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Time:2021-10-13 Views:957

Electric power industry-distributed optical fiber temperature monitoring system application technical solution


1. The necessity of temperature monitoring in the power industry

电力应用(图1)

        With the development of my country's economy, the electric power system is developing in the direction of high voltage, large power grid, large capacity, and automation. Once an accident occurs, it will cause huge losses to the national economy. How to conduct online monitoring of power equipment in operation and conduct safety prediction and temperature change trend analysis, how to use real-time data to conduct scientific analysis of equipment quality, operating environment, operation mode, equipment aging, load imbalance, etc. These are all power systems Urgently need to be resolved. Traditional infrared thermometers, infrared imagers, temperature sensing cables, thermal resistance temperature measurement systems, etc. can only measure the temperature of local locations in the power system, and cannot provide scientific basis for safe, economical, and efficient monitoring. "Line-type optical fiber temperature sensing fire detection system" is a new mature product of fire detection and alarm. The detector of the optical fiber sensing system is a special armored optical cable, which senses and transmits information through laser signals. The optical fiber is intrinsically safe, insulated, and Explosion-proof characteristics can be widely used in power industry systems. The fire alarm system composed of it can monitor the hidden fire hazards of cable tunnels, cable trenches, transformers, switch cabinets, cables and other parts of the enterprise in real time. Hoyatek DTS distributed optical fiber temperature monitoring system can be applied to safety monitoring of cable body temperature, cable ambient temperature, high voltage switchgear, transformer contact temperature, etc. in the power industry.


2. the significance of temperature measurement in the power industry

[Improve safety protection]: Real-time temperature monitoring of the operating status of equipment in the power industry can effectively understand the on-site status in a timely and effective manner to prevent problems before they occur;

[Reduce labor cost]: The system can achieve 24-hour real-time monitoring, which can save manual inspections, and at the same time solve the difficulties of difficult-to-monitor locations, and fill in the blind areas of monitoring; if an abnormal temperature alarm occurs, it can effectively locate the alarm and guide the work Personnel conduct positioning maintenance, save time and improve maintenance efficiency;

[Ensure economic benefits]: The system can achieve early warning and achieve the goal of "unmanned substation", which can effectively avoid potential safety hazards and safety accidents, thereby ensuring safety while also ensuring economic benefits;


3. Hoyatek DTS distributed optical fiber temperature measurement system application

电力应用(图2) 

        This system adopts today's advanced photoelectric technology, communication technology, microprocessor technology, digital temperature sensing technology and original design of low temperature, strong electric field, and humid environment operation technology. It can separately monitor the temperature in different environments, discover potential accidents as early as possible, and minimize losses. At the same time, it can also provide a large amount of online monitoring data to provide a reliable basis for operators to fully understand the operation of power equipment.

Features of DTS distributed optical fiber temperature monitoring system

[Advancement]: Based on the distributed optical fiber temperature measurement technology widely promoted in the power industry in the world, the system has excellent technical performance and quality based on the successful application experience of nearly 20 years abroad;

[Safety]: Using optical fiber as the medium of temperature sensing and signal transmission, the sensor does not need power supply to work, it is intrinsically safe, has excellent insulation performance and anti-electromagnetic interference, and the sensor installation meets safety regulations;

[Stability and accuracy]: The temperature data is obtained by detecting the movement of the wavelength of light waves. The sensor is only sensitive to temperature, which avoids the problem of traditional sensors that are easily affected by interference factors such as power supply fluctuations and transmission line loss. The system is stable and reliable; temperature measurement accuracy Reach ± 1℃, and the temperature resolution can reach 0.1℃;

[High reliability in long-term operation]: The system is safe and reliable in operation, stable in performance, suitable for long-term continuous work in harsh environments;

[Compatibility]: The monitoring host has its own standard communication interface, providing Ethernet ports, RS232, USB, etc., combined with the integrated automation system of variable power stations, etc., to achieve data sharing, simple management, and seamless connection with related systems;

[Economy]: The cost of the system is reasonable and cost-effective. After it is completed and put into use, it can work unattended for a long time, and the maintenance cost is low;

[Ease of operation and maintenance]: Friendly man-machine interface, easy operation; the sensor has no zero drift, no need to re-calibrate, and the system is maintenance-free;


Four, single system scheme design


4.1 The design of the cable body temperature monitoring program

Cable body temperature monitoring can be divided into single cable temperature monitoring and cable interlayer temperature monitoring.

Ø Automatic real-time detection: 24 hours real-time online monitoring of cable temperature changes, when the temperature of a certain point or multiple points of the cable is abnormal, the system can immediately locate and alarm.

Ø Network linkage: When an abnormal temperature alarm occurs, the sound and light alarm and SMS alarm function can be linked. The system can send the alarm information to the operator's mobile phone. At the same time, the on-site alarm status can be remotely monitored through the computer.

电力应用(图3) 

 


4.2 Design of environmental temperature monitoring program for cable trench and cable tunnel

Ø Automatic real-time detection: 24-hour real-time online monitoring of the overall temperature change of the cable trench or cable tunnel. When a temperature abnormality occurs at a certain point or multiple points in the monitoring environment, the system can immediately locate and alarm.

Ø Network linkage: When an abnormal temperature alarm occurs, the sound and light alarm and SMS alarm function can be linked. The system can send the alarm information to the operator's mobile phone. At the same time, the on-site alarm status can be remotely monitored through the computer.

电力应用(图4) 


4.3 Design of temperature monitoring scheme for high-voltage switchgear

Ø Automatic real-time detection: 24-hour real-time online monitoring of the temperature change of the high-voltage switchgear contacts. When a certain contact or multiple contacts of the high-voltage switchgear have abnormal temperature, the system can immediately locate and alarm.

Ø Network linkage: When an abnormal temperature alarm occurs, the sound and light alarm and SMS alarm function can be linked. The system can send the alarm information to the operator's mobile phone. At the same time, the on-site alarm status can be remotely monitored through the computer.


4.4 Design and implementation of transformer temperature monitoring program

Ø Automatic real-time detection: 24-hour real-time online monitoring of the temperature changes of the transformer contacts. When a certain contact or multiple contacts of the transformer have abnormal temperature, the system can immediately locate and alarm.

Ø Network linkage: When an abnormal temperature alarm occurs, the sound and light alarm and SMS alarm function can be linked. The system can send the alarm information to the operator's mobile phone. At the same time, the on-site alarm status can be remotely monitored through the computer.

电力应用(图5) 


Five, related case display

电力应用(图6) 

 

 


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