|
In high-voltage circuit breakers and high-speed railway Pantograph-OCS system, the plasma arc directly causes economic loss to the ablation of the equipment. It is important to study the electrical characteristics of the arc. Therefore, based on MATLAB/Simulink, several existing arc models are simulated to obtain the voltage and current waveforms of the arc and the volt-ampere characteristics. Through comparative analysis, the applicable conditions, advantages and disadvantages of several models are clarified, which provides a reference for the improvement of future arc models. The results show that the high-current arcing phase and the high-resistance and low-current phase of the arc are considered separately, and the simulation results are more accurate. The arc model time constant and the dissipated power are regarded as the functions of the arc conductance, and the simulation results can better reflect the dynamic changes of the arc conductance.
|
