The best method for temperature monitoring in switchgear is to use fiber optic sensors

Teplotní senzor s optickými vlákny, Inteligentní monitorovací systém, Výrobce distribuovaných optických vláken v Číně

Point type Optické teplotní senzory can be used for safety monitoring of power equipment. On the basis of effectively maintaining application quality, temperature sensing elements can be used to constrain the measurement process. Due to the high measurement accuracy and simple principle of these sensors, which can improve the timeliness of operation, they are widely used in power equipment monitoring projects to optimize the actual level of temperature measurement and analysis.

Characteristics of Fiber Optic Sensors

Fiber optic sensors themselves have characteristics such as insulation and resistance to electromagnetic interference, which can ensure the safety of the monitoring process, and have outstanding corrosion resistance and high temperature resistance. Applying it to high DC electric fields can effectively improve the contact measurement of temperature, with high measurement accuracy, and establish corresponding measurement networks, laying the foundation for the subsequent automation monitoring of power equipment operation.

In the application process of fiber optic temperature sensing technology, both domestically and internationally, the focus is on sensor research and fiber optic temperature management. Proto, fiber optic grating temperature sensors have become the key to research projects in fiber optic temperature sensing technology. In the fiber optic distributed temperature measurement system, research on fiber optic temperature sensing technology needs to be integrated with fire prevention, multi-point temperature control, and other projects for comprehensive analysis, but its overall cost is relatively high.

The basic temperature measurement principle of point type fiber optic temperature sensors in practical applications is that the critical edge of the semiconductor absorption spectrum will change with temperature and move accordingly. It can establish effective analysis and judgment of the degree of change after the semiconductor chip undergoes light intensity processing. Navíc, the absorption rate of semiconductor media is directly related to the bandgap width of the semiconductor during the process of light absorption. After the temperature changes, thermal expansion and temperature changes will affect the vibration state of the crystal, causing changes in the actual width parameter of the bandgap and resulting in abnormal absorption spectra.

Under certain conditions, the thickness of the light source illumination varies. The projected light intensity needs to be measured for specific parameters with the help of It ddt RR I α α − − −=1 e (1) e22. Mezi nimi, R represents the power reflection coefficient of the entire light source illumination system, which is proportional to the refractive index, extinction coefficient, and incident angle of the material; D represents the actual thickness of the entire semiconductor structure; α represents the absorption coefficient of the semiconductor material itself. By combining actual measurement data, it is possible to effectively analyze the actual level of the corresponding system, and by combining the relationship between the light source wavelength determination function, calculate the integral over the entire wavelength range. That is to say, in practical operation, selecting an incident broadband light source and matching photodiodes can effectively calculate and analyze the transmitted light intensity, and the relevant parameters can also show different trends with changes in environmental temperature, effectively improving the overall efficiency of temperature detection work.

Implementation of Fiber Optic Sensor System in Power System Detection

In the hardware implementation of power systems, the operational level of switchgear is crucial, and technicians need to integrate circuit breakers to ensure that mobile carts and switchgear can play their actual value. Mezi nimi, the high-voltage switchgear itself has 6 contacts, one distributed on each of the three phases on the upper and lower sides, which can effectively improve the reliability of system operation and enable real-time monitoring and temperature measurement with the help of contacts. Proto, it is necessary to improve the probe and circuit signal processing facilities during the temperature monitoring process of the high-voltage switchgear in the system, and to achieve the following points.

Firstly, select the light source. After the light is emitted from the light source, the transmittance intensity will gradually change with temperature changes through the action of the probe. With the help of a point type fiber optic temperature sensor, the intensity of the transmitted light can be monitored for temperature to ensure the implementation of the work. Proto, technicians need to constrain the measurement range of sensors in the selection of light sources, and judge based on the temperature change of the critical edge of the absorption spectrum to effectively obtain a wider spectral width parameter. It should be noted that in terms of selecting the wavelength of the light source, sufficient parameter considerations should be made in conjunction with the absorption edge, and the parameters should be controlled between 864-908 nm to select more suitable parameters, laying the foundation for the comprehensive development of detecting light intensity expansion and center wavelength processing work.

Za druhé, the probe design work, combined with the application structure and principle of the sensor itself, applies it to the contact processing of high-voltage switchgear in the power system, conducts temperature testing on high-voltage cable joints, and ensures that it can provide basic parameters for sensor installation work. In the process of designing probes, it is necessary to analyze and determine the volume and thermal balance parameters of the probe. Obecně, copper materials with good thermal conductivity are chosen to improve the timeliness of the processing mechanism to a certain extent.

Thirdly, signal processing circuit design. In sensor signal processing, it is necessary to determine the core unit based on actual requirements, effectively integrate the microcontroller structure, use high-performance and low-power 8-bit AVR microcontrollers to effectively determine relevant parameters, reasonably improve the control of memory, provide guarantees for obtaining hardware interface circuits, and integrate RISC simplified instructions to ensure the integration effect of the structure and optimize the system programming effect.

