3C strategy for inverters in parallel operation achieving an equal current distribution

Operation of Parallel Inverters in Microgrid Using New Adaptive PI Controllers Based on Least Mean Fourth Technique

“…Some modifications have been suggested to this scheme to increase its robustness and modularity. The circular chain control (3C) is another scheme, which is introduced to operate the distributed generation system [14]. This scheme has a typical structure of two cascaded control loops (inner for current and outer for voltage).…”

A maximum current sharing method for dual-redundancy brushless DC Motor control

“…This is a quite easy method to realize, however, there is no relation between two windings and its real-time performance is poor. Some other ways like master-slave current sharing voltage drop method maximum current sharing which are applied in the field of switching power supply can balance the winding current as well [10][11][12][13]. Compared with these methods, maximum current sharing has advantages in the accuracy, reliability and range of application.…”

Parallel operation of inverters and active power filters in distributed generation system—A review

“…The output voltage and current of each inverter can also be varied and internally controlled to achieve a fast dynamic response [13]. A coordinated control strategy for different load sharing controls can be implemented to eliminate the circulating currents due to unbalance of parallel inverters [22].…”

“…Hence, careful attention should be given to system design and the control of parallel operation of inverters. Several control methods are proposed and discussed in [3,[10][11][12][13][14][15][16][17][18][19][20][21][22]. When two or more inverters operate in parallel, the following features must be achieved: (1) amplitude, frequency and phase synchronization among the output voltages of inverters, (2) proper current distribution according to the capacities, (3) flexibility and (4) hot-swap feature at any time [14].…”