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This paper is devoted to doing a simulation research on the cushioning process of hydraulic operating mechanism applied on 252kV high voltage circuit breakers and suggesting an effective design method to improve the performance of buffer device. According to the working principle of cushioning process, parametric analysis and optimization are carried out for the buffer process with considering step...
The working performance of high voltage circuit breakers is with great importance for the security of power grid. In this paper, a kind of permanent magnet operating mechanism was modeled and studied. The simulation model was verified by experiments. The opening and closing process is divided into three stages according to its force analysis, respectively. The angle displacement of main axis is related...
In this paper, a numerical simulation model for 252kV puffer circuit breaker is constructed, and a novel concept of transparent arc root is introduced to suppress the unwanted arc column contraction. The novel methods have been implemented into PHOENICS and verified successfully by measurement. The arcing process of N2 and SF6 in a circuit breaker is simulated under different conditions, and reasonable...
A 3-D model of an arc in a low-voltage circuit breaker is used to simulate arc root transfer from the moving contact to the arc runner, as the contact is opened.
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