Design Of Electrical Equipment Temperature Measurement System Based On Surface Acoustic Wave Technology

The temperature of electric power equipment is an important parameter, which indicates the operating state of the equipment. The temperature comprehensively reflects the influence, such as:the effect of aging equipment the over load of equipment the default of manufacturing and the internal fault of equipment. If the temperature of electric power equipment can not be measured in real-time, that will lead to serious accidents. Therefore, it is necessary to realize the system of temperature measurement for the safety of electric power equipment. The temperature measurement system is based on the temperature data and establishs a unifiled database. It will help users to realize the condition maintenance and the power grid load analysis. The system can help to take advantage of the temperature data for ensuring the safety and improving the efficiency.A temperature measurement system of electric power equipment is designed. The surface acoustic wave (SAW) technology is adopted to measure the temperature in this system. The SAW sensor has a lot of characteristic like:resisting the interference,low-power consumption and wireless. The system used the SAW can overcome the impact of the electromagnietic filed and the high voltage. The design task of the data terminal and the master station is been completed.The operating system is transplanted into the data terminal and the function task is been created. When the temperature rises across the limited set value, the data terminal will bring out the alarm data.the alarm data of temperature is storaged in the SD card. The wireless communication module is developed in the data terminal, which can realize to transfer the temperature data with collecter. The GPRS instruction set has been written for transferring forword. The IEC103 protocol has been realized to transformat the temperature data between the master station and the data terminal.The master station is designed by Supervisory Control And Data Acquisition (SCADA). The temperature data can be visually displayed in the master station and the historical data in the database can be inquired by time. The users can be managed into different class according to their jurisdictions in the master stationThe temperature measurement system of electric power equipment is tested in the switch cabinet of the power substation. Through the analysis of the temperature data, the SAW sensor have a good linearity and accuracy in temperature measuring. The wireless communication module and The GPRS module works regularly and speedly for transmission the temperature data in the operation state of the power equipment. The IEC103 protocol can reliablely interact to the network of electric power. The master station can help users to estimate the state of the operating power equipment with the visualized temperature data curve. Through the test of the temperature measurement system,the result is convinced that the sensor is smart and convenient for the measurement and the system have an excellent characteristic of real-time and accuracy. The realization of the system makes a strong reference for measuring the temperature of electric power equipment.