| Abstract |
Industrial expansion of the power electronic installations shifts some design criterias of converters from the converters as separate devices to their AC network power supply. However, the exact confiquration of the AC network is generally unknown, and it changes in accordance with the active load or the adjunction of new installations. Of course, for a large majority of implementations, the influence of the AC network can be ignored, as far as the average performances of the converters are concerned. Hence in some couplings, the confiquration of the AC network may cause surprising effects. For applications requiring smooth DC voltage or low harmonics distorsion high pulse converters are more preferably decided. A typical solution to obtain a high pulse number of rectification, is the use of several converters in parallel. Under certain circumstances, such solutions lead to a current unbalance function of the converters. The analysis of the phenomenon, as detailed in this paper, denotes important aspects for the design of such converters. |
