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Study on Partial Discharge Monitoring and Location of SF6 High-voltage Circuit Breaker

Author: SunWenJuan
Tutor: ChuYan
School: Chang'an University
Course: Traffic Information Engineering \u0026 Control
Keywords: Breaker Partial discharge UHF Sensor Locate
CLC: TM561
Type: Master's thesis
Year: 2009
Downloads: 173
Quote: 2
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Abstract


SF more and more used in 6 high-voltage circuit breaker with its small size , high safety and reliability , less maintenance , and other prominent advantages of power system . Operating experience shows , the insulation fault circuit breakers in all types of accidents , account for a large proportion of partial discharge has become the main reason for insulation fault , and , once the circuit breaker failure , repair time will be very long , the power system more harm . Therefore , the circuit breaker partial discharge monitoring and discharge source localization method , has a very important significance for the protection of the safe and reliable operation of the circuit breaker , the insulation condition , and the guidance of the circuit breaker maintenance work to master breaker . Firstly, on the basis of analysis of domestic and international breaker partial discharge monitoring methods research status , exploring both ring type and circular plate -type sensor built-in sensor circuit breaker partial discharge monitoring , respectively, using the capacitive coupling model and antenna model the system depth study of the performance of these two sensors . Simulation and measured results show that this choice of the two built-in sensor performance , high sensitivity , and able to meet the requirements of the circuit breaker PD signal monitoring above the circular plate -type sensor ring sensor sensitivity . Then focus on the use of sensor receives the time difference of the signals carried PD source localization launched , respectively, using the unit impulse response method based on correlation analysis and energy than the energy - based detection method, delay estimation, compare two methods of treatment effect , discuss the impact of the delay estimation accuracy and improvement measures. Tests confirmed that the use of the time difference may be more accurate positioning of the partial discharge source . In contrast to the currently widely used in high-voltage electrical equipment partial discharge monitoring and positioning method chosen ring built-in sensors capable of accurately sensing Bureau put signal and study the time difference location method can achieve the goal of partial discharge source for accurate positioning has broad application prospects .

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CLC: > Industrial Technology > Electrotechnical > Electrical > Electrical switches,circuit breakers > Breaker
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