In modern power transmission and industrial power distribution systems, multi-circuit cables have become the core transmission carriers for urban power grids, rail transit, and industrial parks by virtue of their spatially intensive and highly efficient transmission characteristics. However, in reality, the cable laying environment is so complex that, over the years, the difficulty in detecting hidden faults such as insulation aging, potential defects such as partial discharges, and insufficient localization accuracy due to multi-circuit coupling after the occurrence of a fault, has also beenIncreasingly highlighted.
For this industry pain point, Shenzhen Dingxin Intelligent Technology Co., Ltd. developed and launched a new generation of multi-loop cable hazard early warning and fault location devices, through traveling wave ranging technology and high-frequency transient signal analysis, the depth of the integration of intelligent sensing and big data analysis, to help owners realize the "passive repair" to "active defense" operation and maintenance mode upgrade."Active defense" operation and maintenance mode upgrade.
Multi-circuit cable hazard warning and fault location device includes cable monitoring device, TD Tech's diagnostic system and its client, which installs monitoring terminals at cable joints and terminals, and collects real-time I.F. signals and nanosecond traveling wave pulses from each circuit.When a fault occurs, the system can quickly locate the fault point by comparing the time difference between the arrival of traveling waves at different monitoring points and combining with the cable wave speed parameter. With the high-precision timing of BeiDou/(GPS) and the online calibration technology of traveling wave speed, its fault point localization reaches <0.1%L+5 meters!Especially in multi-loop coupling scenarios, the above approach can accurately lock the loop to which the fault belongs and avoid misjudgment.
