10kV cable head operation state evaluation method based on flow temperature composite monitoring model

Abstract

The invention relates to a 10kV cable head operation state evaluation method based on a flow temperature composite monitoring model, and the method comprises the following steps: 1, building a sensor array topology model, and solving the problem of mutual interference of three-phase current magnetic fields in a cable switch cabinet; 2, on the basis of the mathematical model of the TMR current sensor, magnetic electricity taking and current monitoring are achieved; 3, establishing a flow temperature curve model based on the relationship between the current and the temperature; 4, a cable head operation state diagnosis model is built, and intelligent monitoring of cable composite sensing parameters is achieved; according to the invention, non-contact current value measurement of the switch cabinet cable is realized, integrated application of two parameters of the current and the temperature sensor is carried out, a current-temperature curve model is established based on the relationship between the current and the temperature, and real-time monitoring of the operation state of the switch cabinet is realized; the device has the advantages that the monitoring effect is good, and double-parameter real-time monitoring of the current and the temperature of the cable is achieved.

Description

technical field [0001] The invention relates to the technical field of power equipment state monitoring, in particular to a method for evaluating the running state of a 10kV cable head based on a flow-temperature composite monitoring model. Background technique [0002] At present, the current measurement of conductors such as switchgear or ring network cabinet cable heads, cable outlets, and busbars adopts contact or non-contact measurement methods. Among them, the contact type needs to be electrically connected to the measured conductor. The method not only destroys the circuit structure of the original conductor, but also makes the switchgear or ring network cabinet cables have uncertain operation safety risks, and more importantly: it causes great safety hazards to the staff during the contact measurement process; However, in the existing non-contact measuring equipment, due to the mutual influence of the magnetic fields between the three-phase currents, there are defect...

AI Technical Summary

Problems solved by technology

[0002] At present, the current measurement of conductors such as switchgear or ring network cabinet cable heads, cable outlets, and busbars adopts contact or non-contact measurement methods. Among them, the contact type needs to be electrically connected to the measured conductor. The method not only destroys the circuit structure of the original conductor, but also makes the switchgear or ring network cabinet cables have uncertain operation safety risks, and more importantly: it causes great safety hazards to the staff during the contact measurement process; However, in the existing non-contact measuring equipment, due to the mutual influence of the magnetic fields between the three-phase currents, there are defects such as large magnetic field interference and inaccurate measurement results. As an important parameter in the power system, current is an important parameter for its measurement technology. Research is always active in modern power systems; therefore, it is necessary to provide a 10kV cable head operation status evaluation method based on a flow-temperature composite monitoring model that has good monitoring effects and realizes dual-parameter real-time monitoring of cable current and temperature of

Images