In general

the power distribution of a parallel inverter is achieved by the use of droop control in a microgrid system

which consists of PV inverters and non-regeneration energy source inverters without energy storage devices in an islanded mode. If the shared load power is no more than the available maximum PV inverter output power

then there is a power waste for the PV inverter. In addition

due to the intermittency of PV sources

the system may become unstable if the shared load power is more than the available maximum power output of the PV (MPO-PV) inverter. Therefore

in order to avoid power waste and potential instability caused by insufficient PV power by traditional droop control

this paper recommends an improved droop control scheme to maximize the power output of PV units. As required by the load

the remaining power is composed of the other inverters

which can effectively improve the utilization rating of renewable energy sources and system stability. At the same time

according to the system stability analysis based on small signal modeling

it has been designed around the droop coefficients of the improved droop control loop. In the end

the simulation and experimental results show that the suggested scheme has a varied validity and robustness.