Research On The On-line Monitoring System Of Insulation Dielectric Loss Angle Specialty

With the complexity of network structure and the diversification of power equipment,the state monitoring of power equipment has been increasingly become the key to the safe operation of the system.Monitoring the running state of power equipment can make the real-time operation personnel to understand and grasp the running state of the equipment,avoiding economic losses and personnel waste caused by downtime detection.In order to lay a foundation for intelligent power grid.To this end,this paper designs the on-line monitoring system of insulation dielectric loss angle based on DSP.The main contents of this paper are as follows:The research background and significance of dielectric loss angle tangent value online monitoring are introduced.Comparative analysis the advantages and disadvantages of off-line monitoring and on-line insulation monitoring,determined to online detection method to detect insulation dielectric loss angle scheme;and according to dielectric loss angle and related principle infer the model calculation expression of dielectric loss angle.The FFT algorithm was improved by using the queue principle,and using the MATLAB programming for simulation,to determine the correctness and effectiveness of the scheme.Finally,the paper designs the hardware modules of the system,and focuses on the hardware of the signal sampling circuit.The results show that the on-line monitoring system of dielectric loss angle has good real-time performance and accuracy.