Application of Fiber Optic Temperature Measurement System Software

In the power equipment monitoring system, combined with the efficiency and overall application level of sensors, in addition to overall management of hardware structure, it is also necessary to improve the software system to ensure that the corresponding system components can lay the foundation for the smooth implementation of safety monitoring work.

Firstly, the signal acquisition and control software system mainly captures signals in a timely manner, filters and summarizes signal information for subsequent development of corresponding action instructions. It should be noted that in the signal acquisition, processing, and control system, attention should be paid to the authenticity of data information in order to achieve comprehensive supervision and control quality.

Za druhé, the structure of signal filtering software mainly involves analyzing and determining filtering parameters, determining the timeliness of the results based on relevant parameters, and specifically analyzing and processing relevant situations.

Thirdly, the average interpolation calculation software is a software system with strong calculation functions, which can perform real-time calculation and verification of average interpolation, in order to improve the efficiency of calculation results and data comparison analysis in the future.

Fourthly, display the software structure of the output, and after all processes are completed, use the output software to complete data processing and output. To further implement real-time monitoring of equipment safety, it is necessary to improve the timeliness of the monitoring process by combining feedback parameters.

Navíc, in information collection work, the technical department should focus on the relationship between the collection structure and the application system, effectively improve the rationality of the collection process and the communication process on the machine, and upgrade the collection process to ensure real-time performance and the integrity of the application effect. The most important thing is that the application of software systems should take CPU improvement as a prerequisite, and on the basis of integrated utilization efficiency, conduct centralized analysis and judgment on the quality of software process initialization operations, functional processing operation instructions, and timed interrupt function instructions, in order to reasonably improve control standards.

On the basis of comprehensive analysis and system optimization of point type fiber optic temperature sensors, the application process of sensors in power equipment monitoring has been tested in the structure of 10kV high-voltage switchgear, which can effectively form 9-point monitoring. On the basis of traditional technology, system calibration and experimental testing are carried out by directly placing the fiber optic sensor in the electric constant temperature box of the equipment, effectively meeting the temperature control efficiency. During the experiment, the temperature gradually increased from room temperature. The operator needs to measure the temperature and coefficient analog output of the constant temperature box at different temperature intervals, effectively integrate the temperature values, and improve the final processing effect. On the basis of the joint action of thermocouple thermometer and mercury temperature sensor, corresponding temperature parameters are obtained. After using thermocouple thermometers and mercury thermometers to detect temperature, it can be used as a reference value for the temperature of the constant temperature chamber.

In actual measurement work, in order to comprehensively understand the time stability of fiber optic temperature sensors during operation, attention should be paid to data feedback after continuous measurement, ensuring the selection of basic temperature control conditions, and based on this, obtaining differentiated measurement results of fiber optic temperature sensors formed by changes in time,

Time stability test curve of fiber optic thermometer

It is not difficult to find that temperature measurement is unstable in the context of continuous accumulation of time. Combining measurement information can determine the temperature drift effect of temperature sensors and explore the measurement accuracy of temperature sensors. It can be seen that the stability of time is of great significance for the quality of the monitoring process. Navíc, sensors mainly use fiber optic technology, which is heat-resistant and can be directly placed in temperature control systems. By controlling the temperature between -20 to 125 °C, the system can also operate normally.

Fiber optic temperature sensor for switchgear temperature measurement

After calibrating and testing the system installation system, it is necessary to ensure the actual level of application of the switchgear. The installation process of the system chassis also needs to analyze the low-voltage part of the switchgear, especially the light bundling and pipe structure connecting the chassis and probes. To ensure the timeliness of processing efficiency, it is necessary to ensure that the fiber bending parameters meet the actual requirements during the installation process and avoid fiber mixing that affects fiber utilization. Usually, measuring data parameters requires establishing a connection relationship through RS485 serial bus and connecting it in the monitoring room. Combined with the accumulated data during software operation, temperature testing and analysis are carried out at different points to effectively improve the basic level of system alarm. In the process of sensor application, it is necessary to measure and analyze the temperature of high-voltage transmission cable joints. The number of monitoring measurements should be controlled at 20 or more, and a monitoring network should be established using RS485 to analyze and transmit information to different fixed points in the system, forming a monitoring structure. It is precisely because the system can measure the temperature of the contacts of the cable system, and if the temperature is high, it will give an alarm, which can to some extent avoid accidents.

Using fiber optic sensors for systematic analysis and safety monitoring of electronic devices can effectively improve data analysis results, ensure the integrity of subsequent data analysis and judgment efficiency, and ensure the rationality of absorption rate on the basis of effectively integrating light intensity parameters, laying the foundation for comprehensive optimization of measurement accuracy.