Study on the concentrated SF6 quantitative intelligent ultrasonic detection system

In order to realize on-line quantitative detection on SF 6 and effective control of running state of SF 6 high voltage power supply system, a concentrated SF 6 quantitative ultrasonic on-line detection system has been developed based on the actual demand of electric power system consumers. There are four major characteristics in this system. Firstly, the gas of maximum 64 detection points is transferred through the specific air path to the detection devices to be detected and analyzed, thereby the electrical lines and the complicated installation of the collectors can be avoided; secondly, the differential technique is used to shield the influence of environmental factors, which effectively improves the accuracy of the acoustic detection; thirdly, the SF 6 concentration is determined by the speed and phase in the ultrasonic wave transmission process, therefore there is no secondary pollution for the purely physical means; finally, the mature embedded technique is applied in this system to improve its intelligence and stability.