| When considering Power Electronics System Integration (PESI), we have to deal with parallel operation of the converters. This dissertation mainly focuses on some key issues in parallel operation of DC/DC modules. In low power level applications, the droop method is popular used. Based on the complexity, the cost, the modularity, the reliability, and the current-sharing performance etc. a detailed comparison on various current-sharing methods is presented in the dissertation. In the middle power level applications, active current-sharing method is dominated. Outer Loop Regulation plus Basic Average Program Method, as well as Outer Loop Regulation plus Automatic Master Method, are two well-selected methods for middle power level applications. In this dissertation, the small-signal model about these two methods is presented, analysis of current-sharing error and voltage regulation performances is also discussed. The simulation and experimental results verify the theoretical analysis. At last, large-signal stability analysis of paralleled DC/DC converters is briefly described. |
