Passive Wireless Temperature Sensor for High-Voltage Switchgear
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Solution Overview
Problem
Existing temperature measurement devices in high-voltage switchgear stations face challenges such as the need for real-time monitoring, maintenance interruptions due to battery-powered systems, and difficulty in reaching hot spots due to obstacles like anti-corona rings, which can lead to inaccurate overload assessments.
Innovation Solution
A contactless temperature measurement system comprising passive sensors near hot spots in the high-voltage portion connected via antennas to a control module in the low-voltage portion, allowing real-time temperature monitoring without a battery power supply, enabling continuous operation and eliminating maintenance interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If portable thermography devices are used for temperature measurement, then measurements can be performed during maintenance projects, but measurements cannot be performed in real time during operation and there are difficulties reaching certain points
Solution Approach 1:
The patent introduces an intermediary wireless communication system between the temperature sensor and the control module. The sensor in the high-voltage area transmits temperature data wirelessly through antennas to the control module in the low-voltage area, eliminating the need for physical access to measurement points and solving the accessibility problem while maintaining measurement accuracy.
2Reliability
If on-board temperature measurement devices are used, then real-time temperature monitoring is possible, but regular maintenance is required involving power interruption at the switchgear station
Solution Approach 1:
The temperature sensor is designed as a passive device that harvests energy from the electromagnetic field or uses energy harvesting techniques to power itself without requiring an external battery or power supply. This eliminates the need for regular maintenance and power interruptions, allowing continuous real-time monitoring while the sensor maintains itself autonomously.
3Measurement precision
If sensors are installed close to hot spots, then measurement accuracy is improved, but sensors must be located in high-voltage portions requiring maintenance
Solution Approach 1:
The wireless communication system acts as an intermediary that decouples the sensor from the control module. The sensor can be placed close to hot spots in the high-voltage area while the control module remains in the low-voltage area, managing sensor data remotely. This reduces placement complexity and eliminates maintenance interruptions while maintaining measurement precision.
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 real-time temperature monitoring during switchgear station operation, reducing maintenance needs and improving accuracy in overload assessments by allowing sensors to be installed close to hot spots, thus enhancing operational safety and efficiency.
Implementation Method 1
the at least one temperature sensor being suitable for transmitting a signal representative of the temperature measurement and the control module being suitable for receiving the representative signal, via the antennas
Data Source
AI summary
The invention relates to a device for measuring temperature in a high-voltage portion of a switchgear station, characterised in that it comprises: at least one temperature sensor (21, 22, 23, 24) located at a point on the high-voltage portion of which the temperature is to be monitored, at least one antenna (25) connected to the at least one temperature sensor, a control module (26) located in a low-voltage portion of the switchgear station, and at least one antenna (27) connected to the control module. The at least one temperature sensor (21, 22, 23, 24) is suitable for transmitting a signal representative of a temperature measurement and the control module (26) is suitable for receiving the representative signal, via the antennas, and for processing said signal in order to produce a message.