The construction of substation security system played an important role in ensuring the safe operation of the whole power system.In order to promote the process of unattended substation and improve the reliability of power supply in power system,an optical fiber perimeter security system based on in-line Sagnac was designed.The detection method of optical fiber vibration signal was demonstrated in detail,and a dynamic threshold endpoint detection algorithm based on multi-domain features was proposed.The characteristics of vibration signal were extracted from time domain,frequency domain and wavelet domain to judge,and the characteristic threshold was updated in real time.The three-level decision algorithm improved the detection effect of the system on intrusion events.The combination of optical fiber security system with video monitoring system,WeChat alarm system and sound and light alarm system could provide all-weather and multi-technology integrated three-dimensional protection for unattended substations.
关键词
光纤传感/电力系统/直线型Sagnac/光纤周界安防系统/振动检测/多域特征
Key words
optical fiber sensing/power system/in-line Sagnac/fiber perimeter security system/vibration detection/multi-domain features
维普
万方数据