In view of the problems with the traditional grid-tied inverter in voltage and frequency regulation

power decoupling and mode switchover

it is proposed that the voltage-controlled inverter be used to improve the grid-tied mode. For this purpose

two kinds of grid-tied modes based on voltage-controlled inverter with axes

the synchronous generator operation mode and maximum power operation mode

are recommended. Experimental results are found agreeable with the digital simulation results

which verify the correctness of theoretical analysis that the grid-tied power control capability of the distributed systems will be enhanced. This work is supported by Shanghai Talent Development Fund (No. 2012024) and Innovation Program of Shanghai Municipal Education Commission (No. 13ZZ132).