Design And Analysis Of Mine Substation Equipment Fault Diagnosis System Based On Temperature Variation

As a key component of the power system,the reliability of high-voltage electrical equipment directly affects the power system.As a key component of the power system,the reliability of high-voltage electrical equipment directly affects the safe operation of the power system.In the application and practice of high-voltage electrical equipment,aging,improper operation or unreasonable installation will lead to latent faults of electrical equipment,which is generally manifested as temperature change,that is,temperature change.If the temperature change is not found in time,after the operation fault of electrical equipment,it will cause huge economic losses and even major safety accidents;Especially for most modern coal mining enterprises,the safety accidents caused by the overheating fault of high-voltage electrical equipment in mine substations account for a large proportion.Once the high-voltage electrical equipment in mine substations fails,there will be a large-scale power outage in the mine,which will seriously affect the production safety of the mine and threaten the lives of mine staff.Therefore,with the help of advanced technology,real-time monitoring of mine high-voltage electrical equipment to avoid overheating fault due to temperature change reaction,so as to eliminate the potential safety hazards in the operation of mine substation electrical equipment,which has important social significance and application value.In this thesis,the temperature variation monitoring system of electrical equipment in mine substation is constructed by using advanced fiber Bragg grating temperature sensor to monitor the temperature variation parameters of electrical equipment in mine substation in real time;Through the fusion mode of BP neural network and D-S evidence theory,the monitored temperature rise data of electrical equipment in mine substation are analyzed and optimized,and the fault state of electrical equipment is diagnosed.The research achievements of this thesis mainly include:(1)Temperature change is not only a symptom of high-voltage electrical equipment failure,but also the cause of high-voltage electrical equipment failure.Paying attention to the temperature monitoring of high-voltage electrical equipment can effectively prevent equipment failure and reduce or reduce economic losses.(2)Based on the working characteristics of FBG temperature sensor and tunable light source,a multi-channel parallel fiber Bragg grating sensor network system scheme is formulated to complete the construction of fiber Bragg grating temperature sensing monitoring system and the layout and installation of fiber Bragg grating sensors.(3)Using the fusion mode of BP neural network and D-S evidence theory to analyze the temperature rise data of electrical equipment in mine substation can effectively diagnose the fault state of electrical equipment,reduce the uncertainty probability,and the diagnosis effect is ideal.With the help of advanced information fusion technology,this thesis analyzes the causes and operation status of temperature change fault of electrical equipment,which provides a reference for future research and practice.