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| 10kV High Speed Vacuum Switch With Electromagnetic Repulsion Mechanism |
| Wang Zijian1, He Junjia1, Yin Xiaogen1, Lu Jiazheng2, Hui Dong3, Zhang Hanming1 |
| 1. Huazhong University of Science and Technology Wuhan 430074 China 2. Hunan Electric Power Test and Research Institute Changsha 410007 China 3. China Electric Power Research Institute Beijing 100085 China |
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Abstract A two dimensional(2D)finite element model is applied to analyze the dynamic characteristics of the electromagnetic repulsion mechanism. In order to verify the validity of the simulation results, a simplified electromagnetic repulsion mechanism is established. The discharge current and the contact time between metal tie rod and cushioning device are measured. A good agreement between the measurements and the simulation results is obtained. Detailed investigations are performed by simulation regarding the impacts of various structure parameters and capacity of energy storage capacitor on the dynamic characteristics of the electromagnetic repulsion mechanism. Two methods are put forward for increasing the opening velocity of the switch. Based on the simulation results, a 10kV-40kA-2500A high speed switch prototype with an electromagnetic repulsion mechanism and a disk spring mechanism is developed. It can open within 0.5 ms from the trip signal, and the travel time is 1.6ms.
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Received: 16 April 2008
Published: 18 February 2014
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2009, Vol. 24 
