用于中低压直流断路器检测的新型光纤传感器研究

Research on A New Optical Fiber Sensor for Detection of Medium and Low Voltage DC Circuit Breaker

随着光伏、风电等新能源发电的大规模投入运行,以及工业园区高比例直流接入的区域性直流配电网的需求,直流配电系统的应用越来越多,由于直流配电技术具备诸多优点,引起工业界与学术界越来越多的关注,对其核心设备低压直流断路器也提出更高的要求。为实现对中低压直流断路器灭弧室的检测,文章提出基于光纤非本征型法珀干涉传感器(Extrinsic Fabry-Pérot Interferometer,EFPI)的直流断路器检测技术,分析传感器的结构、灵敏度和中心频率,并进行试验验证。实验结果表明,所提光纤传感器可以用于中低压直流断路器的放电检测。

With the large-scale application of new energy power generation such as photovoltaic and wind power,the demand for a regional DC distribution network with a high proportion of DC access in industrial parks,application of DC distribution system is increasing.DC distribution technology has many advantages,which has attracted more and more attention from industry and academia,higher requirements are placed on its core equipment,low voltage DC circuit breakers.In order to realize the detection of the arc-extinguishing chamber of medium and low voltage DC circuit breakers,this paper proposes a DC circuit breaker detection technology based on optical fiber EFPI sensor.The structure,sensitivity and center frequency analysis of the sensor are mainly discussed and tested.The proposed optical fiber sensor can be used for discharge detection of medium and low voltage DC circuit breakers.