The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In recent years high-speed electromagnetic repulsion mechanism (ERM), which is produced based on the eddy-current effect, has been widely applied to vacuum circuit breakers. One of the challenges for the design of ERM is to improve the speed of ERM by optimization design. In this paper, a novel co-simulation model is proposed. The related electromagnetic field, mechanical field and structural field...
With the development of HVDC technology, the demand of HVDC circuit breaker is more and more urgent, where the testing standards for HVDC circuit breaker is still absent. It's impractical to carry out test in the real HVDC system at present. The high-power HVDC source is also a high-cost scheme. Therefore, in most of the experiments of HVDC circuit breaker, the current is supplied by AC source. In...
HVDC interruption technique is the bottleneck problem of flexible HVDC project. The HVDC vacuum circuit breaker based on artificial current zero is a feasible and effective method to solve this problem. In this circuit breaker, the parameters of the commutation branch have a vital influence for the breaking process. In this paper, the interruption process for HVDC based on artificial current zero...
Vacuum circuit breakers have been being widely used in the electric power system in recent years for its excellent breaking capability. The whole interrupting process can be divided into two main stages: the arcing phase and the post-arc dielectric recovery phase. The later phase has a decisive effect on the whole interruption which has attracted many concerns. The dissipation of the residual plasma...
The temperature rise is very critical for the normal operation of switchgear, in which eddy current and contact resistance are the two important influence factors. In this paper, firstly, the main conductive circuit model of one kind of 12kV medium voltage switchgear is established using commercial software Solidworks. Secondly, the effect of the eddy current and contact resistance on the temperature...
In this paper, the relationship between the external transverse magnetic field (TMF) and the ignition probability of new cathode spot in different directions is developed assuming that the ignition probability of a new cathode spot is proportional to the magnetic pressure around the old one. Furthermore, a method is established to simulate the 2-D motion of a cathode spot step-by-step. With this approach,...
Wire electrical explosion (WEE) in vacuum was studied through a 0D model coupled with circuit configuration following the model proposed by Beilis and co-workers. The results were compared with their simulation results. With this model, the influences of some factors including current rise rate and plasma density were analyzed.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.