coupled to the second terminal. A processing circuit has a processing circuit input and a processing circuit output. The processing circuit input is coupled to the output of the receiver, and the processing circuit output is coupled to the input of the transmitter.