Density monitoring of high-voltage SF6 circuit breakers

Circuit breakers play a vital role in ensuring the stability and reliability of a power system [1]. When a circuit breaker operates, the contacts inside the circuit breaker open and the electrical arc is extinguished resulting in the electrical circuit being interrupted [2]. Circuit breakers are named by the medium that is used to extinguish the electrical arc, with the most common type being sulfur hexafluoride (SF6) circuit breakers [3]. Figure 1 shows a typical design of a 132-kV live tank and dead tank circuit breaker.

[1]  D. Koch,et al.  SF6 properties, and use in MV and HV switchgear , 2003 .

[2]  Dieter Zeisel,et al.  A precise and robust quartz sensor based on tuning fork technology for (SF6)-gas density control , 2000 .

[3]  Jean-Marc Biasse,et al.  Benefits of proper SF6 handling to reduce SF6 emissions for sustainable Electricity Transmission and Distribution , 2010, CICED 2010 Proceedings.

[4]  Lukas Graber.  Improving the accuracy of SF6 leakage detection for high voltage switchgear , 2011, IEEE Transactions on Dielectrics and Electrical Insulation.

[5]  Ali Hellany,et al.  Density monitoring of high voltage SF6 circuit breakers , 2014, 2014 IEEE Electrical Insulation Conference (EIC).

[6]  M Kamei,et al.  Influence of Sensor Information Accuracy on Condition-Based Maintenance Strategy for GIS/GCB Maintenance , 2011, IEEE Transactions on Power Delivery.

[7]  M. Etter,et al.  Sulfur hexafluoride SF6 , 2008, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.