Cable joint fault detecting device with self-updating simulation data

Abstract

The invention provides a cable joint fault detecting device with self-updating simulation data, comprising an upper computer. The upper computer includes a simulation model database, a display screen,and a processor. The simulation model database stores voltage simulation waveforms Vm of reflecting signals of cable joint fault in a number of N, wherein Vm=[Vm1, Vm2,..., VmN]. For any one of the voltage simulation waveforms Vmi, Vmi=[vmi1, vmi2, ..., vmin], wherein i can be a number from 1 to N, and each simulation waveform includes n voltage values. The display screen is used for displaying the reflecting signal of a travelling wave pulse signal or displaying a sampling signal Vs of the reflecting signal, and displaying one or a plurality of Vmi matching with a Vs oscillogram, wherein Vs=[vs1, vs2, ..., vsn]. The processor is used for executing computer programs to realize related self-updating steps.

Description

technical field [0001] The invention relates to a cable joint fault detection device, in particular to a cable joint fault detection device with self-updating simulation data. Background technique [0002] During the operation of the power grid, the cable joint is the weakest link. About 70% of the cable faults occur at the joint. Therefore, it is of great significance to accurately and quickly determine the quality and operation status of the joint to ensure the safe and reliable operation of the power grid. At present, the main means of cable joint fault detection are temperature method and partial discharge method. The temperature method is to install a temperature sensor at the joint, and measure relevant parameters such as temperature and temperature rise rate; the measurement results are stored in the system control room through the corresponding transmission network, and compared with the historical records; if the joint temperature rises rapidly or If the temperatur...

AI Technical Summary

Problems solved by technology

However, this fault detection method still has the following technical problems: the waveform interpretation of the reflected signal requires the relevant professional knowledge and experience of field operators, that is, when the operator observes such as but not limited to figure 1 When using either of the two waveforms shown, only relevant professional knowledge can accurately determine whether the cable is faulty, as well as the type and location of the fault

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