Off-line low-voltage cable ground fault positioning device based on pulse coding

The invention discloses an off-line low-voltage cable grounding fault positioning device based on pulse coding, and aims to adjust adaptive parameters of a signal injection device by adopting adaptive closed-loop feedback through a signal injection module, reduce the power consumption of the signal injection device, and inject a coding pulse current signal into a cable in a pulse coding manner; meanwhile, a signal detection device adopts a Rogowski coil to collect and differentiate a coding pulse current signal in the cable, and the pulse current signal is amplified, filtered and integrated, so the current detection sensitivity is improved, the grounding fault position of the cable in the operation process is safely, efficiently and accurately positioned, the grounding fault is quickly processed, and the power failure time is shortened. 一种基于脉冲编码的离线低压电缆接地故障定位装置，目的是通过信号注入模块，采用自适应闭环反馈调节信号注入装置适配参数，降低信号注入装置功耗，再通过脉冲编码方式向电缆中注入编码脉冲电流信号，同时通过信号检测装置采用罗氏线圈采集、微分电缆中的编码脉冲电流信号，并对脉冲电流信号进行放大、滤波、积分，提高电流检测灵敏度，进而安全、高效、准确的定位电缆在运行过