A Permanent Magnetic Actuator for 126 kV Vacuum Circuit Breakers

Permanent magnetic actuators (PMAs) have been widely used in medium-voltage vacuum circuit breakers (VCBs) due to their high reliability and controllability. However, a conventional bistable PMA cannot be adopted in power equipment for the transmission voltage level such as 126 kV VCBs directly because of its low-velocity characteristics. The objective of this paper is to propose a multimagnetic circuit PMA to satisfy the high-velocity requirements for 126 kV VCBs. The novel PMA is a bistable and axisymmetric structure, including holding and driving components whose magnetic circuits are separated. Air gaps are specifically designed in the magnetic circuits to improve the velocity performance of the novel PMA. Both static and dynamic characteristics of the novel PMA model have been calculated through finite-element software coupled with multi-body dynamics software. Furthermore, a prototype of the PMA has been developed according to the calculation results. The experimental results on the prototype have shown that the velocity characteristics of the PMA are able to meet the requirements of a 126 kV VCB and agree well with the simulation results.

[1]  H. Craig Miller,et al.  A Review of Anode Phenomena in Vacuum Arcs , 1985, IEEE Transactions on Plasma Science.

[2]  E. Melgoza,et al.  Comparison of table models of electromagnetic actuators , 2002 .

[3]  S. Yanabu,et al.  Historical review of high voltage switchgear developments in the 20th century for power transmission and distribution system in Japan , 2006, IEEE Transactions on Power Delivery.

[4]  M. Rong,et al.  High-Current Vacuum Arc: The Relationship Between Anode Phenomena and the Average Opening Velocity of Vacuum Interrupters , 2011, IEEE Transactions on Plasma Science.

[5]  Shaohua Ma,et al.  An approach of improve permanent magnetic actuator of vacuum circuit breaker , 2008, 2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum.

[6]  Xianbing Wang,et al.  Characteristics Analysis and Simulation of Permanent Magnet Actuator With a New Control Method for Air Circuit Breaker , 2009, IEEE Transactions on Magnetics.

[7]  B. Lequesne.  Fast-acting, long-stroke solenoids with two springs , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[8]  Peng Yan,et al.  Simulation of an improved operating method for vacuum circuit breakers with permanent magnetic actuators , 2010 .

[9]  Seungki Hong,et al.  Characteristic analysis and design of a novel permanent magnetic actuator for a vacuum circuit breaker , 2013 .

[10]  Paul G. Slade,et al.  The Vacuum Interrupter: Theory, Design, and Application , 2007 .

[11]  Byung Il Kwon,et al.  Characteristic analysis and modification of PM-type magnetic circuit breaker , 2004, IEEE Transactions on Magnetics.

[12]  Yundong Cao,et al.  Design and research on novel permanent magnetic actuator in low voltage and high current vacuum circuit breaker , 2002, 20th International Symposium on Discharges and Electrical Insulation in Vacuum.

[13]  J. Jatskevich,et al.  Interfacing Issues in Multi-Domain Simulation Tools , 2012, IEEE Transactions on Power Delivery.

[14]  M. Batdorff,et al.  High-Fidelity Magnetic Equivalent Circuit Model for an Axisymmetric Electromagnetic Actuator , 2009, IEEE Transactions on Magnetics.

[15]  Li Jin,et al.  Development of High-Voltage Vacuum Circuit Breakers in China , 2007, IEEE Transactions on Plasma Science.

[16]  E. Dullni.  A vacuum circuit-breaker with permanent magnetic actuator for frequent operations , 1998, Proceedings ISDEIV. 18th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.98CH36073).

[17]  Mouloud Feliachi,et al.  Numerical coupling models for analyzing dynamic behaviors of electromagnetic actuators , 1998 .

[18]  Jae Seok Choi,et al.  Multi-Material Optimization of Magnetic Devices Using an Allen-Cahn Equation , 2012, IEEE Transactions on Magnetics.

[19]  Rae-Eun Kim,et al.  The optimal design and dynamic characteristics analysis of electric actuator (EMFA) for 170kV/50kA VCB based on three-link structure , 2008, 2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum.

[20]  S. Min,et al.  Design of Magnetic Actuator With Nonlinear Ferromagnetic Materials Using Level-Set Based Topology Optimization , 2010, IEEE Transactions on Magnetics.