Research On On-line Partial Discharge Monitoring System For Smart High Voltage Switchgear

Intelligent Voltage Switchgear is one of the important electrical equipment of tht smartgrid,and plays an important role to ensure the safe operation of the smart grid. Insulationfailure is one of the main causes of intelligent high voltage switchgear and other electricalequipment power failure or accident, seriously affecting the safe operation of the powersystem. Equipment for power line partial discharge monitoring equipment can detectinsulation faults, to prevent further incidents, effectively reducing the risk of an electricalaccident, therefore, the line monitoring to th power equipment is significant. This paperfocuses on the intelligent high voltage switchgear partial discharge monitoring system to dothe research. The details are as follows:First, The principle of partial discharge and various detection methods. The overallprogram is designed intelligent voltage switchgear partial discharge monitoring system,Main including the design of ultrasound and UHF partial discharge monitoring unitSecondly, Emphasize design The hardware and software of the monitoring systemparts, in The hardware parts,designed the ultra-high frequency、the ultrasonic inspectiontesting of hardware circuits. Also designed the hardware of the DSP minimum system unitand the communication circuit unit, Under laboratory conditions, test the ultrasonic ciruits;in The software parts, designed the lower machine software of ultrasound monitoringsystem, Including signal acquisition, signal processing, display and communication programdesign, and joint debugging with the host computer.Finally, Study the pattern recognition system based on information fusion, researchedthe information fusion of Monitoring systems, including feature layer and decision-makinglayer, Realized the information fusion of system, Safeguard the reliability of the monitoringsystem. Pattern recognition is mainly carried out for the detection of ultrasonic discharge,Achieve the fault diagnosis of system.This design of ultrasonic partial discharge monitoring systems under obtain goodresults laboratory conditions, achieved the most functions of the system. UHF partialdischarge monitoring system proposed design, realization requires further study.