| Abstract |
In this paper, the authors present a method to evaluate the sensitivity of thyristor converters to parasites. The parasitic impulses are considered as random perturbations. The evolution which these impulses give to a system can cause significant consequences. It is therefore necessary to develop mathematical models to study the system's behaviour with respect to these disturbances. The evaluation of the probability of correct functionning is also absolutely essential. In the proposed study, the control signals as well as the parasitic signals are represented in vector from which a theoretical development technique is deduced. This technique allows the determination of the probability of correct functionning of an m thyristor system subjected to n parasitic impulses in an operation cycle. The method is subsequently applied to two autoadaptative choppers. This study gives the best choice of system structure and control strategy for a safe operation. |
