Optimization of the Control System of Parallel Connected Stabilized Constant-Voltage Power Supplies

A synthesis technique of the control system of parallel connected stabilized constant-voltage power supplies which have common load is proposed. The main idea is synthesis of additional current feedback loops, these loops are based on the own converter current and the current of other converter. This technique provides increase of common load voltage stability and maximum distribution equability of load current among power supplies. The following cases of applying this technique are reviewed: two, three and four parallel connected converters. All the possible control system structures are considered for each of these cases.